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General Purpose Water Accounting Report 2013–2014

NSW Murray catchment

General Purpose Water Accounting Report 2013-2014 – NSW Murray catchment

ii | NSW Office of Water, December 2014

Publisher: NSW Department of Primary Industries, Office of Water

Title: General Purpose Water Accounting Report 2013-2014 –NSW Murray Catchment

First published: December 2014

ISBN: 978-1-74256-706-8

More information [email protected] www.water.nsw.gov.au

This report may be cited as: Burrell M., Moss P., Petrovic J., Ali A., (2014) General Purpose Water Accounting Report 2013-2014 – NSW Murray catchment, NSW Department of Primary Industries, Sydney

Cover image: Edward River at Offtake downstream of weir, courtesy of NSW Office of Water Hydrometric Gauging Team

Jobtrack number 13356

© State of New South Wales through the Department of Trade and Inv estment, Regional Inf rastructure and Serv ices 2014. You may copy , distribute and otherwise f reely deal with this publication f or any purpose, prov ided that y ou attribute the NSW Department of Primary Industries as the owner.

Disclaimer: The inf ormation contained in this publication is based on knowledge and understanding at the time of writing (December 2014). Howev er, because of adv ances in knowledge, users are reminded of the need to ensure that inf ormation upon which they rely is up to date and to check currency .

mailto:[email protected]


iii | NSW Office of Water, December 2014

Table of Contents Introduction ............................................................................................................................................................................ 1

Contextual Statement ........................................................................................................................................................ 2

Upper Murray ...................................................................................................................................................................... 2 Central Murray.................................................................................................................................................................... 2 Lower Murray ...................................................................................................................................................................... 3

Accounting extent ............................................................................................................................................................... 3

Climate .................................................................................................................................................................................. 5 Dam inflows and volume................................................................................................................................................. 8 High flow events .............................................................................................................................................................. 12 Surface water resources and management ........................................................................................................... 13 Trading ................................................................................................................................................................................ 15 Environmental Water ..................................................................................................................................................... 17

Planned environmental water................................................................................................................................. 17 Held environmental water ........................................................................................................................................ 18

Water Accounting Statements..................................................................................................................................... 20

Significant water accounting policies........................................................................................................................ 21 Quantification of data ..................................................................................................................................................... 21

Data accuracy .............................................................................................................................................................. 21 2013-14 Murray Physical Flows Mass Balance Diagram ................................................................................. 22 Statement of Water Assets and Water Liabilities ................................................................................................. 23 Changes in Water Assets and Water Liabilities.................................................................................................... 24

Note Disclosures................................................................................................................................................................ 27

Reconciliation and future prospect descriptions ................................................................................................... 28 Note 1 – Allocation accounts....................................................................................................................................... 31 Note 2 – Available water determination (AWD) (allocation announcement) .............................................. 34 Note 3 – Allocation account usage............................................................................................................................ 38 Note 4 – Account Water Trading (allocation assignments) .............................................................................. 40 Note 5 - Intervalley Trade Account (IVT) ................................................................................................................ 42 Note 6 – Held environmental water........................................................................................................................... 45 Note 7 – Environmental provisions ........................................................................................................................... 48 Note 8 – Surface water storage ................................................................................................................................. 51 Note 9 – River channel storage.................................................................................................................................. 52 Note 10 - Snowy required annual release .............................................................................................................. 53 Note 11 – Storage inflow .............................................................................................................................................. 56 Note 12 – Storage evaporation and storage rainfall ........................................................................................... 57 Note 13 – River evaporation and river rainfall ....................................................................................................... 58 Note 14 – Gauged tributary inflow............................................................................................................................. 59 Note 15 – Ungauged runoff estimate ....................................................................................................................... 61 Note 16 – Dam releases, river inflow from dam releases ................................................................................. 62 Note 17 – End of system / Flow leaving .................................................................................................................. 64 Note 18 – NSW Extractions from river ..................................................................................................................... 66 Note 19 – Victoria extractions ..................................................................................................................................... 67 Note 20 – Snowy water savings transfer ................................................................................................................ 68 Note 21 – Basic rights extractions ............................................................................................................................. 69 Note 22 – Supplementary extractions ...................................................................................................................... 70 Note 23 – Unaccounted difference............................................................................................................................ 76

Appendix 1 - Groundwater ............................................................................................................................................ 77


iv | NSW Office of Water, December 2014

Tables Table 1: 2013-14 monthly rainfall and historic monthly rainfall statistics at Tumbarumba, Berrigan

and Moulamein ...........................................................................................................6 Table 2: Water Allocation Licence Accounting Rules 2013-14 ................................................... 13 Table 3: Water account data accuracy estimates key ............................................................... 21 Table 4: Explanatory information for allocation account summary .............................................. 32 Table 5: Allocation account balance summary for the NSW Murray regulated river 2013-14 ........ 33 Table 6: Priority of access licence categories ........................................................................... 34 Table 7: Allocation summary report notes ................................................................................ 35 Table 8: Allocation announcements for the NSW Murray regulated river water source 2013-14 ... 36 Table 9: Licence category metered usage apportionment table ................................................. 39 Table 10: Account usage summary 2013-14 .............................................................................. 39 Table 11: Murray- Murrumbidgee inter-valley trade account summary ......................................... 43 Table 12: Explanatory information for Environmental Account Summary ...................................... 46 Table 13: NSW Murray regulated water source environmental account balance summary 2013-14

................................................................................................................................ 47 Table 14: NSW Murray regulated water source environmental holding summary 2013-14............. 47 Table 15: Barma-Millewa Environmental Allowance ................................................................... 50 Table 16: Additional Environmental allowance ........................................................................... 50 Table 17: Storage summary table ............................................................................................. 51 Table 18: Summary of river channel storage calculation components .......................................... 52 Table 19: Snowy-Murray RAR summary table............................................................................ 54 Table 20: Components for backcalculation of inflow ................................................................... 56 Table 21: Summary of storage evaporation and rainfall 2013-14 ................................................. 57 Table 22: Rainfall and evaporation summary table ..................................................................... 58 Table 23: Summary of NSW Murray gauged tributary inflow 2013-14 .......................................... 59 Table 24: NSW daily tributary inflow to Murray 2013-14.............................................................. 60 Table 25: End of System Flows................................................................................................. 64 Table 26: Reconciliation of physical extraction to account usage (ML) ......................................... 66 Table 27: NSW Murray supplementary events summary 2013-14 ............................................... 71 Table 28: NSW Murray groundwater water sharing plan summary............................................... 78 Table 29: NSW Murray surface water catchment groundwater sources summary table................. 81


v | NSW Office of Water, December 2014

Figures Figure 1: Surface water geographical extent of the accounts ........................................................4 Figure 2: Monthly Rainfall Data and historical median deviations at Tumbarumba, Moulamein and

Berrigan .....................................................................................................................5 Figure 3: Murray catchment annual rainfall for 2013-14................................................................7 Figure 4: Average annual rainfall in the Murray catchment (1961-1990) ........................................7 Figure 5: Long-term unregulated inflows to Hume Dam against mean and reporting year inflow .....8 Figure 6: Long-term inflows to Dartmouth Dam against mean and reporting year inflow .................9 Figure 7: Long-term inflows Wilcannia gauging station against mean and reporting year inflow ......9 Figure 8: Daily inflows and rainfall at Hume Dam 2013-14 ......................................................... 10 Figure 9: Daily inflows and rainfall at Dartmouth Dam 2013-14 ................................................... 10 Figure 10: Flows at Wilcannia against rainfall 2013-14 ................................................................ 10 Figure 11: Daily inflows and rainfall at Lake Victoria 2013-14 ....................................................... 11 Figure 12: Hume Dam 2013-14 behaviour (volume and percentage) ............................................ 11 Figure 13: Dartmouth Dam 2013-14 behaviour (volume and percentage)...................................... 11 Figure 14: Combined Menindee 2013-14 behaviour (volume and percentage) .............................. 12 Figure 15: Lake Victoria 2013-14 behaviour (volume and percentage) .......................................... 12 Figure 16: Flows in the Murray River 2013-14 ............................................................................. 13 Figure 17: NSW Murray Account Water Availability (Carryover + Available Water Determinations .. 14 Figure 18: NSW Murray supplementary licence and uncontrolled flow usage since commencement

of water sharing plan ................................................................................................. 15 Figure 19: NSW Murray total share component and usage since the introduction of the water sharing

plan (excludes supplementary licences) ..................................................................... 15 Figure 20: Allocation assignments (trade) Out of the NSW Murray ............................................... 16 Figure 21: Net volume of allocation assignment (trade) Out of NSW Murray by water source ......... 16 Figure 22: Total assignments of share component by licence category ......................................... 17 Figure 23: Share assignments purchases to environmental holders and non-environmental holders

................................................................................................................................ 17 Figure 24: Barmah-Millewa Environmental Water Allowance summary since commencement of plan

................................................................................................................................ 18 Figure 25: NSW Murray Additional Environmental Allowance summary since commencement of plan

................................................................................................................................ 18 Figure 26: Held environmental water share component in the NSW Murray catchment .................. 19 Figure 27: Held environmental water available against usage since the commencement of the plan

................................................................................................................................ 19 Figure 28: NSW Murray catchment allocation assignment summary 2013-14................................ 41 Figure 29: Victorian daily tributary inflow to Murray 2013-14......................................................... 60 Figure 30: Hume Dam releases 2013-14 .................................................................................... 62 Figure 31: Dartmouth Dam releases 2013-14.............................................................................. 63 Figure 32: Lake Victoria Dam releases 2013-14 .......................................................................... 63 Figure 33: End of system flow to South Australia 2013-14 ........................................................... 65 Figure 34: Total monthly supplementary usage in the NSW Murray 2013-14 ................................. 74 Figure 35: NSW Murray supplementary usage by river section 2013-14 ....................................... 75 Figure 36: NSW Murray surface water catchment – groundwater water sharing plans ................... 79 Figure 37: Potential recharge deviation non-modelled areas 2013-14 ........................................... 83 Figure 38: NSW Murray catchment, non-modelled areas annual potential recharge (1971-72 to

2013-14)................................................................................................................... 84


vi | NSW Office of Water, December 2014

Abbreviations Acronym Description

AEA Murray Additional Environmental Al lowance

ARCGIS Mapping and spatial analysis platform for designing and managing solutions through the application of geographic knowledge

AWAS 1 Austra lian Water Accounting Standards

AWD Avai lable Water Determination

B-M EWA Barmah-Millewa Environmental Water Allowance

CAIRO Computer Aided Improvements to River Operations

Ck Creek

DECCW NSW Department of Environment, Climate Change and Water

D/S Downstream

EWA Environmental Water Allowance

GIS Geographic Information System

GL Gigalitres (1,000,000,000 l i tres)

GMA Groundwater Management Area

GPWAR General Purpose Water Accounting Report

IQQM Integrated Quantity and Quality Model

LAS Licencing Administration System

MDBA Murray-Darling Basin Authority

MIL Murray Irrigation Limited

ML Megalitres (1,000,000 l itres)

MODFLOW Modular Three Dimensional Finite-Difference Groundwater Flow Model

NSW New South Wales

SA South Australia

SILO Cl imatic data provision system run by Queensland government for the provision of both measured and modeled data.

U/S Upstream

VIC Victoria

WASB Water Accounting Standards Board


vii | NSW Office of Water, December 2014

Glossary Term Definition

Al location The specific volume of water allocated to water allocation accounts in a given season, defined according to rules established in the relevant water plan.

Al location assignments The transfer of water between l icence holder a llocation accounts as a result of a trade agreement. The assignment becomes part of the receiver’s current year a l location account water.

Al location Account Water account attached to an access licence used to track the balance of account water.

Aqui fer Soi l or rock below the land surface that is saturated with water. A confined aquifer has layers of impermeable material above and below it and is under pressure. When the aquifer is penetrated by a well, the water ri ses above the top of the aquifer. In an unconfined aquifer, the upper water surface (water table) i s at atmospheric pressure and thus i s able to rise and fall.

Ava i lable Water Determination (AWD)

The process by which water i s made available for use and shared amongst water users who hold a water access licence. It determines the volume of water that is to be added to an individual’s l icence allocation account.

Austra lian Water Accounting Standard (AWAS)

A national standard that prescribes the basis for preparing and presenting a General Purpose Water Accounting Report (GPWAR). It sets out requirements for the recognition, quantification, presentation and disclosure of i tems in a GPWAR.

Back-calculation A ca lculation approach using a mass balance to determine an unknown variable (used to ca lculate storage inflows based on balancing the change in storage volume where inflow is the only unknown).

Bas ic rights The non-licensed right to extract water to meet basic requirements for household purposes (non-commercial uses in and around the house and garden) and for watering of stock. It is available for anyone who has access to river frontage on their property.

Computer Aided Improvements to River Operations (CAIRO)

A spreadsheet-based water balance model used for optimising river operations (orders and releases)

Carryover The volume or share component that may be reserved by a licence holder for use in the proceeding year.

Catchment The areas of land which collect ra infall and contribute to surface water (s treams, rivers , wetlands) or to ground-water. A catchment is a natural drainage area, bounded by sloping ground, hills or mountains, from which water flows to a low point.

Conveyance licence Defined l icence category that provides an a llowance for losses in the delivery of water.

Dead s torage The volume in storage that is generally considered unavailable for use (e.g water level below release valves) due to access and often poor water quality.

Dealings A water dealing refers to a change that can be made to a licence, in particular, those arising from trading including the sale of all or part of an access l icence or account water. May a lso include a change in location, licence category or consolidation/subdivision of licences.

Double entry accounting Double-entry accounting is a method of record-keeping that records both where money (or in this case water) comes from and where it goes. Using double-entry means that water i s never gained or lost - i t is a lways transferred from somewhere (a source account) to somewhere else (a destination account).

Effective s torage The tota l volume of storage minus the dead s torage component – the volume generally considered as useable.

Effluent Flow leaving a place or process. Sewage effluent refers to the flow leaving a sewage treatment plant. An effluent stream is one which leaves the main river and does not return.

Enti ty A defined geographical area or zone within the accounting region. Transactions and reports are produced for each entity.

End of system The last defined point in a catchment where water information can be measured and/or reported.


viii | NSW Office of Water, December 2014

Environmental water Water a llocated to support environmental outcomes and other public benefits. Envi ronmental water provisions recognise the environmental water requirements and are based on environmental, social and economic considerations, including exis ting user rights.

Equity Tota l assets minus total liabilities

Evaporation The process by which water or another l iquid becomes a gas. Water from land areas, bodies of water, and a ll other moist surfaces is absorbed into the atmosphere as a vapour.

Evapotranspiration The process by which water i s transmitted as a vapour to the atmosphere as the result of evaporation from any surface and transpiration from plants.

Extraction The pumping or diverting of water from a river or aquifer by l icensed users for a specific purpose (irrigation, s tock, domestic, towns, etc). The volume is measured at the point of extraction or diversion (river pump, diversion works etc).

General Purpose Water Accounting Report (GPWAR)

A report prepared according to the Australian Water Accounting Standard. It is comprised of a number of components including a contextual statement, a Statement of Water Assets and Water Liabilities, a Statement of Change in Water Assets and Water Liabilities, a Statement of Physical Water Flows, Notes and Disclosures, and an assurance and accountability s tatement

General security l icence A category of water access licence implemented under the Water Management Act 2000. Forms the bulk of the water access licence entitlement volume in NSW and is a low priority entitlement i.e. only receives water once essential and high security enti tlements are met in the available water determination process.

Groundwater Water location beneath the ground in soil pore spaces and in the fractures of rock formations.

High security l icence A category of l icence water access licence implemented under the Water Management Act 2000. Receives a higher priority than general security l icences but less priority than essential requirements in the available water determination process.

HYDSTRA database A database used by NSW Office of Water to s tore continuous time series data such as river flow, river height, and water quality.

Inflows Surface water runoff and deep drainage to groundwater (groundwater recharge) and transfers into the water system (both surface and groundwater) for a defined area.

Inter-valley trade Trade of licence holder allocation account water, via allocation assignment, from one catchment to another catchment (or s tate).

Intra-valley trade Trade of licence holder allocation account water, via allocation assignment, within the same catchment.

Licence Administration System (LAS)

The system used by NSW Office of Water to manage water access licence information and transaction.

Liability A legally binding obligation to settle a debt.

Median The middle point of a distribution, separating the highest half of a sample from the lowest half.

Non-physical transaction An accounting transaction representing a process that is not a component of the water cycle (e.g. an available water determination).

Phys ical transaction An accounting transaction representing a process of the water cycle (e.g. a extraction)

Recharge Groundwater recharge i s a hydrologic process where water drains downward from surface water to groundwater. Groundwater i s recharged naturally by ra in, floods and snow melt and to a smaller extent by drainage directly from surface water (such as rivers and lakes).

Regulated river A river system where flow is controlled via one or more major man-made s tructures e.g. dams and weirs. For the purposes of the Water Management Act 2000 a regulated river is one that i s declared by the Minister to be a regulated river. Within a regulated river system l icence holders can order water against a held entitlement.

Replenishment flows Flows provided along effluent systems downstream of a water source to supply water for household, town use and s tock.

http://en.wikipedia.org/wiki/Hydrology

http://en.wikipedia.org/wiki/Water

http://en.wikipedia.org/wiki/Surface_water

http://en.wikipedia.org/wiki/Groundwater

http://en.wikipedia.org/wiki/Rain

http://en.wikipedia.org/wiki/Snow


ix | NSW Office of Water, December 2014

Return inflows Water that has been diverted from a river by a water user and is then returned to the river after use (e.g. can include non-consumptive uses, such as hydropower, cooling water for industry or water for aquaculture). This water is included as an inflow to the basin because the water is available to be diverted downstream or will pass the bas in outlet.

Share component An enti tlement to water specified on the access licence, expressed as a unit share or in the case of specific purpose licences (eg. local water utility, major water utility and domestic and stock) a volume in megalitres. The amount of water a l icence holder is a l located as a result of an available water determination and the amount they can take in any year is based on their share component.

Snowpack Volume of water stored in packed snow that upon melting will result in a system inflow.

Steady State A condition in a physical groundwater system where the volume does not change over time, or in which any one change in volume is continually balanced by another.

Storage A s tate-owned dam, weir or other s tructure which is used to regulate and manage river flows in the catchment and the water bodies impounded by these s tructures.

Storage discharge The volume of water released from storage in a specified time frame.

Storage reserve Proportion of water in a s torage reserved in the resource assessment process for future essential or high security requirements (e.g. town water).

Storage volume The tota l volume of water held in storage at a specified time.

Sub account This is the separation of account water into specific categories to a llow different accounting rules to apply to each.

Supplementary water Unregulated river flow available for extraction under a supplementary l icence.

Surface water Al l water that occurs naturally above ground including rivers, lakes, reservoirs, creeks, wetlands and estuaries.

Trans lucent flow The release of an agreed percentage of an incoming flow event from a dam for envi ronmental purposes immediately downstream of the dam.

Transparent flow The release of all or part of an incoming flow event from a dam for environmental purposes at one or more sites downstream of the dam.

Tributary A smaller river or s tream that flows into a larger river or s tream. Usually a number of smaller tributaries merge to form a river.

Uncontrolled flow Water permitted to be extracted without debt under a general security access licence during a supplementary flow event. The extracted water may be progressively debited to the general security account if water availability exceeds predefined levels.

Ungauged catchment A catchment without a flow gauge to accurately record s tream flows. Modelled estimates must be used to approximate the contribution of ungauged catchments to the main river.

Water accounting The systematic process of identifying, recognising, quantifying, reporting, assuring and publishing information about water, the rights or other claims to that water, and the obligations against that water

Water assets The physical water held in storage, as well as any claims to water that are expected to increase the future water resource (e.g. external water entering the system through intervalley trading).

Water l iabilities Cla ims on the water assets of the water report entity including water that has been a l located to licence holder accounts or environmental accounts but yet to be taken at the end of the reporting period.

Water sharing plan A water management plan that defines the rules for sharing of water within a region under the Water Management Act 2000.

General Purpose Water Accounting Report 2013-2014 – NSW Murray Catchment

1 | NSW Office of Water, December 2014

Introduction This document is a General Purpose Water Accounting Report (GPWAR) for the regulated, component of the NSW Murray River system, prepared by the New South Wales Office of Water under the Australian Water Accounting Standard 1 (WASB, 2012).

The GPWAR has been prepared for the reporting period of 1 July to 2013 to 30 June 2014 and aims to provide a consolidated and informative annual summary of the available water resources and the water resource management that occurred during this period.

While groundwater has not been specifically included in the GPWAR (the physical interactions between the river and groundwater form part of the unaccounted difference presented in the accounting statements), annual summary information pertaining to physical groundwater flows, and the management of groundwater resources in the Murray catchment is presented in Appendix 1 of this report.

As Deputy Commissioner of the New South Wales Office of Water I hereby declare:

• The information presented in these accounts as a faithful representation of the management and operation of the NSW Murray Regulated River Water Source in 2013-2014

• All data presented in this report is based on the best available information at the time of publication.

• The NSW Office of Water has to the best of its ability prepared this GPWAR for the NSW Murray Regulated River Water Source for the 2013-14 water year in accordance with the Australian Water Accounting Standard 1.

Bruce Cooper

Deputy Commissioner, Water Resource Assessment and Management

NSW Office of Water



Contextual Statement The NSW Murray catchment stretches over southern New South Wales, northern Victoria and south-eastern South Australia. The main drainage feature is the Murray River which begins in the mountains of the Southern Alps of NSW and Victoria, and flows in a westerly direction for over 2,500 km to its outlet on the South Australian coast near Goolwa. It forms the boundary between NSW and Victoria for 1,880 km (Figure 1). At Wentworth in south-west NSW the Murray is joined by its major tributary the Darling River which drains an area of 116,000 square kilometres of NSW and Queensland. The NSW Murray catchment represents one fifth of the total area of the Murray-Darling Basin (MDB), one of the most significant agricultural areas in Australia.

In NSW the Murray River moves through three distinct landscapes. The following three sections combine together as the NSW Murray Catchment: (i) Upper Murray (ii) Central Murray and (iii) Lower Murray.

Upper Murray The Upper Murray comprises the headwaters and unregulated reaches of the Murray River upstream of Hume Dam to Lake Mulwala, near Yarrawonga. The river begins its course amongst the high mountain peaks of Mount Kosciusko and Mount Jagungal in the Snowy Mountains, marking the border between NSW and Victoria through to Hume Dam.

The upper catchment is generally rugged and mountainous which has restricted agricultural and urban development. Vast areas of the catchment remain forested with native vegetation and over one third of the catchment is protected within National Parks. Elevations across the catchment range from around 2,200 metres around the alpine peaks in the east to approximately 150 metres at Hume Dam.

Hume Dam is the main operational storage for the Murray River. It has been supplying regulated deliveries of water to the Murray River system since its completion in 1936 (the wall was raised in 1961).The Mitta Mitta River is the major Victorian tributary to Hume Dam. It flows northwards from the high country near Omeo and enters Hume Dam near Tallangatta. Dartmouth Dam was constructed on the Mitta Mitta River in 1979 and with a capacity of nearly 4,000,000 megalitres is the largest storage in the Murray system. Dartmouth Dam is primarily used as a drought reserve for the system, with bulk transfers of water released to Hume Dam as required.

The most extensive land use in the Upper Murray is conservation with nearly one third of the catchment designated as National Parkland. Outside this, forestry and grazing are the dominant land use.

Central Murray The Central Murray area broadly covers central Murray River from Yarrawonga in the east to the Darling River-Murray River confluence at Wentworth, in the west. Major tributaries include the Goulburn, Campaspe and Loddon rivers in Victoria, and the Murrumbidgee and Wakool rivers in New South Wales.

As the Murray River enters Lake Mulwala (the major storage in central Murray), it then continues west through Yarrawonga Weir. Flows are diverted from the Murray through various creeks and channels to the Edward-Wakool River system which aligns the Murray River floodplain, west of Deniliquin. The Wakool River joins the Murray River west of Moulamein. In the central Murray, the Murray River system receives inflow from the Murrumbidgee catchment via Billabong Creek and the Murrumbidgee River. The Murray River then flows into Mildura Weir surrounded by Mallee River Basin and Benanee Basin.

The majority of the Central Murray is used for agricultural purposes with grazing being the dominant land use. The flat riverine plains make the region suitable for a variety of dryland



and irrigated cropping enterprises. The Murray Irrigation Area also resides within Central Murray (Murray Riverina catchment) and is the largest irrigation scheme in New South Wales.

Lower Murray The Lower Murray covers the area between the confluence of the Darling and Murray Rivers at Wentworth through to the Murray River outlet on the South Australian coast near Goolwa. The Lower Murray covers around 100,000 square kilometres with major tributaries including the Darling River, the Great Darling Anabranch and the Marne River.

The Darling River delivers inflow to the Murray River and a component of the resources held in the Menindee Lakes Scheme are dedicated to meeting the Murray River system requirements. Lake Victoria which is located in the western Riverina region of south western New South Wales is a naturally occurring shallow freshwater lake of the Murray Catchment that is used as a re-regulating storage to transfer water to South Australia.

Downstream of Lake Victoria, the Murray River flows into South Australia and turns south for its final 500 kilometres before it reaches Lake Alexandrina, and finally, the Murray Mouth. The main tributary in South Australia that feeds the Murray River is the Marne River.

Accounting extent This report covers the extent illustrated in Figure 1, and includes the water features, licences, entitlements and management covered by the NSW Murray Regulated River Water Source under the rules stipulated in the Water Sharing Plan for the NSW Murray and Lower Darling Regulated Rivers Water Sources.

While physical groundwater volumes that interact with the regulated river are not explicitly represented in the GPWAR statements (interactions form part of the unaccounted difference), supporting information for groundwater flows and management in the NSW Murray accounting extent for 2013-14 is provided in Appendix 1.



Figure 1: Surface water geographical extent of the accounts



Climate Overall the Murray catchment experienced a year of average climatic conditions in 2013-14 following on from a drier than average year in 2012-13. Annual rainfall totals were about average across the catchment varying from 145 millimetres in the north-west through to 2,500 millimetres in the eastern part of the catchment (Figure 3 and Figure 4).

Using Tumbarumba (upper Murray), Berrigan (mid Murray) and Moulamein (lower Murray) as reference points, the figures indicate that while the annual rainfalls were about average the monthly rainfalls varied being at or below average from July to November and at or above average from December to June. High levels of rainfalls of approximately twice the historic mean occurred in the lower and mid catchments in December and the upper and mid catchments in April and June (Figure 2 and Table 1).

Figure 2: Monthly Rainfall Data and historical median deviations at Tumbarumba, Moulamein and Berrigan

0

20

40

60

80

100

120

140

160

180

200

Jul

Aug

Sep

Oct

Nov De

c

Jan

Feb

Mar Ap

r

May Jun

Rain

fall

(mm

/mon

th)

Tumbarumba Median Moulamein MedianBerrigan Median Tumbarumba 2013-14Moulamein 2013-14 Berrigan 2013-14

2013-14 monthly rainfall median deviation

-60

-40

-20

0

20

40

60

80

100

Jul

Aug

Sep

Oct

Nov De

c

Jan

Feb

Mar Ap

r

May Jun

Rain

fall

Devi

atio

n (m

m)

TumbarumbaMoulameinBerrigan



Table 1: 2013-14 monthly rainfall and historic monthly rainfall statistics at Tumbarumba, Berrigan and Moulamein1

Tumbarumba Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Annual

2013-14 114.4 113.6 73.4 59.2 26.2 47.8 33.0 63.4 83.4 131.8 67.8 183.0 997.0

Historic statistics

Mean 105.2 107.2 90.7 96.4 74.8 70.6 61.9 55.1 67.3 66.1 82.3 103.2 980.8

Median 93.7 104.3 88.2 90.8 68.4 62.5 55.3 51.2 51.6 59.1 71.3 91.2 972.4

Lowest 14.2 8.6 9.6 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.5 10.6 523.6

Highest 254.6 246.6 225.3 259.7 240.2 212.4 203.2 252.2 260.4 224.6 295.4 322.1 1,663.2

Highest year 1986 1939 1960 1976 2011 1919 1897 2011 1906 1974 1942 1923 1955-56

Berrigan Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Annual

2013-14 37.0 31.0 24.3 15.5 20.1 55.9 29.4 13.9 40.6 108.7 39.2 83.8 499.4

Historic statistics

Mean 39.7 42.9 38.8 42.3 32.1 33.0 30.7 30.6 34.7 35.1 40.6 42.4 442.7

Median 34.8 39.2 32.3 36.1 26.6 22.2 20.0 19.2 24.6 26.0 28.7 38.6 426.4

Lowest 0.0 0.3 1.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 168.4

Highest 108.4 124.2 110.3 155.0 154.7 247.9 264.0 159.0 181.3 159.3 162.1 115.3 932.4

Highest year 1986 1889 1906 1975 1912 1930 1974 1969 1956 1939 1889 1931 1973-74

Moulamein Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Annual

2013-14 29.1 20.4 19.8 14.8 3.6 83.6 5.2 35.0 24.0 42.0 35.4 32.8 345.7

Historic statistics

Mean 31.4 33.9 31.5 34.2 27.9 31.3 23.3 25.0 26.0 25.4 34.3 34.0 357.7

Median 29.6 28.2 25.3 27.5 18.6 20.3 12.5 13.9 16.1 17.8 30.4 27.2 342.6

Lowest 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 170.0

Highest 103.3 123.7 111.7 114.9 145.9 190.2 180.8 151.1 154.2 122.4 110.4 160.3 872.6

Highest year 1936 1958 1906 1973 1889 1930 1974 1946 1906 1974 1906 1923 1973-74

1 Long term statistics are from the Bureau of Meteorology – climate data online, using the climatic stations ‘72043 – Tumbarumba post Off ice’, ‘74009 – Berrigan Post Off ice’ and ’75046 – Moulamein Post Off ice ’. Historic record statistics are 1886 to 2014 for Tumbarumba, 1875 to 2014 for Berrigan and 1888 to 2014 for Moulamein.



Figure 3: Murray catchment annual rainfall for 2013-14

Figure 4: Average annual rainfall in the Murray catchment (1961-1990)



Dam inflows and volume Consistent with the average catchment conditions, 2013-14 inflow to Dartmouth Dam and Hume Dam (unregulated inflow) was at or slightly below average, and at similar totals to the previous year but lower than the previous 2 years proceeding them (Figure 5 and Figure 6). For Menindee Lakes the gauging station, Darling River at Wilcannia indicated the 2013-14 annual flows were significantly less than the previous few years flow volumes (Figure 7).

The 2013-14 water year commenced with Hume Dam at 62 per cent (1,891,728 megalitres), Dartmouth Dam at 90 per cent (3,642,201 megalitres), Menindee Lakes at 72 per cent (1,251,737 megalitres) and Lake Victoria at 79 per cent (536,638 megalitres) of capacity (Figure 8 to Figure 11). High demands in the Murray meant that both Hume Dam and Menindee Lakes were drawn down during the year to 50 per cent (1,534,232 megalitres) and 22 per cent (380,778 megalitres) respectively. With only minimum transfers of water required from Dartmouth Dam to Hume Dam and average catchment conditions the volume of water held in Dartmouth Dam remained steady finishing the year at 86 per cent of capacity (3,508,129 megalitres) while Lake Victoria finished the year at 68 per cent of capacity (459,869 megalitres).

Figure 5: Long-term unregulated inflows to Hume Dam against mean and reporting year inflow 2

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

1891

-92

1896

-97

1901

-02

1906

-07

1911

-12

1916

-17

1921

-22

1926

-27

1931

-32

1936

-37

1941

-42

1946

-47

1951

-52

1956

-57

1961

-62

1966

-67

1971

-72

1976

-77

1981

-82

1986

-87

1991

-92

1996

-97

2001

-02

2006

-07

2011

-12

Annu

al In

flow

(MLx

1000

)

Long-term unregulated 2013-14 unregulated annual Mean annual unregulated

2 While the long term annual historical unregulated storage inflow s for Hume Dam w ere obtained from the Murray Darling Basin Authority the 2011-12, 2012-13 and 2013-14 unregulated inflow s were derived by NOW undertaking a detailed backcalculated storage balance see Note 11.



Figure 6: Long-term inflows to Dartmouth Dam against mean and reporting year inflow 3

0

1,000

2,000

3,000

1891

-92

1896

-97

1901

-02

1906

-07

1911

-12

1916

-17

1921

-22

1926

-27

1931

-32

1936

-37

1941

-42

1946

-47

1951

-52

1956

-57

1961

-62

1966

-67

1971

-72

1976

-77

1981

-82

1986

-87

1991

-92

1996

-97

2001

-02

2006

-07

2011

-12

Annu

al In

flow

(MLx

1000

)Long-term annual 2013-14 annual Mean annual

Figure 7: Long-term inflows Wilcannia gauging station against mean and reporting year inflow

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

1895

-96

1899

-00

1903

-04

1907

-08

1911

-12

1915

-16

1919

-20

1923

-24

1927

-28

1931

-32

1935

-36

1939

-40

1943

-44

1947

-48

1951

-52

1955

-56

1959

-60

1963

-64

1967

-68

1971

-72

1975

-76

1979

-80

1983

-84

1987

-88

1991

-92

1995

-96

1999

-00

2003

-04

2007

-08

2011

-12

Flow

(ML

x 10

00)

Long-term annual flow 2013-14 annual flow Mean annual flow

3 While the long term annual historical storage inflow s for Dartmouth Dam and Hume Dam w ere obtained from the Murray Darling Basin Authority the 2011-12, 2012-13 and 2013-14 inf low s were derived by NOW undertaking a detailed back-calculated storage balance see Note 11.



Figure 8: Daily inflows and rainfall at Hume Dam 2013-14

0

10

20

30

40

50

60

70

80

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

45,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Rain

fall

(mm

)

Inflo

w (M

L)Hume Rainfall Hume Inflow

Figure 9: Daily inflows and rainfall at Dartmouth Dam 2013-14

0

5

10

15

20

25

30

35

40

45

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Rain

fall

(mm

)

Inflo

w (M

L)

Dartmouth Rain Dartmouth Inflow

Figure 10: Flows at Wilcannia against rainfall 2013-14

0

5

10

15

20

25

30

0

200

400

600

800

1,000

1,200

1,400

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Rain

fall

(mm

)

Flow

(ML/

d)

Wilcannia Rainfall Wilcannia Daily Flow



Figure 11: Daily inflows and rainfall at Lake Victoria 2013-14

0

5

10

15

20

25

30

35

40

45

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Rain

fall

(mm

)

Inflo

w (M

L)Lake Victoria Rainfall Lake Victoria Inflow

Figure 12: Hume Dam 2013-14 behaviour (volume and percentage)

30

40

50

60

70

80

90

100

900

1,200

1,500

1,800

2,100

2,400

2,700

3,000

3,300

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Volu

me

(ML

x 10

00)

1,891,728 ML (62%) 1,534,232 ML (50%)

Stor

rage

per

cen

t ful

l (%

)

Figure 13: Dartmouth Dam 2013-14 behaviour (volume and percentage)

90

85

95

3,300

3,400

3,500

3,600

3,700

3,800

3,900

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Volu

me

(ML

x 10

00)

3,642,201 ML (90%) 3,508,129 ML (86%)

Stor

rage

per

cen

t ful

l (%

)



Figure 14: Combined Menindee 2013-14 behaviour (volume and percentage)

80

60

40

20

200

400

600

800

1,000

1,200

1,400

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Volu

me

(ML

x 10

00)

Stor

age

Perc

ent f

ull (

%)

1,251,737 ML (72 %)

380,778 ML (22 %)

Figure 15: Lake Victoria 2013-14 behaviour (volume and percentage)

60

70

80

90

100

350

400

450

500

550

600

650

700

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Volu

me

(ML

x 10

00)

Stor

rage

per c

ent f

ull (

%)

536,638 ML (79%)459,869 ML (68%)

High flow events While there were no major high flow (flood) events in 2013-14 in the Murray River, during the early part of the 2013-14 an inflow event from the Ovens River resulted in high flows in the Murray in the first few months downstream of Lake Mulwala (Figure 16). Consequently these higher flows combining with flows from the Murrumbidgee and releases from Lake Victoria also resulted in high flows to South Australia in the early months of 2013-14.



Figure 16: Flows in the Murray River 2013-14

05,000

10,00015,00020,00025,00030,00035,00040,00045,00050,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Flow

(ML/

day)

D/S Yarrawonga Weir D/S Torrumbarry Weir Swan Hill Below Rufus River

Surface water resources and management The NSW Murray water source was managed under the conditions set out in the Water Sharing Plan for the NSW Murray and Lower Darling Regulated Rivers Water Sources 2003, for the entirety of 2013-14. The licence allocation accounting rules that were in place are summarised in Table 2.

Table 2: Water Allocation Licence Accounting Rules 2013-14

Licence Category Account Limit Carryover Limit Annual Use Limit Maximum AWD

Domestic and Stock 100% 0% N/A 100%

Domestic and Stock [Domestic] 100% 0% N/A 100%

Domestic and Stock [Stock] 100% 0% N/A 100%

Loca l Water Utility 100% 0% N/A 100%

Conveyance 1 ML/share 0 ML/share N/A 100%

General Security 1.1 ML/share 0.5 ML/share N/A 1.1 ML/share

High Security 1 ML/share 0 ML/share N/A 1 ML/share High Security (Community and Education)

1 ML/share 0 ML/share N/A 1 ML/share

High Security (Research) 1 ML/share 0 ML/share N/A 1 ML/share

High Security (Town Water Supply) 1 ML/share 0 ML/share N/A 1 ML/share

Supplementary Water N/A 0 ML/share N/A 1 ML/share

The carryover volume (including the balance of the environmental water allowance (EWA)) into the year amounted to 308,413 megalitres and the opening allocations on 1 July 2013 was 100 per cent for domestic and stock, high security, local water utility and supplementary licence holders. The opening announcement for general security and conveyance licence holders was 0.38 and 0.65 megalitres per share respectively with subsequent announcements throughout the year bringing the total for these licence categories to 0.96 and 1 megalitres per share respectively.

Water availability4 for general security in the NSW Murray in 2013-14, as was the case in 2012-13, was effectively at the maximum allowable levels as defined under the water



sharing plan with carryover plus available water determinations being approximately 110 per cent of the total licensed entitlement. Water availability for all other categories of licence was also at maximum allowable levels (Figure 17).

In the NSW Murray the combination of high levels of water availability and the climate condition that prevailed in 2013-14 corresponded to a high level of demand for water across the catchment with account usage while less than as in 2012-13 still remaining high (Figure 19).

Account usage (total for all licence categories) in 2013-14 was 1,564,464 including 137,103 megalitres obtained from supplementary flow access (Figure 18).

The requirement to provide a total minimum flow contribution of 1,850,000 megalitres per annum at the South Australian border under the Murray Darling Basin Agreement was met in 2013-14. No additional dilution flows were required to be delivered to South Australia in 2013-14. In 2013-14 a total of approximately 3,555,000 megalitres flowed to South Australia (see Note 17).

Figure 17: NSW Murray Account Water Availability (Carryover + Available Water Determinations)[ 5][ 6][ 7]

0

20

40

60

80

100

120

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Wat

er A

vaila

bilit

y (%

of E

ntitl

emen

t)

Conveyance Domestic and Stock General Security High security Local water utility

4 Water availability refers to the sum of w ater that was made available in accounts and does not take into account annual use limits. 5 Supplementary licences have been excluded. Each year of the plan this licence category has been granted an available w ater determination of 100 per cent, how ever access to this w ater is contingent on high f low events available. Actual usage information against this category of licence is available in note 3 of this GPWAR. 6 Includes all access licences issues under the w ater sharing plan and therefore held environmental w ater 7 At the commencement of the w ater sharing plan (2004-05) water held in general security accounts was allowed to be brought forward as an opening balance.



Figure 18: NSW Murray supplementary licence and uncontrolled flow usage since commencement of water sharing plan

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Usa

ge (M

L)

Supplementary Uncontrolled Flow

Figure 19: NSW Murray total share component and usage since the introduction of the water sharing plan (excludes supplementary licences)

2,225,000

2,230,000

2,235,000

2,240,000

2,245,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Shar

e Co

mpo

nent

(ML)

0

200,000

400,000

600,000

800,000

1,000,000

1,200,000

1,400,000

1,600,000

1,800,000

2,000,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Usa

ge (M

L)

Conveyance Domestic and Stock General Security High security Local water utility

Trading The dominant direction of trading continues to be out of the valley for the NSW Murray with a net volume of approximately 378,894 megalitres being trade to external valleys. This amount is the highest since the commencement of the plan and consistent with the trend which indicates an upward trend in the trade out (Figure 20). The water moving into the NSW Murray (net) in 2013-14 was from the Murrumbidgee water source, while the net trade out



was made up of significant levels of trade to South Australia, Victoria and the Lower Darling (Figure 21).

Permanent share assignments totalled around 23,000 unit shares in 2013-14 with the majority being from general security licences (Figure 22). Environmental purchases of these share assignments accounted for approximately 55 per cent (by volume) of these transactions (Figure 23).

Figure 20: Allocation assignments (trade) Out of the NSW Murray

-100,000

0

100,000

200,000

300,000

400,000

500,000

600,000

700,000

800,000

900,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Allo

catio

n As

signm

ents

(ML)

Assignments In Assignments Out Net Assignments out of Murray

Figure 21: Net volume of allocation assignment (trade) Out of NSW Murray by water source

-150,000

-100,000

-50,000

0

50,000

100,000

150,000

200,000

250,000

300,000

350,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Net

Allo

catio

n As

signm

ents

Out

(ML)

Murrumbidgee Lower Darling Victoria South Australia



Figure 22: Total assignments of share component by licence category8

0

20,000

40,000

60,000

80,000

100,000

120,000

2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Shar

es a

ssig

ned

Conveyance General Security High Security Supplementary

Figure 23: Share assignments purchases to environmental holders and non-environmental holders

0

20,000

40,000

60,000

80,000

100,000

120,000

2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Shar

es a

ssig

ned

Environmental Purchases Non Environmental Purchases

Environmental Water

Planned environmental water

The Barmah-Millewa environmental water allowance (B-M EWA) is available to provide environmental benefits to the Barmah-Millewa forest but under specific circumstances (water restrictions) can be borrowed and made available to regulated Murray River access licence holders. In 2013-14 the total water available to the B-M EWA was 97,480 megalitres (including 104,180 megalitres carried forward from 2012-13) however in 2013-14 there was no water borrowed or used for environmental outcomes in Barmah-Millewa. Figure 24 provides a graphical representation of the behaviour of the B-M EWA since the commencement of the water sharing plan. In addition while up to 50,000 megalitres can be taken as overdraw from the B-M EWA it has not been required since the commencement of the water sharing plan.

8 Share assignment includes only dealings w here the purchase price is greater than zero. Share assignments w ith purchase prices of zero are assumed to be a result of licence consolidation or movement of w ater between family members and as such are not indications of the trade market.



Figure 24: Barmah-Millewa Environmental Water Allowance summary since commencement of plan

0

50,000

100,000

150,000

200,000

250,000

300,000

350,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Volu

me

(ML)

Total Available Use Borrow Account Borrow Repay

An addition environmental water allowance (AEA) is also made available under the water sharing plan and is credited annually with a volume equivalent to 0.03 megalitres per share of the combined share component of NSW Murray high security licences. In 2013-14 a total of 16,874 megalitres was available and zero was used. Figure 25 shows the behaviour of the AEA since the commencement of the water sharing plan and shows that to date no usage of this allowance has occurred. The AEA was spilled in 2010-11 as a result of Hume Dam spilling.

For additional details on environmental provisions in the NSW Murray refer to Note 7.

Figure 25: NSW Murray Additional Environmental Allowance summary since commencement of plan

0

5,000

10,000

15,000

20,000

25,000

30,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Volu

me

(ML)

Total Available Use Spill Forfeiture

Held environmental water Total held environmental water in the NSW Murray catchment continued to increase during 2013-14. General security share component grew from 429,456 megalitres to 443,370 megalitres including an increase of 779 megalitres in the Murray Irrigation Limited general security holding. In other licence categories, regulated river conveyance share component increased from 31,230 to 31,860 megalitres, high security share component increased from 15,703 to 22,334 megalitres while supplementary share component remained relatively unchanged at approximately 100,000 megalitres (Figure 26).



In 2013-14 the usage against held environmental water was 83,786 megalitres well below the available water of 501,079 megalitres (17 per cent utilisation). In general since the commencement of the water sharing plan utilisation of held environmental water has been low with the maximum being approximately 60 per cent in 2011-12 (see Figure 27). In addition 31,881 megalitres was transferred to Snowy Hydro for use to improve river health and deliver environmental benefits in the Snowy and Murray Rivers (see Note 20).

A detailed account balance for held environmental water is available in Note 6 of this GPWAR.

Figure 26: Held environmental water share component in the NSW Murray catchment9

0

100,000

200,000

300,000

400,000

500,000

600,000

700,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Shar

e Co

mpo

nent

(ML)

General Security General Security (MIL) High Security Conveyance Supplementary

Figure 27: Held environmental water available against usage since the commencement of the plan10

0

100,000

200,000

300,000

400,000

500,000

600,000

2004-05 2005-06 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14

Volu

me

(ML)

Total Available Usage

9 General Security (MIL) refers to w ater held by the Commonw ealth w ithin Murray Irrigation Limited and hence is not a separate licence but form part of the MIL general security licence. 10 Supplementary licences have been excluded. Each year of the plan this licence category has been granted an available w ater determination of 100 per cent, how ever access to this w ater is contingent on high f low events available.



Water Accounting Statements



Significant water accounting policies The water accounting statements in this GPWAR have been prepared using an accrual basis of accounting. All figures are in megalitres (ML).

The ‘Statement of Physical Flows’ has been excluded for this GPWAR as all transactions have been presented in the statements ‘Water Assets and Liabilities’ and ‘Changes in Water Assets and Water Liabilities’. A ‘Physical Flow Diagram’ that represents the physical movements of water has been included in order to provide a clearer depict those accounting processes associated with physical flow movement.

For a general information on how to interpret the NOW water accounting statements refer to the Guide to General Purpose Water Accounting Reports available for download from the NSW Office of Water website.

Quantification of data

Data accuracy

It is important to recognise that the data used to account for water movement and management in the reporting entity has been obtained from a variety of sources and systems. The data ranges from observed values where a high accuracy would be anticipated through to modelled results and estimates where accuracy can be highly variable depending on a range of factors. To address the inconsistencies in accuracy and prevent misuse of the data in the accounts, all figures in the water accounting statements will be accompanied by an assessment of accuracy (Table 3).

Table 3: Water account data accuracy estimates key

Accuracy Description

A1 +/- 0% Data is determined rather than estimated or measured. Therefore the number contains no inaccuracies.

A +/- 10%

B +/- 25%

C +/- 50%

D +/- 100%

http://www.water.nsw.gov.au/



2013-14 Murray Physical Flows Mass Balance Diagram

30/06/2013 182,00030/06/2013 222,000 Change: 40,000Murray River System

205,329

103,498

4,099,113

Inflow

Evaporation

Rainfall

929,962

Release

77,459

65,137

809,611

Inflow

Evaporation

Rainfall

Unaccounted DifferenceRainfall: 65,115Billabong Creek: 107,839Murrumbidgee River: 348,470Victoria Tributaries: 3,318,150

River Inflow

Edward/Wakool River System

Yarrawonga Weir

30/06/2013 94,96630/06/2013 107,024

Change: 12,058

Evaporation: 164,188NSW Extraction: 1,564,464

Victorian Extractions: 1,432,490Basic Rights: 2,118

River Outflow to Aquifer: 0

River Outflow

631,243

42,516

Inflow

Evaporation

Rainfall

4,350,252

Release

Darl

ing R

iver

418,250

Release

30/06/2013 36,73730/06/2013 36,817

Change: 80

Torrumbarry Weir

Dartmouth Reservoir30/06/2013 3,640,80230/06/2013 3,508,129

Change: (132,673)

Hume Reservoir30/06/2013 1,887,20230/06/2013 1,534,232

Change: (352,970)

3,561,910

232,946 30,356

Inflow

Evaporation Rainfall

End of System flow to South Australia

Lake Victoria30/06/2013 532,12730/06/2013 459,869

Change: (72,258)

All figures in megalitres

Weir

Major Storage

Outflow

Inflow

1,059,378

Release

Menindee Lakes30/06/2013 1,251,28030/06/2013 380,778Change: (870,502)

Flow Leaving to Murrumbidgee

1,189,710

1,508,877

136,475

239,692River Inflow

13,001

(123) Storage decrease




Statement of Water Assets and Water Liabilities As at 30 June 2014 SURFACE WATER ASSETS ( ) denotes negative

1. Surface Water Storage Accuracy Notes 30 June 2014 30 June 2013

Hume Dam A 8 1,534,232 1,887,203

Dartmouth Dam A 8 3,508,128 3,640,801

Menindee Lakes A 8 380,778 1,251,280

Lake Victoria A 8 459,869 532,127

Lake Mulwala (Yarrawonga Weir) A 8 107,023 94,966

Torrumbarry Weir A 8 36,817 36,737

River (Murray) B 9 222,000 182,000

Total Surface Water Storage (Asws) 6,248,847 7,625,114

Change in Surface Water Storage (1,376,267) (1,607,678)

2. Claims to Water Accuracy Notes 30 June 2014 30 June 2013

Intervalley Trade Account (IVT) A1 5 99,188 17,148

Total Surface Water Storage (Acl) 99,188 17,148

Change in Total Claims to Water 82,040 11,455

SURFACE WATER LIABILITIES

3. Allocation Account Balance Accuracy Notes 30 June 2014 30 June 2013

Domestic and Stock (D&S) A1 1 (7) (5)

General Security A1 1 486,279 193,258 High Security (HS) A1 1 (188) (268)

Regulated River Conveyance A1 1 0 0

Total Allocation Accounts (Lsws) 486,085 192,985

Change in Allocation Account Balance 293,099 (545,969)

4. Environmental Provisions Accuracy Notes 30 June 2014 30 June 2013

Planned Environmental Water A1 7

Barmah-Millewa Allowance (BMA) 97,480 104,180

Additional Environmental Allowance 16,874 11,248

Total Environmental Provisions (Lep) 114,354 115,428

Change in Environmental Provisions (1,074) 79,772

NET SURFACE WATER ASSETS Net Surface Water Assets (Asws + Acl - Lsws - Lep) 5,747,597 7,333,849

Change in Net Surface Water Assets (1,586,252) (1,130,026)




Changes in Water Assets and Water Liabilities For the year ended 30 June 2014 (1 of 3)

1. CHANGES IN SURFACE WATER STORAGE (Physical Water Balance) ( ) denotes negative Surface Water Storage Increases Accuracy Notes 2013-2014 2012-2013

Hume Dam Hume Dam - Murray Required Annual release A 11 795,900 1,250,000 Hume Dam - Natural A 11 2,373,250 2,579,671 Hume Dam - Dartmouth Release A 11 929,962 494,133 Rainfall B 12 103,498 98,957

Dartmouth Dam Inflow A 11 809,611 794,381 Rainfall B 12 65,137 57,263

Menindee Lakes Inflow A 11 136,475 1,678,175 Rainfall B 12 42,516 101,592

Lake Victoria Inflow A 11 1,189,710 1,582,068 Rainfall B 12 30,356 20,330

Murray River Ra infall C 13 65,115 53,314 Gauged Tributary Inflow A 14 3,774,459 5,288,724 Inflow from Storage Releases A 16 5,409,630 6,598,172 Inflow from Darling River A 14 239,692 1,384,560

Total Surface Water Storage Increases (Isws) 15,965,311 21,981,340 Surface Water Storage Decreases Accuracy Notes 2013-2014 2012-2013

Hume Dam Evaporation B 12 205,329 203,831 Storage Release A 16 4,350,252 5,201,159

Dartmouth Dam Evaporation B 12 77,459 66,930 Storage Release A 16 929,962 494,133

Menindee Lakes Evaporation B 12 631,243 788,628 Storage Releases A 16 418,250 1,657,679

Lake Victoria Evaporation B 12 232,946 154,623 Storage Releases A 16 1,059,378 1,397,013

Murray River Evaporation C 13 164,188 169,333 Diversions to Lake Victoria A 11 1,189,710 1,582,068 Diversions to Murrumbidgee A 17 13,001 17,176 End of System Flow to South Australia A 17 3,561,910 7,024,600 Bas ic Rights Extraction C 21 2,118 2,118 Victorian licensed extractions from river A 19 1,432,490 1,692,270 NSW Murray l i cenced extractions from river A 18 1,564,464 2,031,473

Total Surface Water Storage Decreases (Dsws) 15,832,700 22,483,034

Unaccounted Volume (Balancing Item) (Usws) D 23 1,508,878 1,105,984

Net Surface Water Storage Inflow (Isws - Dsws - Usws) (1,376,267) (1,607,678)




Changes in Water Assets and Water Liabilities For the year ended 30 June 2014 (2 of 3)

2. CHANGES IN CLAIMS TO WATER ( ) denotes negative Claims To Water Increases Accuracy Notes 2013-2014 2012-2013

IVT account A1 5 Bulk transfer: RAR to Murrumbidgee from Murray 0 39,000 Al location account Trade into Murray 180,850 234,574 Net diversion to Murrumbidgee (Via Finley Escape) 1,389 5,049

Total Claims to Water Increases (lctw) 182,239 278,623

Claims To Water Decreases Accuracy Notes 2013-2014 2012-2013 IVT account A1 5

Bulk Transfer:RAR to Murray from Murrumbidgee 0 0 Bulk Transfer:To Murray via Balranald 40,282 87,542 Trade to Murrumbidgee from Murray System 59,917 179,426 Net Tagged Trade 0 200

Total Claims to Water Decreases (Dctw) 100,199 267,168 Net Claims to Water Balance Increase (Ictw - Dctw) 82,040 11,455 3. CHANGES IN ALLOCATION ACCOUNTS

Allocation Account Increases Accuracy Notes 2013-2014 2012-2013 Avai lable Water Determinations A1 2

Domestic and Stock 17,173 17,183 General Security 1,613,214 1,089,657 High Security 187,541 187,541 High Security (Community and Education) 47 47 High Security (Research) 800 800 High Security (Town Water Supply) 3,195 3,195 Loca l Water Utility 33,497 33,497 Conveyance 330,000 330,000

Internal Trading - Buyers A1 4 386,070 312,270 Al location Account Water Traded In from External A1 4 84,525 255,729 Supplementary water demand A 22 137,103 139,870 Prior Year account Adjustments 0 189

Total Allocation Increases (Iaa) 2,793,164 2,369,978




Changes in Water Assets and Water Liabilities For the year ended 30 June 2014 (3 of 3) ( ) denotes negative

Allocation Account Decreases Accuracy Notes 2013-2014 2012-2013 Account Forfeiture A1 1

Domestic and Stock 7,394 7,512 General Security 18,071 21,810 High Security 15,160 15,845 High Security (Community and Education) 19 19 High Security (Research) 800 800 High Security (Town Water Supply) 0 2 Loca l Water Utility 12,768 13,564 Conveyance (Main River) 0 1

Account Usage A 1,3 Domestic and Stock 9,762 9,630 General Security 933,943 1,412,565 High Security 102,845 110,620 High Security (Community and Education) 28 28 High Security (Town Water Supply) 3,195 3,193 Loca l Water Utility 18,284 18,518 Conveyance (Main River) 359,305 337,049 Supplementary water A 22 137,103 139,870

Internal Trading - Sellers A1 4 386,070 312,270 Al location Account Water Traded Out to External A1 4 463,420 479,823 Transfer to Snowy – Water Savings A1 20 31,881 31,929 Licenced Cancelled A 1 19 899 Prior Year Account Adjustments 0 2

Total Allocation Decreases (Daa) 2,500,065 2,915,949 Net Allocation Account Balance Increase (Iaa - Daa) 293,099 (545,971) 4. CHANGES IN ENVIRONMENTAL PROVISIONS Environmental Provisions Increases Accuracy Notes 2013-2014 2012-2013

Planned Environmental Water Balance Total Increases (Iep) A1 7 80,626 80,622 Environmental Provisions Decreases Accuracy Notes 2013-2014 2012-2013

Planned Environmental Water Balance Total Decreases (Dep) A1 7 81,700 850 Net Environmental Provisions Balance Increase (Iep - Dep) (1,074) 79,772

Change in Net Surface Water Assets (lsws-Dsws-Usws+Ictw-Dctw-Iaa+Daa-lep+Dep) (1,586,252) (1,130,026)



Note Disclosures



Reconciliation and future prospect descriptions

Reconciliation of change in net water asset to net change in physical water storage

2013-14 2012-13

ML ML

CHANGE IN NET SURFACE WATER ASSETS (1,586,252) (1,130,026)

Non-physical adjustments

Net Change in Allocation Accounts 293,099 (545,969)

Net Change in Environmental Provisions (1,074) 79,772

Net Change in Claims for Water: Intervalley (82,040) (11,455)

209,985 (477,652)

NET CHANGE IN PHYSICAL SURFACE WATER STORAGE (1,376,267) (1,607,678)

Reconciliation of closing water storage to total surface water assets

30 June 2014 30 June 2013

ML ML

CLOSING WATER STORAGE

Surface Water Storage

Hume Dam 1,534,232 1,887,203

Dartmouth Dam 3,508,128 3,640,801

Menindee Lakes 380,778 1,251,280

Lake Victoria 459,869 532,127

Less Victorian s torage share (3,181,000) (3,773,000)

Less South Australian storage share (49,000) 0

TOTAL SURFACE WATER ASSETS 2,653,007 3,538,411

Notes: All figures can be derived from or found directly in the Water Accounting Statements of the General Purpose Water Accounting Report.



Water assets available to settle water liabilities and future commitments within 12 months of reporting date (ML) Note (ML)

TOTAL WATER ASSETS AS AT 30 June 2014 (WARP) 2,653,007

Plus: Water Asset increases within 12 months of reporting date (WAI)

Snowy RAR 623,300 10

Minimum Useful Tributaries 65,000 (a)

Minimum Storage Inflow 200,000 (b) 888,300

Less: Water assets not available to be accessed and taken or delivered within 12 months of reporting date. (WANA)

Menindee Lakes Volume 380,778 (c)

Storage Net Evaporation (NSW Share) 130,000 (d)

Murray Essential Requirements 2015-16 240,000 (e)

Mandatory Reserve (NSW) 100,000 (f)

Lower Darling Essential Requirements 2015-16 0 (g)

Transmission Losses 395,000 (h)

End of System Flows to South Australia (NSW) 925,000 (i )

Conveyance Losses 2015-16 100,000 (j)

Dead Storage (NSW Share) 97,000 8 2,367,778

Water assets available to be accessed and taken or delivered within 12 months of reporting date.

1,173,529

Less: Water liabilities and future commitments expected to be settled within 12 months of the reporting date.

Water Liabilities expected to be delivered within 12 months of reporting date. (WLE)

Surface Water Carryover 486,279 1 Envi ronmental Provisions Carryover 114,354 7 600,663

Future Commitments expected to be delivered within 12 months of reporting date. (FC)

Indicative Allocations and Basic Rights (k)

EWA Al lowance Increase 59,079 (l )

General Security 100,325 1

Conveyance 173,000

High Security 185,957 1

Domestic and Stock 17,173 1

Loca l Water Utility 33,497 1

Bas ic Rights 2,118 21

Lower Darling Commitments 2013-14 0 (m) 571,149 1,171,782

Surplus of available water assets over water liabilities and future commitments expected to be settled within 12 months of the reporting date. (SWA) SWA = (WARP + WAI - WANA - WL E – FC)

(n) 1,747



Notes: (a) The proportion of the statistical long term minimal inflow sequence downstream of the storages that can be used to settle liabilities

and future commitments. (b) The statistical long term annual minimal inflow sequence to storages. (c) Menindee Lakes is under NSW control with all water being used for Broken Hill Town Water supply of Lower Darling demand. Hence

Menindee Lakes water is not available for Murray. (d) This is an estimate of the annual impact of the net effect of rainfall and evaporation on the storages. (e) The NSW Murray catchment puts aside sufficient amount of water asset to meet the essential requirements for two years. This

figure represents the essential requirement in year two being made up of towns, high security, stock and domestic, minimum storage releases, and basic rights.

(f) Water set aside as a minimum storage reserve in order to meet South Australian future requirements in 2015-16. (g) The NSW Lower Darling catchment puts aside sufficient amount of water asset to meet the essential requirements for two years.

This figure represents the essential requirement in year two being made up of towns, high security, stock and domestic, minimum storage releases, basic rights and estimated loss to deliver them. This volume is zero when NSW is in control of Menindee Lakes.

(h) This is the volume of water set aside to account for the losses encountered in the delivery of the water liabilities and future commitments.

(i) This is the NSW share of the flow that is expected to be supplied to South Australia in 2014-15. (j) This is the volume of water set aside in order to deliver the essential requirements in 2015-16. (k) Indicative Allocation represents a proposed starting allocation for each licence category. Local water utilities, domestic and stock and

sub categories of high security receiving a potential starting allocation of 100 per cent, with high security receiving 0.97 megalitres per share, general security receiving an increase of 0.06 megalitres per share and conveyance 0.524 megalitres per share of entitlement.

(l) The forecast EWA account increases in line with the rules as set out in the water sharing plan. (m) This is the Lower Darling commitments to be delivered in 2014-15. This is zero when NSW is in control of Menindee Lakes (n) Remaining uncommitted water that is set aside for future increases to allocation. This volume is minimal and more an indication of

uncertainty about the data being used.



Note 1 – Allocation accounts

This note is reference for the volume held in the allocation accounts at the time of reporting and is also relevant for the various processes that occur to either increase or decrease an allocation account throughout the water year.

The volume of water that is in the licence allocation accounts at the time of reporting is a net balance for the relevant licence category and represents that water that can be carried forward to the next water year as dictated by the carryover rules in place for that year or required under the water sharing plan.

A negative number for the carryover figure indicates that more usage has occurred than has been allocated to the account, and the deficit must be carried forward to the next season.

Water that is in the accounts at the end of a water year but is not permitted to be carried over is forfeited and has been represented as a decrease in water liability.

The accounting presented is relevant to licence category and is therefore inclusive of licences held by environmental holders (these are also detailed separately in Note 6).

Data type

Derived from measured data

Policy

Water Sharing Plan for the New South Wales Murray and Lower Darling Regulated Rivers Water Sources 2003

Available on the NSW Office of Water website

Data accuracy

A1 – Nil inaccuracy +/- 0%

Providing agency

NSW Office of Water

Data source

State Water Corporation/NSW Office of Water – Water Accounting System (joint ownership)

Methodology

The carryover volume of water in the allocation account for each licence category is determined once all transactions and end of year forfeit rules have been applied. Below is list of typical transactions that can apply to an allocation account:

• Available Water Determination (AWD) (detailed in Note 2) • Allocation account usage (detailed in Note 3) • Forfeiture due to:

o No or limited carryover being permitted (End of Year Forfeit) o Account limit breaches o Evaporation reductions on carryover o Cancellation of licence

• Trade of allocation water between accounts (detailed in Note 4) • Determined carryover volume • Transfer snowy water savings (detailed in Note 20)




Additional information

The tables on the following page provide a balanced summary of the water allocation accounts for each category of access licence. Below is a description of each of the table components.

Table 4: Explanatory information for allocation account summary

Heading Description

Share This is the total volume of entitlement in the specific l icence category on the specified date.

Opening balance The volume of water that has been carried forward from previous years a l location account.

AWD – Available water determination The tota l annual volume of water added to the allocation account as a result of a l location assessments. This figure includes additional AWD made as a result of a s torage spill reset as defined in the water sharing plan.

Licences New Increase in account water as a result of the issuing of a new licence.

Cancelled Decrease in account water as a result of a license cancellation where account ba lance has not been traded to another license.

Assignments In Increase in account water as a result of temporary trade in.

Out Decrease in account water as a result of temporary trade out.

Transfer snowy water savings This is an adjust to account water as a result of Snowy water savings projects with a ll water held in assigned Snowy environmental licences on 31 January transferred to Snowy Hydro to be used in planning.

Account usage Volume of water that is extracted or diverted from the river and is accountable against the access l icense allocation

Forfeits During Year Account water forfeited throughout the year as a result of the accounting rules specified in the water sharing plan. Forfeited water may occur due to account limits being reached, conversions between license categories and various types of other license dealings. It a lso includes any reductions on carryover volumes due to storage evaporation as required by the water sharing plan.

End of year forfeit Account water that is forfeited at the end of the water year as a result of carryover rules that restrict the carry forward volume.

End of year balance Account ba lance that i s available to be taken at the conclusion of the water year.

Carry forward This represents the account water that is permitted to be carried forward into the next water year as determined by the carryover rules.

( ) Negative figures are shown in red brackets



Table 5: Allocation account balance summary for the NSW Murray regulated river 2013-14

Category Share

30 June 13 Share

30 June 14 Opening Balance AWD

Licences Assignments Transfer Snowy Water

Savings

Account usage

During Year

Forfeit

End of Year

Balance

End of Year

Forfeit

Carry Forward New Cancelled In Out

Domestic and Stock 13,861 13,793 (5) 13,861 0 14 0 0 0 8,460 0 5,383 5,389 (7)

Domestic and Stock [Domestic] 1,239 1,241 0 1,239 0 0 0 0 0 647 0 592 592 0

Domestic and Stock [Stock] 2,073 2,068 0 2,073 0 5 0 0 0 655 0 1,413 1,413 0

Loca l Water Utility 33,497 33,497 0 33,497 0 0 175 2,620 0 18,284 0 12,768 12,768 0

Conveyance 330,000 330,000 0 330,000 0 0 125,827 96,522 0 359,305 0 0 0 0

General Security11 1,670,202 1,672,097 193,258 1,613,214 0 0 289,502 625,800 31,881 933,943 0 504,350 18,071 486,279

High Security 187,541 187,595 (268) 187,541 0 0 55,091 124,546 0 102,845 0 14,972 15,160 (188)

High Security (Community and Education) 47 47 0 47 0 0 0 0 0 28 0 19 19 0

High Security (Research) 800 800 0 800 0 0 0 0 0 0 0 800 800 0

High Security (Town Water Supply) 3,195 3,195 0 3,195 0 0 0 0 0 3,195 0 0 0 0

Supplementary Water 252,424 252,579 0 252,579 0 0 948 948 0 137,103 0 115,477 115,477 0

11 This licence category has been adjust for Snow y Water Savings with all w ater held in assigned environmental licences on 31 January transferred to Snow y Hydro to be used in planning.



Note 2 – Available water determination (AWD) (allocation announcement)

This is the process by which the regulated surface water asset available for use within the regulated system is determined and shared. The process calculates the volume of water that is to be added to an individual’s licence allocation account. Announcements of allocations are made on a seasonal basis - usually corresponding with the financial year and are updated on a regular basis or following significant inflow events. Under the Water Management Act 2000 the announcements are termed available water determinations.

Data type

Derived from measured data.

Policy

Water Management Act 2000 (NSW).

• Chapter 3 – Part 2 Access Licences.

o Clause 59 – Available Water Determinations. Water Sharing Plan for the New South Wales Murray and Lower Darling Regulated Rivers Water Sources 2003

• Part 8 – Limits to the availability of water

o Division 2 – Available Water Determinations. Available on the NSW Office of Water website

Data accuracy


Providing agency

NSW Office of Water.

Methodology

The AWD procedure itself is generally divided into two sections; the available water asset, and system commitments. Once the required system commitments have been allowed for, the remaining water asset is then available for distribution to the access licence categories in order of priority (see following table). Announcements are expressed as either a percentage of the share component for all access licences where share components are specified as megalitres per year, or megalitres per unit share for all regulated river (high security) access licences, regulated river (general security) access licences and supplementary water access licences.

Table 6: Priority of access licence categories

Licence Category AWD Priority

General Security Low High Security High Conveyance Low Domestic and Stock 12 Very High Loca l Water Utility Very High

12 Domestic and Stock is further broken down into three sub categories: Domestic and Stock, Domestic and Stock (Domestic) and Domestic and Stock (Stock). For the purposes of this report and the general purpose w ater account they were all treated as Domestic and Stock.




Available Water Asset – this is calculated by summing the water currently available in storage, future (minimum) inflows to the system, and additional volumes due to recessions of inflows from the current levels to the minimum inflow levels. Also taken into consideration is the reduction of the total inflows to the system for those that arrive too late in the season to be useful.

System Commitments – this is an assessment of the existing commitments that have to be delivered from the Available Water Asset in either the current or future years. Key components include:

• essential supplies include things such as town water supplies, stock and domestic requirements, industrial use and permanent plantings (e.g. orchards, vineyards) and environmental allowances

• undelivered account water is the water that has already been allocated to accounts but yet to be provided

• end of system flow requirement is an estimate of the flow that to pass through the system as a result of operation of the system

• losses which are estimated as the amount of water that will be lost by the system either through evaporation or in the process of delivering the water via transmission losses

Available water determinations are limited to an equivalent volume of 100 per cent of share component (entitlement) for all categories other than general security. The sum of available water determinations for general security holders cannot exceed 1.1 megalitres per share. Additional information

Table 8 and Tab, present the allocation summary reports for 2013-14. Table 7 describes the terms used in the allocation summary reports.

Table 7: Allocation summary report notes

Report Heading Description

Opening Remaining allocation account balances at the conclusion of the previous season that is allowed to be carried forward to this season.

Individual announcement Actual announcement made to each licence category

Share component (Entitlement) Sum of the licensed volume of water within the licence category on the announcement date.

Al location announced volume Volume of water credited to accounts within a l icence category as a result of the announcement made.

Al location cumulative announced volume

Cumulative total of the announced volumes for the water year and licence category.

Al location announced volume % of share

This is the announced volume expressed as a percentage of the entitlement applicable on the particular date.

Al location cumulative announced volume % of share

This is the cumulative total percent (of total entitlement) that has been issued on the announcement date (inclusive)

Account ba lance available Sum of water available in allocation accounts that has been made available to be taken during the season.

Account ba lance not available Water a llocated that is not accessible at this point in time.

Account ba lance total Tota l balance of accounts (available plus not available)

Account ba lance available % of share Account ba lance available expressed as a percentage of share component.

Account ba lance total % of share Account ba lance expressed as a percentage of share component.

Supplementary water Water that i s not a s tored source of water and is only made available if an uncontrolled flow event occurs.



Table 8: Allocation announcements for the NSW Murray regulated river water source 2013-14

Date Individual announcement

Share component

Allocation Account balance

Announced volume

(ML)

Cumulative announced

volume (ML)

Announced volume

% of share

Cumulative Announced

volume % of share

Available (ML)

Not available

(ML)

Total (ML)

Available % of share

Total % of share

DOMESTIC AND STOCK

Opening 13,861 (5) 0 (5) 0 0

1-Jul -12 AWD 100.0 % 13,861 13,861 13,861 100 100 13,856 0 13,856 100 100

DOMESTIC AND STOCK(DOMESTIC)

Opening 1,239 0 0 0 0 0

1-Jul -12 AWD 100.0 % 1,239 1,239 1,239 100 100 1,239 0 1,239 100 100

DOMESTIC AND STOCK(STOCK)

Opening 2,073 0 0 0 0 0

1-Jul -12 AWD 100.0 % 2,073 2,073 2,073 100 100 2,073 0 2,073 100 100

LOCAL WATER UTILITY

Opening 33,497 0 0 0 0 0

1-Jul -12 AWD 100.0 % 33,497 33,497 33,497 100 100 33,497 0 33,497 100 100

REGULATED RIVER (CONVEYANCE)

Opening 330,000 0 0 0 0 0

1-Jul -13 AWD 0.6476 ML per Share 330,000 213,708 213,708 65 65 213,708 0 213,708 65 64

1-Aug-13 AWD 0.03 ML per Share 330,000 9,900 223,608 3 68 223,608 0 223,608 68 68

15-Aug-13 AWD 0.0427 ML per Share 330,000 14,091 237,699 4 72 237,699 0 237,699 72 72

2-Sep-13 AWD 0.1385 ML per Share 330,000 45,705 283,404 14 86 283,404 0 283,404 86 86

16-Sep-13 AWD 0.0801 ML per Share 330,000 26,433 309,837 8 94 309,837 0 309,837 94 94

1-Oct-13 AWD 0.0611 ML per Share 330,000 20,163 330,000 6 100 330,000 0 330,000 100 100



Table 7: Allocation announcements for the NSW Murray regulated river water source 2013-14 (continued)

Date Individual announcement

Share component

Allocation Account balance

Announced volume

(ML)

Cumulative announced

volume (ML)

Announced volume

% of share

Cumulative Announced

volume % of share

Available (ML)

Not available

(ML)

Total (ML)

Available % of share

Total % of share

REGULATED RIVER (GENERAL SECURITY)

Opening 1,671,890 209,199 0 209,199 13 13

1-Jul -13 AWD 0.38 ML per Share 1,671,890 635,396 635,396 38 38 844,595 0 844,595 51 51

1-Aug-13 AWD 0.08 ML per Share 1,672,097 133,768 769,164 8 46 978,363 0 978,363 59 59

15-Aug-13 AWD 0.11 ML per Share 1,672,097 183,936 953,100 11 57 1,162,299 0 1,162,299 70 70

2-Sep-13 AWD 0.22 ML per Share 1,672,097 344,149 1,297,249 21 78 1,506,448 0 1,506,448 90 90

16-Sep-13 AWD 0.12 ML per Share 1,672,097 176,354 1,473,603 11 88 1,682,802 0 1,682,802 101 101

1-Oct-13 AWD 0.09 ML per Share 1,672,097 126,858 1,600,460 8 96 1,809,659 0 1,809,659 108 108

REGULATED RIVER (HIGH SECURITY)

Opening 187,541 (268) 0 (268) (0.1) (0.1)



REGULATED RIVER (HIGH SECURITY)(COMMUNITY AND EDUCATION)

Opening 47 0 0 0 0 0

1-Jul -12 AWD 100 % 47 47 47 100 100 47 0 47 100 100

REGULATED RIVER (HIGH SECURITY)(RESEARCH)

Opening 800 0 0 0 0 0

1-Jul -12 AWD 100 % 800 800 800 100 100 800 0 800 100 100

REGULATED RIVER (HIGH SECURITY)(TOWN WATER SUPPLY)

Opening 3,195 0 0 0 0 0

1-Jul -12 AWD 100 % 3,195 3,195 3,195 100 100 3,195 0 3,195 100 100

SUPPLEMENTARY WATER

Opening 252,579 0 0 0 0 0




Note 3 – Allocation account usage

This is the volume of water that is extracted, diverted or measured as usage and is accountable against an access licence issued under the water sharing plan.

Data type

Measured/administration data

Policy


Data accuracy

A – Estimated in the range +/- 10%

Providing agency

NSW Office of Water, Murray Darling Basin Authority

Data source

State Water/NSW Office of Water – Water Accounting System (Joint ownership of system).

MDBA: Murray MDBA Monthly Report

Methodology

Usage information is determined by either on-farm meters that measure extraction, gauges on diversion works or orders/releases when the volume cannot be effectively metered, such as an environmental watering event.

Meter readings are collected for individual licence holders at intervals during the year and converted via a calibration factor to a volume of water extracted. Water diverted from the river is measured by recording the height at either the gauge or weir with the volume diverted being derived by passing these heights through a rating table. With potentially multiple categories of access licences being extracted through the same pumps additional information and methodologies are required to separate use under the various licence categories. Below is a description of these:

• Based on periods of announcement – during periods of supplementary water announcements extractions can be debited against the supplementary water licences

• Usage based on water orders – users place orders for water against an access licence and usages are debited against accounts in proportion to the orders placed.

• Licence category apportionment – if no water orders are available water extracted is apportioned against categories of access licence in order of priority as set out in the table below. The prioritising is based on the nature of and rules around each of the licence categories.

Victorian account usage obtained from the Murray Darling Basin Authority monthly reports.

The following table provides the order in which extractions are apportioned to access licence categories in the water accounting system. This is a generic list where not all categories will necessarily appear in this GPWAR. There are also various sub categories of licence associated with some of the categories.



Table 9: Licence category metered usage apportionment table

Priority Surface water

1 Supplementary

2 Uncontrolled Flow

3 Domestic and Stock

4 Regulated River High Security

5 Regulated River General Security

6 Conveyance

7 Loca l Water Utility

8 Major Water Utility

Table 10: Account usage summary 2013-14

Licence category Account usage (ML)

NSW Murray Victoria

Domestic and Stock 8,460

Domestic and Stock [Domestic] 647

Domestic and Stock [Stock] 655

Loca l Water Utility 18,284

Conveyance 359,305

General Security 933,943

High Security 102,845

High Security (Community and Education) 28

High Security (Research) 0

High Security (Town Water Supply) 3,195

Supplementary Water 137,103

Total Usage 1,564,464 1,432,490



Note 4 – Account Water Trading (allocation assignments)

This represents the temporary trading (allocation assignments) of water between allocation accounts within the regulated NSW Murray water source and between the NSW Murray licence holders and holders in external water sources.

Data type

Administration

Policy


• Part 10 Access licence dealing rules

o Clause 51 Rules relating to constraints within a water source o Clause 55 Rules for water allocation assignment between water sources o Clause 56 Rules for interstate assignment of water allocations o Available on the NSW Office of Water website

Data accuracy


Providing agency

NSW Office of Water

Data source

State Water/NSW Office of Water – Water Accounting System (joint ownership of system).

Methodology

Trading is permitted between certain categories of access licences and between certain water sources. This is detailed in the water sharing plan or stipulated under the licence holder’s conditions.

The net internal trade for each licence category is zero for a water year. As such, trades occur as both a water liability decrease (sellers of water) and a water liability increase (buyers of water).

Trade between water sources will either increase the committed liability for the year (trade into the Murray) or decrease the committed liability for the year (trade out of the NSW Murray). The imbalance created from trading to and from the Murray water source is monitored and managed with the intervalley trade account (see note 5).


The following table shows the internal and external trading figures between licence categories and water sources. All figures represent a volume in megalitres.




Figure 28: NSW Murray catchment allocation assignment summary 2013-14

Murray Trade Report 2013-14

Trade To/Buyer

Totals Murray Lower Darling Murrumbidgee

South Australia

Victoria Local Water Utility

Conveyance General Security

High Security

Supplementary General Security

High Security

General Security

High Security

Trad

e Fr

om/S

elle

r

Murray

Local Water Utility 175 0 2,280 165 0 0 0 0 0 0 0 2,620

Conveyance 0 0 15,260 0 0 8,886 0 845 1,155 70,032 344 96,522

General Security 0 124,404 170,879 20,010 0 74,213 272 22,738 2,247 128,314 82,725 625,800

High Security 0 1,424 38,779 12,694 0 11,514 180 22,294 533 6,531 30,598 124,546

Supplementary 0 0 0 0 948 0 0 0 0 0 0 948

Lower Darling General Security 654 338

992

High Security 1,031 100 1,131

Murrumbidgee General Security 47,693 16,641 64,334

High Security 2,587 2,784 5,371

South Australia 2,843 141 2,984

Victoria 7,496 2,218 9,714

Totals 175 125,827 289,502 55,091 948 94,613 452 45,877 3,935 204,877 113,666 934,962

Tota l Internal Trade = 387,018 megalitres

Tota l Trade out of NSW Murray = 463,420 megalitres

Tota l Trade into NSW Murray = 84,525 megalitres



Note 5 - Intervalley Trade Account (IVT)

The intervalley trade account provides ongoing tracking of valley debts and claims for water due to the temporary trading of account water between the southern connected valleys of the Murray Darling Basin.

For the NSW Murray this is presented in the accounting statements as an asset account whereby a positive balance is indicative of a claim to water (NSW Murray owed water), and a negative balance indicative of a future obligation (NSW Murray owes water).

Data type


Policy

Water Act 2007 (Federal)

The Murray Darling Basin Agreement (Schedule 1) – Transferring Water Entitlements and Allocations (Schedule D)

Water Management Act 2000 (NSW)

Dealings with access licences (Division 4)

- 71G Assignment of water allocations between access licences

- 71I Interstate assignment of water allocations


Part 10 Access licence dealing rules

- Clause 55 Rules for water allocation assignment between water sources

- Clause 56 Rules for interstate assignment of water allocations

Available on NSW Office of Water website at www.water.nsw.gov.au

Data accuracy


Providing agency

Murray Darling Basin Authority, NSW Office of Water

Data Sources

Murray Darling Basin Authority provided spreadsheet

State Water Corporation – Provided spreadsheet – CAIRO

NSW Office of Water – Water Accounting System – HYDSTRA

Methodology:

The balance of the IVT account is calculated by adjusting the carried forward balance of the IVT account from the previous year and applying a series of transactions (described in the additional information section below). A positive balance indicates that the Murrumbidgee



owes water to the Murray System while a negative balance indicates that Murray system owes water to the Murrumbidgee System.


The IVT trade balance summary table presented in Table 11 provides information compiled from the best information available at the time of publication. These figures may change in the future as updated information becomes available. All figures are in megalitres.

Table 11: Murray- Murrumbidgee inter-valley trade account summary

Water Year Ending 30 June

Starting Balance

Inter-valley Trading Murrumbidgee IVT Account Adjustments

IVT Closing Balance

Decreases Increases

Into Murrumbidgee

(1)

Out of Murrumbidgee

(2)

Net Into Murray

Via Snowy

(4)

Via Balranald

(3)

Net Tagged Trade

(5)

Finley Borrow (6)

2004-05 0 11,805 3,779 (8,026) 0 4,185 0 12,211 0

2005-06 0 16,646 21,748 5,102 0 20,282 0 10,162 (5,018)

2006-07 (5,018) 1,209 97,195 95,986 20,000 70,968 0 0 0

2007-08 0 2,729 141,825 139,096 0 63,500 0 728 76,324

2008-09 76,324 17,223 406,976 389,753 200,000 44,981 0 6,245 227,341

2009-10 227,341 55,659 166,443 110,784 200,000 119,567 0 5,318 23,876

2010-11 23,876 130,929 180,031 49,102 0 57,751 0 12,766 27,993

2011-12 27,993 85,062 151,880 66,818 78,000 12,083 0 965 5,693

2012-13 5,693 179,426 234,574 55,148 (39,000) 87,542 200 5,049 17,148

2013-14 17,148 59,917 180,850 120,933 0 40,282 0 1,389 99,188

Table 11 - IVT accounting descriptions

1. The volume of water traded into the Murrumbidgee Valley from the NSW Murray, NSW Lower Darling, Victoria or South Australia will result in the Murray IVT being decreased.

2. The volume of water traded out of the Murrumbidgee Valley to the NSW Murray, NSW Lower Darling, Victoria or South Australia will result in the Murray IVT being increased.

3. The Murray Darling Basin Authority (MDBA) requests that NSW deliver a proportion of the water that was traded to users outside of the Murrumbidgee. NSW supplies the requested volume and accounts for it by calculating the resulting addition volume of water passing the Murrumbidgee River at Balranald. The accounted volume supplied is agreed between State Water Corporation and MDBA and the Murray IVT account is decreased accordingly.

4. On occasion Snowy Hydro Limited may be requested to transfer a portion of either the Murrumbidgee or Murray Required Annual Release (RAR) to assist with the settlement of the IVT account when it gets too far out of balance (although there is no legal obligation on them to perform such releases). These are often referred to as "notional" releases. The following points illustrate this process: o Excessive Trade from Murrumbidgee to Murray creates a need to transfer

Murrumbidgee RAR via the Murray development thus decreasing the Murray IVT account (reducing Murrumbidgee debt to Murray).



o Excessive trade from Murray to Murrumbidgee creates a need to transfer Murray RAR via the Murrumbidgee development thus increasing the Murray IVT account (reducing Murray debt to Murrumbidgee).

5. Tagged trading is a dealing that occurs when a licence holder within a valley nominates to extract their allocation for that licence from a different water source. Any water delivered to a point of extraction within the Murrumbidgee to meet allocation associated with another water source therefore results in a decrease to the Murray IVT.

6. During periods of high summer demand transfers of water can occur from the Murray to the Murrumbidgee via Murray Irrigation Limited (MIL) infrastructure to bypass delivery constraints that can occur in the Yanco Creek System and the Coleambally Irrigation channel network. Water passed into the Murrumbidgee via MIL, subject to MIL ability to deliver via their channel system, can help to meet the demands in Billabong Creek. The net change in the IVT as a result is calculated by assessing the difference between the flow diverted from MIL to Billabong Creek (via Finley escape) and the water that leaves the Murrumbidgee via the Billabong Creek at Darlot for the corresponding period (i.e. estimating volume extracted by users on Billabong Creek). This figure is presented as ‘Finley Borrow’ in Table 11.



Note 6 – Held environmental water

This represents that environmental water that is held as part of a licensed volumetric entitlement. These licences are either purchased on the market by environmental agencies or issued as a result of water savings achieved through investment by those relevant agencies.

These licences are held within the same licence categories as all other water access licences hence are subject to the same operating rules. Therefore they are subject to the following key rules:

• Available Water Determinations (AWD) for their share of the entitlement to be added to accounts

• Carryover rules hence the forfeiting of unused water that cannot be carried over • Provide water orders prior to use.

These licences are used to provide environmental benefit and outcomes to the catchment by either providing water to, or supplementing water requirements of, a specific environmental events or incidents.

Data Type

Measured

Policy

Water Management Act 2000

• Dealings with access licences (Division 4)

o 71G Assignment of water allocations between access licences Water Sharing Plan for the New South Wales Murray and Lower Darling Regulated Rivers Water Sources 2003


Data accuracy

A1 – Estimated in the range +/- 10%

Providing agency

NSW Office of Water

Data source

State Water/NSW Office of Water – Water Accounting System (Joint ownership of System).

Methodology

The water held for the environment represents a volume of water in corresponding allocation accounts. This allocation account represents the sum of the remaining volume of held environmental water at the conclusion of the water year once all transactions and forfeit rules have been applied to the accounts. These environmental balances are at the licence category level and represent the water that can be carried forward for use in the next year. Below is list of typical transactions that can apply to an environmental allocation account:

• AWD (including pro rata of AWD for new licences) • Licensed extractions • Forfeiture due to:

o Carryover rules




o Account spillage as a result of AWD o Licence conversions o Excess orders (where water order debiting is in place)

• Trade of allocation water between accounts

In addition the trade and purchase of environmental water is tracked to capture the movement of environmental entitlement both in number of entitlements, and volume.


The table on the following page provides a summary of held environmental water for 2013-14.

Table 12: Explanatory information for Environmental Account Summary

Heading Description

Share This is the total volume of entitlement in the specific l icence category.

Opening balance The volume of water that has been carried forward from previous years a l location account.

AWD – Available water determination The tota l annual volume of water added to the allocation account as a result of a l location assessments. This figure includes additional AWD made as a result of a s torage spill reset as defined in the water sharing plan.

Licences New Increase in account water as a result of the issuing of a new licence.

Cancelled Decrease in account water as a result of a licence cancellation where account ba lance has not been traded to another licence.

Assignments In Increase in account water as a result of temporary trade in.

Out Decrease in account water as a result of temporary trade out.

Account usage Volume of water that is extracted or diverted from the river and is accountable against the access l icence allocation

Forfeits During Year Account water forfeited throughout the year as a result of the accounting rules specified in the water sharing plan. Forfeited water may occur due to account limits being reached, conversions between licence categories and various types of other licence dealings. It also includes any reductions on carryover volumes due to storage evaporation as required by the water sharing plan.

End of year forfeit Account water that is forfeited at the end of the water year as a result of carryover rules that restrict the carry forward volume.

End of year balance Account ba lance that i s available to be taken at the conclusion of the water year.

Carry forward This represents the account water that is permitted to be carried forward into the next water year as determined by the carryover rules.

( ) Negative figures are shown in red brackets



Table 13: NSW Murray regulated water source environmental account balance summary 2013-14

Licence Category Share as at

30 June 14

Opening Balance AWD

Licences Assignments 13 Transfer Snowy Water

Savings

Account usage

Forfeit End of Year

Balance

End of Year

Forfeit

Carry Forward14 New Cancelled In Out During

Year

Regulated River (Conveyance) 31,860 0 31,230 0 0 125,827 96,522 0 60,535 0 0 0 0

Regulated River (General Security) 267,692 11,313 258,099 0 0 79,897 219,405 31,881 23,251 0 74,771 84 74,687

Regulated River (General Security) - within MIL15 175,678 9,466 175,099 0 0 7,681 132,840 0 0 0 59,406 0 59,406

Regulated River (High Security) 22,334 0 15,872 0 0 0 15,811 0 0 0 61 61 0

Supplementary Water 100,211 0 100,211 0 0 0 0 0 0 0 100,211 100,211 0

Table 14: NSW Murray regulated water source environmental holding summary 2013-14

Licence Category Number of licences Share

30 June 13 30 June 14 Change 30 June 13 30 June 14 Change

Regulated River (Conveyance) 2 2 0 31,230 31,860 630

Regulated River (General Security) 23 24 1 254,557 267,692 13,135

Regulated River (General Security) - within MIL15 1 1 0 174,899 175,678 779

Regulated River (High Security) 17 15 -2 15,703 22,334 6,631

Supplementary Water 5 5 0 100,056 100,211 155

13 No Allocation Assignments to CEWH from other MIL Holders in 2013-14. 14 Carry forward volume uses actual opening balances from 01/07/2013, not potential carryover. 15 Water held by the Commonw ealth Environmental Water Holder (CEWH) that form part of the Murray Irrigation Limited (MIL) general security licence.



Note 7 – Environmental provisions

There a number of planned environmental provisions allowed for within the regulated NSW Murray water source, implemented under the water sharing plan, with the aim of enhancing environmental benefits.

A long-term extraction limit A long term extraction limit is set in place that ensures the growth in diversions is contained and the requirements set out under schedule F of the Murray Darling Basin agreement are maintained. If long term average annual diversions exceed this limit, provisions are in place to implement a reduction in the available water determinations until the average diversions are bought back under the required limit.

Barmah-Millewa Environmental Water Allowance (B-M EWA) and Overdraw An environmental water allowance and overdraw availability has been established for the Barmah-Millewa forest and other wetlands and to increase the frequency of high flows during spring and early summer in the Murray River. These rules are designed to complement those applied by Victoria.

The B-M EWA provides a volume of up to 75,000 megalitres each year to build up a reserve of planned environmental water, up to a maximum of 350,000 megalitres, for the maintenance of the Barmah-Millewa forest. In addition under certain conditions water in the B-M EWA account can be borrowed by regulated Murray water source access licences holders with the borrow being paid back when sufficient water becomes available.

The Barmah-Millewa overdraw provides a volume of up to 50,000 megalitres per water year to provide water to Barmah-Millewa forest provided that sufficient water reserves are available to NSW so as not to constrain Available Water Determinations to any of the licence categories under the Plan.

Water in either of the B-M EWA or overdraw accounts is made available from Hume Dam to provide environmentally beneficial outcomes for the Barmah-Millewa forest, in accordance with any relevant inter-state agreements.

For details on rules relating to the management of these accounts in relation to crediting of water, carryover and forfeit rules refer to water sharing plan.

Murray Additional Environmental Allowance (AEA) Releases from the Murray AEA may be made for any environmental purpose consistent with objectives as set out in the water sharing plan. The allowance may be credited annually with up to 0.03 megalitres while accumulating a maximum of up to 0.15 megalitres per share of high security entitlement. For details on rules relating to the management of this account refer to water sharing plan.

Adaptive Environmental Water Access Licences Two access licences with a total share component of 32,027 unit shares were established as consequence of the Murray Irrigation Limited privatisation arrangements (30,000 megalitres conveyance licence) and water savings resulting from works installed to regulate inflows to Moira Lake (2,027 megalitres high security licence). These licences form part of the held environmental entitlement described in Note 6.



Data type

Measured/Administration

Policy


• Part 3 Environmental Water Provisions


Data accuracy


Providing agency

NSW Office of Water

Data source

State Water/NSW Office of Water – Water Accounting System (Joint ownership of System).

State water annual compliance report (internal document)


Performance against long term extraction limit

Performance against long term extraction limit is to be undertaken at the end of each water year, using the hydrologic computer model that is approved by the NSW Office of Water for assessing long-term water extraction from the water source. For more detail on this refer to the water sharing plan.

Environmental Water Allowance and Overdraw

No B-M EWA or Overdraw was used in 2013-14 to meet environmental requirements. In addition conditions did not allow water to be borrowed for the B-M EWA for use by regulated licence holders in the NSW Murray water source.

Barma-Millewa Overdraw has not been required since commencement of the water sharing plan in 2004-05.

Murray Additional Environmental Allowance

No AEA was used in 2013-14 or has been required to meet environmental requirements since the commencement of the water sharing plan in 2004-05.




Table 15: Barma-Millewa Environmental Allowance16

Water Year Borrow

Carryover Account

Carryover Credits Spill Use Evaporation

Forfeit Account Balance Borrow

Borrow Repay

Borrow Account Available

2004-05 175,000 175,000 50,000 0 0 0 225,000 50,000 0 225,000 0

2005-06 225,000 225,000 75,000 0 256,450 0 43,550 50,000 275,000 0 43,550

2006-07 0 43,550 47,500 0 0 0 91,050 91,050 0 91,050 0

2007-08 91,050 91,050 21,500 0 0 0 112,550 21,500 0 112,550 0

2008-09 112,550 112,550 17,500 0 0 0 130,050 17,500 0 130,050 0

2009-10 130,050 130,050 50,000 0 0 0 180,050 50,000 0 180,050 0

2010-11 180,050 180,050 50,000 0 134,500 720 94,830 48,500 228,550 0 94,830

2011-12 0 94,830 75,000 0 139,800 0 30,030 0 0 0 30,030

2012-13 0 30,030 75,000 0 0 850 104,180 0 0 0 104,180

2013-14 0 104,180 75,000 79,180 0 2,520 97,480 0 0 0 97,480

Table 16: Additional Environmental allowance

Water Year CarryOver HS Share AWD reached 0.97ML/Share Credit Use Spill Account

Limit Forfeit Balance

2004-05 0 179,478 Yes 5,384 0 0 0 5,384

2005-06 5,384 180,065 Yes 5,402 0 0 0 10,786

2006-07 10,786 181,031 Yes 5,431 0 0 0 16,217

2007-08 16,217 181,103 No 0 0 0 0 16,217

2008-09 16,217 183,504 Yes 5,505 0 0 0 21,722

2009-10 21,722 183,534 Yes 5,506 0 0 0 27,228

2010-11 27,228 187,541 Yes 5,626 0 28,131 4,723 0

2011-12 0 187,541 Yes 5,626 0 0 0 5,626

2012-13 5,626 187,392 Yes 5,622 0 0 0 11,248

2013-14 11,248 187,541 Yes 5,626 0 0 0 16,874

16 The numbers in the table vary from last year’s follow ing the clarif ication of the interpretation of the accounting rules in the w ater sharing plan.



Note 8 – Surface water storage

This is the actual volume of water stored in the individual surface water storages at the date of reporting. The volumes provided represent the total volume of water in the storage, including dead storage which is the volume of water which can’t be accessed under normal operating conditions e.g. volume below low level outlet. It is assumed that the dead storage can be accessed if required via alternative access methods e.g. syphons.

Data type


Policy

Not applicable

Data accuracy


Providing agency

NSW Office of Water

Data source

NSW Office of Water – HYDSTRA

Methodology

Storage volumes are calculated by processing a gauged storage elevation through a rating table that converts it to a volume.


Table 17: Storage summary table

Name Capacity (ML) Dead storage (ML) % change 2013-14

Hume Dam 3,005,156 1,790 12

Dartmouth Dam 4,056,896 91,190 4

Menindee Lakes 1,730,886 215,690 50

Lake Victoria 677,000 100,000 11

Lake Mulwala 117,500 NA 10

Torrumbarry Weir 36,810 NA 0

For plots of storage behaviour for 2013-14, including volumes and percentages, see Figure 12, Figure 13, Figure 14 and Figure 15 earlier in this report.



Note 9 – River channel storage

The volume of water stored in the river channel on the day of reporting.

Policy

Not applicable

Data type


Data accuracy

B – Estimated in the range +/- 25%

Providing agency

Murray darling Basin Authority

Data sources

Murray MDBA Monthly Summary Spreadsheet

Methodology

Calculated as part of the MDBA Murray Flow Model using the following methodology.

For each river section S(n):

V = Q x T

The river channel storage will be equal to the sum of all river section volumes.

River channel storage = ∑ S(n) V

Table 18: Summary of river channel storage calculation components

Symbol Variable Unit

Q Average flow in the river section. Ca lculated by averaging the daily flows at the upstream and downstream river gauges.

ML/d

V Volume in each river section. ML

T Average travel time for a parcel of water to travel through the river section. days

Assumptions and approximations:

• Travel times are estimated to the nearest day. • Daily flow change between gauging sites assumed to be linear.



Note 10 - Snowy required annual release

Snowy Hydro Limited operates under a May to April accounting year which is different to the water accounting period being considered in this report. Hence this note will cover both the Snowy RAR and those adjusted to represent the reporting period.

Snowy Hydro Limited provides an annual fixed minimal accountable release, known as the Required Annual Release (RAR) to the Murray (1,062,000 megalitres per year). However, in years of severe drought when the current inflow sequence is worse (drier) than the historical dry sequence, Snowy Hydro delivery of the RAR could put the Snowy Scheme at risk of running out of water. In those years the RAR may be reduced by the Dry Inflow Sequence Volume (DISV) being the measure of the cumulative difference between the historic dry sequence and the current inflow sequence. Any shortfall in the delivery of the DISV will be repaid in the future when annual inflows improve.

Further adjustments to the RAR can also be made each year as a result of pre-releases made in the previous year or for water savings in the Murray that have been dedicated to Snowy River environmental flows. The RAR and those items that adjust it are monitored continually and updated whenever changes in the catchment dictate it.

The Delivered RAR is assessed as being the sum of:

• Actual Releases from Murray 1 Power Station • Total Montane Release

Montane release is environmental water to support the high altitude streams that have been impacted by the Snowy Mountains Scheme. It is diverted to Hume Dam catchment with the majority lost before reaching the Dam (hence not separated out in statements for the Hume Dam inflows). Hence the figure used for the accountable portion of Hume Dam inflows in the accounting statements excludes Montane releases.

Policy

Snowy Water Licence 2010

Data type


Data accuracy


Providing agency

NSW Office of Water

Data sources

Snowy Mountains Authority Water Operations Report

Methodology

Snowy Accounting Year (May – April)

RAR deliverable for Snowy–Murray Development is calculated as being:

• Annual Fixed RAR • plus DISV as at 1 March (previous water year) • less Water savings Allocated to Snowy Tumut



• less Pre Release (previous water year)

The Adjusted RAR for Snowy–Murray Development is calculated as being:

• RAR Deliverable • less DISV on 1 March (water year) • less RAR Permitted shortfalls and relaxations • less Murray-Murrumbidgee Intervalley Transfer Settlement

Total RAR Delivered = Adjusted RAR plus Pre Release (next water year) plus Above Target Release less Relaxation Volume Payback

Reporting Period (July – June)

RAR Inflow to Hume = Delivered RAR Less Montane release (July – June)

Additional Information

The following tables provide detail into the calculation of the Snowy-Murray RAR as well as the water delivered under RAR for the July-June water year.

Table 19: Snowy-Murray RAR summary table Snowy-Murray RAR 2013-14 Summary

1 May 2013 to 30 April 2014 Component Volume (ML)

Annual Fixed RAR 1,062,000

Annual Al location Water Savings 2012-13 -114,000

DISV 1 March 2013 0

Pre Releases for 2013-14 -240,000

Total RAR 2013-14 (as at 1 May 2014) 708,000

DISV 1 March 2014 0

Intervalley Transfer to Murray 0

Relaxation Volume Call Out from 2012-13 0

Within Year Release for Above Target Water 2012-13 114,000

Adjusted RAR Target Release 2013-14 822,000

Pre Release for 2013-14 168,000

Above Target Release 0

Relaxation Volume 0

Total RAR Delivered 990,000

Snowy-Murray RAR Accounting to 1 July 2014

Component Volume (ML)

Annual Fixed RAR 1,062,000

Annual Al location Water Savings 2013-14 -115,000

DISV 1 March 2014 0

Pre Release for 2014-15 -168,000

Relaxation Volume 0

Snowy l icence Shortfall Payback 0

Total RAR 2014-15 (as at 1 May 2014) 779,000

DISV 1 July 2014 0

Estimate 2014-15 RAR (as at 1 July 2014) 779,000

RAR Del ivered 1 May 2014 to 30 June 2014 -155,700

Outstanding RAR to be Delivered (as at 1 July 2014) 623,300



Annual Snowy-Murray RAR Delivery Summary

1 July 2012 to 30 June 2014

Component Volume (ML)

1 July 2012 to 30 June 2013

RAR Del ivered 1,266,000

Montane release -16,000

RAR Inflow to Hume 1,250,000 1 July 2013 to 30 June 2014

RAR Del ivered 816,600

Montane release -20,700

RAR Inflow to Hume 795,900



Note 11 – Storage inflow

Storage inflow refers to the volume of water flowing into the major headwater storages – Hume Dam, Dartmouth Dam, Menindee Lakes and Lake Victoria.

Policy

Not applicable

Data type


Data accuracy


Providing agency

NSW Office of Water

Data sources

NSW Office of Water: HYDSTRA, Integrated Quantity and Quality Model (IQQM)

Methodology

In most of the major storages in NSW there is no direct measurement of inflows. However, it is possible to calculate inflows by using a mass balance approach (based on balancing the change in storage volume) where inflow is the only unknown. This is referred to a backcalculation of inflows.

The backcalculation figures were derived using a one day time step with the inflow calculated according to the equation below. The daily inflows are then summed to provide an annual inflow figure.

I = ΔS + O + Se + ((E * Kp – R) * A)/100

Table 20: Components for backcalculation of inflow Symbol Variable Unit I Inflow ML/day ΔS Change in storage volume ML O Outflow ML/day Se Seepage ML/day R Rainfall mm/day E Evaporation mm/day Kp Pan evaporation factor A Surface area - derived from height to surface areas lookup curve ha

For plots of daily storage inflows refer to Figure 8, Figure 9, Figure 10 and Figure 11 earlier in this report.

Assumptions and approximations:

• Constant storage specific pan evaporation factors are applied (one annual factor). • Seepage was assumed to be zero



Note 12 – Storage evaporation and storage rainfall

This refers to the volume of water effective on Hume Dam, Dartmouth Dam, Menindee Lakes and Lake Victoria that is either lost as a result of evaporation, or gained as a result of rainfall.

Data type


Policy

Not applicable

Data accuracy

B – Estimated in the range +/- 25%

Providing agency

NSW Office of Water, Murray Darling Basin Authority, State Water Corporation

Data source

HYDSTRA, Bureau of Meteorology website, CAIRO

Methodology

In order to calculate rainfall and evaporation firstly the daily time-series of storage surface area is computed via a height to area lookup curve as defined in HYDSTRA. Daily rainfall and evaporation data is then applied to the area time-series to achieve a volume in megalitres which is then aggregated to an annual figure. A pan factor is applied to the evaporation data.

Rainfall: Volume (ML) = Rainfall (mm) x Area (m2) x 10-6

Evaporation: Volume (ML) = Pan Evaporation (mm) x Pan Factor x Area (m2) x 10-6


Table 21: Summary of storage evaporation and rainfall 2013-14

Storage Rainfall (ML) Evaporation (ML)

Hume Dam 103,498 205,329

Dartmouth Dam 65,137 77,459

Menindee Lakes 42,516 631,243

Lake Victoria 30,356 232,946



Note 13 – River evaporation and river rainfall

This refers to the volume of water effective on the accounted river reach that is either lost as a result of evaporation, or gained as a result of rainfall.

Data type


Policy

Not applicable

Data accuracy

C – Estimated in the range +/- 50%

Providing agency

NSW Office of Water

Data source

NSW Office of Water: HYDSTRA, ARCGIS

QLD Department of Natural Resources: SILO

Methodology

The volume applied for evaporation and rainfall on the regulated river is achieved by first calculating a daily time-series of river area. This is achieved by breaking the river up into reaches and utilising the cross sections recorded at river gauging locations to determine the average width of the river with a given daily flow. River length is then determined between two gauging locations using ARCGIS and as such an area for each reach can be defined.

Area (m2) = Average W (m) x L (m)

Where W is the daily width determined from the gauging cross sections and L is the length as determined through ARCGIS analysis.

With daily area determined, various climate stations are then selected based on their proximity to each river reach. Rainfall and evaporation data is then extracted from SILO and applied to the area time-series to achieve a volume in megalitres which is then aggregated to an annual figure.

Rainfall: Volume (ML) = Rainfall (mm) x Area (m2) x 10-6

Evaporation: Volume (ML) = ET0 (mm) x Kc x Area (m2) x 10-6

Where ET0 = reference evapotranspiration from SILO and Kc = crop factor for open water (1.05)


Table 22: Rainfall and evaporation summary table

NSW Murray River - Rainfall and Evaporation 2012-13 2013-14

Tota l Murray River System Tota l Ra in 53,314 65,115

Tota l Evaporation 169,333 164,188



Note 14 – Gauged tributary inflow

The inflow into the regulated river that occurs downstream of the headwater storages that is measured at gauging stations.

Policy

Not applicable

Data type

Measured data

Data accuracy


Providing agency

NSW Office of Water

Data sources

NSW Office of Water: HYDSTRA

MDBA: Murray MDBA Monthly Report

Methodology

The flows are obtained by measuring river heights at gauging stations along the river, and then passing these heights through a rating table that converts them to a daily flow volume.


The total gauged inflow for 2013-14 is the sum of the inflows for the gauged tributaries defined in the table below.

Table 23: Summary of NSW Murray gauged tributary inflow 2013-14

Station code Station name Volume (ML)

Victoria Murray Gauged Tributary Inflows

Kiewa River 577,720

Ovens River 1,421,150

Goulburn, Broken & Campaspe Rivers 1,085,070

Torrumbarry Return Flow 234,210

Total Victorian gauged tributary inflow 3,318,150

NSW Murray Tributary Inflows

410003 Murrumbidgee River at Balranald 348,470

410134 Bi l labong Creek at Darlot 107,839

425007 Darl ing River at Burtundy 233,124

Total NSW gauged tributary inflow 689,432

Total Murray Gauged Tributary Inflow 4,007,582



Table 24: NSW daily tributary inflow to Murray 2013-14

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,5001-

Jul-1

3

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Flow

(ML/

d)

Billabong Ck @ Darlot Murrumbidgee Rv @ Balranald Darling River @ Burtundy

Figure 29: Victorian daily tributary inflow to Murray 2013-14

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Flow

(ML/

d)

Kiewa River Goulburn River Broken Creek Campaspe Riverr Ovens River



Note 15 – Ungauged runoff estimate

The inflow into the river that occurs downstream of the headwater storages that is not measured.

Policy

Not applicable

Data type

Estimated

Data accuracy

C – Estimated in the range +/- 50 per cent

Providing agency

NSW Office of Water

Data sources

NA

Methodology

For the purpose of this account it was assumed that ungauged runoff was minimal and therefore assumed to be zero.



Note 16 – Dam releases, river inflow from dam releases

The volume of water released from Hume Dam, Dartmouth Dam and Lake Victoria storages. In the accounting process this release is represented as both a decrease in asset (of the dam) and an equal increase in asset (of the river).

It should be noted that the volume entering the Murray as a result of Menindee Lakes is provided as a gauged tributary inflow recorded at the Darling River at Burtundy and can be seen in Note 14.

Policy

Not applicable

Data type

Measured data

Data accuracy


Providing agency

Murray Darling Basin Authority

Data sources

Murray Darling Basin Authority – provided spreadsheets

Methodology

The flows are obtained by measuring river heights at a gauging station downstream of the dam wall, and then passing these heights through a rating table that converts them to a daily flow volume. The releases have been represented in the Statement of Changes in Water Assets and Water Liabilities as both a decrease in water asset (water leaving the dam) and an equal volume of increase in water asset (water released increasing the volume of the river). It would have been also possible to account this as a transfer in asset whereby the volumes would not appear in the statements.


Figure 30: Hume Dam releases 2013-14

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Rele

ase

(ML/

day)



Figure 31: Dartmouth Dam releases 2013-14

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Rele

ase

(ML/

day)

Figure 32: Lake Victoria Dam releases 2013-14

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Rele

ase

(ML/

day)



Note 17 – End of system / Flow leaving

This refers to flow that leaves the entity and does not return to the entity. For the NSW Murray the end of system represents the flow to South Australia. Flows leaving are represented by water diverted from the Murray to Murrumbidgee via Finley Escape.

A minimum flow contribution of 1,850,000 megalitres per year is required to be provided to the South Australian Border as per the Murray Darling Basin Agreement. In addition when defined storage volume triggers are exceeded South Australia is entitled to additional dilution flows of 3,000 megalitres per day, 1,500 megalitres of which is from NSW resource. For more details refer to Water Sharing Plan

Data type Derived from measured data

Policy Water Sharing Plan for the New South Wales Murray and Lower Darling Regulated Rivers Water Sources 2003

• Appendix 5 - Operational guidelines for delivering flows prescribed by the Murray Darling Basin Agreement

Data accuracy A – Estimated in the range +/- 10%

Providing agency Murray Darling Basin Authority

Data source MDBA: Murray MDBA Monthly Report

MDBA: Website

Methodology Summation of flows at gauging site/s measuring the volume of water that leaves the entity at end of system locations or via regulated effluents. For the NSW Murray reporting entity the end of system flow is derived using the following methodology:

• Flow at Murray River @ D/S Rufus River (4260200) plus • Diversion to Mulleroo Creek D/S Offtake (Above Lock 7) (414211A) less • Lindsay River Allowance (250 ML/day)

The gauges used record a time series of heights which are then converted to a volume of water based on a derived ‘height to flow’ relationship (rating table).


Table 25: End of System Flows

Station name 2013-14 outflow (ML)

NSW Murray Flow to South Australia 1,222,820

Victoria Murray Flow to South Australia 2,339,090

Total Murray River Flow to South Australia 3,561,910

Finley escape 13,001

http://www.legislation.nsw.gov.au/fragview/inforce/subordleg+186+2003+app.5+0+N?tocnav=y

http://www.legislation.nsw.gov.au/fragview/inforce/subordleg+186+2003+app.5+0+N?tocnav=y



Figure 33: End of system flow to South Australia 2013-14

0

5,000

10,000

15,000

20,000

25,000

30,000

1-Ju

l-13

1-Au

g-13

1-Se

p-13

1-O

ct-1

3

1-N

ov-1

3

1-De

c-13

1-Ja

n-14

1-Fe

b-14

1-M

ar-1

4

1-Ap

r-14

1-M

ay-1

4

1-Ju

n-14

1-Ju

l-14

Flow

(ML/

day)



Note 18 – NSW Extractions from river

This is the actual volume of water directly pumped or diverted from the regulated river by licence holders. Occasionally (generally in the case of environmental water) volumes are ordered against a licence account for in-stream benefits or to pass through end of system target points. As such the volume reported to be physically extracted from the accounted river extent will not always be equal to the amount of water debited against accounts for usage, which has been described in Note 3. The volume stated for extractions from river excludes basic rights extractions, which is reported as a separate line item and detailed in Note 21.

Data type

Measured data

Policy

Not applicable

Data accuracy


Providing agency

NSW Office of Water

Data source


Methodology

For the purposes of this GPWAR extraction from the river is considered to be the total volume metered and debited to the allocation accounts minus any licenced account water that can be identified as being used within the system, or ordered to be passed through the system. These volumes are generally associated with environmental water orders and have already been accounted for in other line items.


Table 26: Reconciliation of physical extraction to account usage (ML)

NSW Murray

Licenced extractions from River 17 1,564,464 plus Licenced flow leaving System 18 0 plus In s tream licenced usage 19 0 equals Tota l account usage 20 1,564,464

17 Direct licenced extractions from the river excluding basic rights usage estimate 18 Licenced w ater ordered to leave the accounted NSW Murray extent for environmental benefits 19 Water ordered and used w ithin the accounted system for environmental benefit (not extracted from the river) 20 The total amount of w ater accounted for usage against the allocation accounts



Note 19 – Victoria extractions

The volume of water extracted from the accounted river extent by Victorian licence holders. While detailed information is not available within this account, it is necessary to include the bulk figures extracted to maintain the integrity of the river physical mass balance. Total volumes extracted in megalitres have been provided as a total for all licence categories.

Data type

Measured data

Policy

Water Amendment Act 2008

Available at the Australian Government ComLaw webpage (http://www.comlaw.gov.au)

Data Accuracy


Providing Agency

Murray Darling Basin Authority

Data Source

Murray MDBA Monthly Summary Spreadsheet

Methodology

N/A

http://www.comlaw.gov.au/



Note 20 – Snowy water savings transfer

This represents the water transfer annually to Snowy Hydro for use to improve river health and deliver environmental benefits in the Snowy and Murray Rivers. The licensed entitlement, held by the NSW government, was created as a result of water savings projects. These licences are subject to the same rules and regulations as all other access licences within the same category.

Data Type

Administration

Policy

Snowy Water Inquiry Outcomes Implementation Deed (SWIOID)

Snowy Water Licence (October 2011)


Data accuracy


Providing agency

NSW Office of Water

Data source

State Water/NSW Office of Water – Water Accounting System (joint ownership of system).

Methodology

The water is transferred to an account that is managed by Snowy Hydro for use in the following season. The volume of account water transferred each year is all the account water in the allocation accounts of the water savings licences as at 31 January each year. With the accounting process to reduce the NSW required annual release in the following year by the equivalent amount; Snowy Hydro can then incorporate this into their annual operating plan for the following year. Any water crediting these water accounts after 31 January via AWD or allocation trade must be allowed to be carried over and becomes part of the water that is transferred in the following year. It is import to note that the transfer of water on 31 January should not result in any reduction in the total volume of water that these licenses are entitled to as a result of accounting rules around carryover and limits. As such accounting adjustments are required to ensure this.

For this report figures quoted are the result of detailed reworking of the individual water allocation accounts and therefore may not match those quoted in other sources which do not include future adjustments that are made.




Note 21 – Basic rights extractions

This is the non-licensed right to extract water to meet basic requirements for household purposes (non-commercial uses in and around the house and garden) and for watering of stock. It is available for anyone who has access to river frontage on their property.

This water cannot be used for irrigating crops or garden produce that will be sold or bartered, for washing down machinery sheds or for intensive livestock operations.

In times of limited supply, there may be restrictions on taking water for domestic and stock use.

Data Type

Estimated

Policy


• Part 4 Basic Landholder Rights o Clause 18 Domestic and stock rights


Data accuracy

C – Estimated in the range +/- 50%

Providing agency

NSW Office of Water

Data source


Methodology

The estimation of domestic and stock rights uses a series of estimates for water usage, stocking rates, population and property shape based on local knowledge to calculate riparian (stock and domestic) requirements in megalitres per year. The annual extraction for Domestic and Stock rights in the water accounts is assumed to be the estimated figure stated in the Water Sharing Plan for the New South Wales Murray and Lower Darling Regulated Rivers Water Sources 2003 (2,118 megalitres).




Note 22 – Supplementary extractions

This is the volume of water extracted or diverted under supplementary access licences during announced periods of supplementary water. Supplementary flow events are announced periodically during the season when high flow events occur with the period of extraction and volume of water to be extracted determined based on the rules as set out in the water sharing plans. It is important to note that supplementary access licences differ from other categories of access licence in that the volume of water in the account refers to an annual upper limit for extractions and its provision is totally reliant on the occurrence of high flow events.

Data type

Measured data

Policy


Part 8 Limits to the availability of water

Division 2 - Available water determinations - Clause 40 Available water determinations for supplementary water access

licences Part 9 Rules for managing access licences

Division 3 - Extraction conditions - Clause 49 Extraction under supplementary water access licences

Refer to applicable Water Sharing Plan on NSW Office of Water website

Data accuracy

A - Estimated in the range +/- 10%

Providing agency

NSW Office of Water

Data source


Methodology

Supplementary water extraction and diversion data is collected by either on farm meters that measure extraction or gauges on diversion works. Meter readings are collected for individual licence holders at intervals during the year and converted via a calibration factor to a volume of water extracted. Water diverted from the river is measured by recording the height at either the gauge or weir with the volume diverted being derived by passing these heights through a rating table. However, with supplementary water being extracted through the same pumps as those extracting water under other categories of access licences additional information is required to separate out supplementary extraction. Basically licence holders provide notification of their intention to pump prior to pumping or diverting water during the declared supplementary event and provide meter readings both at the commencement and conclusion of pumping. This enables the supplementary flow extraction to be assessed independent of other categories of access licences.





Table 27: NSW Murray supplementary events summary 2013-14

Event Period: 17 July 2013 to 30 September 2013

Event Limit: 100% or 1.0 megal i tres per Share Announcement Date: 17 July 13 Catchment Section Start Date End Date

Dry Lake Dry Lake 17-Jul -13 17-Sep-13

Lake Benanee Lake Benanee 17-Jul -13 17-Sep-13 Murray River Wakool to Euston Weir 17-Jul -13 17-Sep-13

Gol Gol North Creek Gol Gol North Creek 17-Jul -13 17-Sep-13

Gol Gol Creek Gol Gol Creek 17-Jul -13 17-Sep-13

Washpen Creek Washpen Creek 17-Jul -13 17-Sep-13

Unnamed Watercourse Lara Creek 17-Jul -13 17-Sep-13

Ruel Lagoon Ruel Lagoon 17-Jul -13 17-Sep-13

Ta l lys Lake Ta l ly's Lake 23-Jul -13 17-Sep-13

Murray River Euston Weir to Mildura 17-Jul -13 17-Sep-13

Buronga Billabong Buronga Billabong 17-Jul -13 17-Sep-13

Murray River Hume to Yarrawonga 23-Jul -13 10-Sep-13

Bul langinya Lagoon Bul langinya Lagoon 23-Jul -13 10-Sep-13

Darl ing River Went. Pool Wentworth Weir Pool 17-Jul -13 17-Sep-13

Tuckers Creek Tuckers Creek 17-Jul -13 17-Sep-13

Sa l t Creek Sa l t Creek 17-Jul -13 17-Sep-13

Lake Victoria Lake Victoria 17-Jul -13 17-Sep-13 Frenchmans Creek Frenchmans Creek 17-Jul -13 17-Sep-13

Murray River Mi ldura to South Australia 17-Jul -13 17-Sep-13

Unnamed Watercourse Unnamed Watercourse (Off the Murray) 17-Jul -13 17-Sep-13

Unnamed Watercourse Unnamed Watercourse 23-Jul -13 17-Sep-13

Col lendina Lagoon Col lerdina Lagoon 23-Jul -13 10-Sep-13

Dairy Lagoon Dairy 23-Jul -13 10-Sep-13

Dights Creek Dights Creek 23-Jul -13 10-Sep-13

Jingera Jingera Lagoon Jingera Jingera 23-Jul -13 10-Sep-13

Lake Mulwala Lake Mulwala 23-Jul -13 10-Sep-13

Unnamed Watercourse Unnamed Watercourse (Off Murray River) 23-Jul -13 10-Sep-13

Paddock Lagoon Paddock Lagoon 23-Jul -13 10-Sep-13

Lesters Lagoon Lesters Lagoon 23-Jul -13 10-Sep-13

Murray River Yarrawonga to Edward Offtake 23-Jul -13 10-Sep-13

Moira Creek Moira 23-Jul -13 10-Sep-13

Murray River Barmah to Torrumbarry 23-Jul -13 14-Sep-13 Murray River Torrumbarry to Wakool Junction 23-Jul -13 17-Sep-13

Li ttle Murray River Li ttle Murray 23-Jul -13 17-Sep-13

Barbers Creek Barbers Creek 23-Jul -13 17-Sep-13

Merran Creek Cuttings to Franklings Bridge 23-Jul -13 17-Sep-13

Coobool Creek Coobool Creek 23-Jul -13 17-Sep-13

Waddy Creek Waddy Creek 23-Jul -13 17-Sep-13

Gum Creek Gum Creek 23-Jul -13 17-Sep-13

Larrys Creek Larrys Creek 23-Jul -13 17-Sep-13

Mul l igans Creek Mul l igans Creek 23-Jul -13 17-Sep-13



St Helena Creek St Helena Creek 23-Jul -13 17-Sep-13

Niemur River Offtake to Moulamein Rd 31-Jul -13 10-Sep-13

Bookit Creek Bookit Creek 13-Aug-13 17-Sep-13

Merribit Creek Merribit Ck 13-Aug-13 17-Sep-13

Porthole Creek Porthole Creek 13-Aug-13 17-Sep-13

Gulpa Creek Gulpa Creek 17-Jul -13 10-Sep-13

Edward River Offtake to Toonalook 23-Jul -13 10-Sep-13

Edward River Toonalook to Stevens 23-Jul -13 10-Sep-13

Deep Creek Deep Creek 23-Jul -13 14-Sep-13

Edward River Stevens to Moulamein 23-Jul -13 17-Sep-13

Edward River Moulamein to Liewah 23-Jul -13 17-Sep-13

Merangatuk Creek Merangatuk Ck 13-Aug-13 17-Sep-13

Edward River Liewah to Wakool Junction 23-Jul -13 17-Sep-13

Wakool River Stoney Xing to Murray Junction 13-Aug-13 17-Sep-13

Col l igen Creek Weir to Werai Station 31-Jul -13 10-Sep-13 Niemur River Mal lan School to Wakool Confluence 7-Aug-13 17-Sep-13

Ya l lakool Creek Ya l lakool 7-Aug-13 10-Sep-13

Col l igen Creek Offtake to Weir 23-Jul -13 10-Sep-13

Niemur River Moulamein Road to Mallan School 7-Aug-13 17-Sep-13

Murray River Edward offtake to Barmah 23-Jul -13 10-Sep-13

Wakool River Moulamein Road to Gee Gee 13-Aug-13 17-Sep-13

Wakool River Gee Gee to Coonamit 13-Aug-13 17-Sep-13

Wakool River Coonamit to Stoney Xing 13-Aug-13 17-Sep-13

Merran Creek Franklings Bridge to Moulamein Road 23-Jul -13 17-Sep-13

Merran Creek Moulamein Road to Upstream Wakool Junction 23-Jul -13 17-Sep-13

Merran Creek Upstream Wakool Junction to Wakool Confluence 23-Jul -13 17-Sep-13

Unnamed Watercourse Unnamed watercourse (Off Edward River) 23-Jul -13 10-Sep-13

Event Period: 07 August 2013 to 30 September 2013

Event Limit: 100% or 1.0 megal i tre per Share

Announcement Date: 7 August 2013

Catchment Section Start Date End Date

Wakool River Brassi Rd to Wakool Road 7-Aug-13 10-Sep-13

Event Period: 07 August 2013 to 30 September 2013

Event Limit: 100% or 1.0 megal i tre per Share

Announcement Date: 7 August 2013


Wakool River Wakool Road to Moulamein 7-Aug-13 10-Sep-13



Event Period: 18 September 2013 to 31 October 2013

Event Limit: 100% or 1.0 ML per Share

Announcement Date: 17 September 2013


Murray River Wakool to Euston Weir 1-Jul -12 21-Oct-12

Murray River Hume Dam 18-Sep-13 27-Sep-13

Ta l lys Lake Ta l ly's Lake 18-Sep-13 4-Oct-13

Murray River Wakool to Euston Weir 18-Sep-13 15-Oct-13 Dry Lake Dry Lake 18-Sep-13 15-Oct-13

Ruel Lagoon Ruel Lagoon 18-Sep-13 15-Oct-13

Lake Benanee Lake Benanee 18-Sep-13 15-Oct-13

Gol Gol North Creek Gol Gol North Creek 18-Sep-13 15-Oct-13

Washpen Creek Washpen Creek 18-Sep-13 15-Oct-13

Gol Gol Creek Gol Gol Creek 18-Sep-13 15-Oct-13

Unnamed Watercourse Lara Creek 18-Sep-13 15-Oct-13

Murray River Euston Weir to Mildura 18-Sep-13 15-Oct-13

Buronga Billabong Buronga Billabong 18-Sep-13 27-Oct-13

Bul langinya Lagoon Bul langinya Lagoon 18-Sep-13 29-Sep-13

Murray River Hume to Yarrawonga 18-Sep-13 27-Sep-13

Murray River Mi ldura to South Australia 18-Sep-13 27-Oct-13

Sa l t Creek Sa l t Creek 18-Sep-13 27-Oct-13

Tuckers Creek Tuckers Creek 18-Sep-13 27-Oct-13

Unnamed Watercourse Unnamed Watercourse 18-Sep-13 27-Sep-13 Unnamed Watercourse Unnamed Watercourse (Off the Murray) 18-Sep-13 27-Oct-13

Darl ing River Went. Pool Wentworth Weir Pool 18-Sep-13 15-Oct-13

Frenchmans Creek Frenchmans Creek 18-Sep-13 24-Oct-13

Lake Victoria Lake Victoria 18-Sep-13 24-Oct-13

Col lendina Lagoon Col lerdina Lagoon 18-Sep-13 27-Sep-13

Dairy Lagoon Dairy 18-Sep-13 27-Sep-13

Dights Creek Dights Creek 18-Sep-13 27-Sep-13

Jingera Jingera Lagoon Jingera Jingera 18-Sep-13 27-Sep-13

Lake Mulwala Lake Mulwala 18-Sep-13 27-Sep-13

Unnamed Watercourse Unnamed Watercourse (Off Murray River) 18-Sep-13 27-Sep-13

Paddock Lagoon Paddock Lagoon 18-Sep-13 29-Sep-13

Lesters Lagoon Lesters Lagoon 18-Sep-13 29-Sep-13

Murray River Yarrawonga to Edward Offtake 18-Sep-13 29-Sep-13

Moira Creek Moira 18-Sep-13 29-Sep-13

Bul latale Creek Bul latale Creek 18-Sep-13 29-Sep-13 Murray River Barmah to Torrumbarry 18-Sep-13 2-Oct-13

Murray River Torrumbarry to Wakool Junction 18-Sep-13 5-Oct-13

Li ttle Murray River Li ttle Murray 18-Sep-13 5-Oct-13

Barbers Creek Barbers Creek 18-Sep-13 4-Oct-13

Merran Creek Cuttings to Franklings Bridge 18-Sep-13 4-Oct-13

Coobool Creek Coobool Creek 18-Sep-13 4-Oct-13

Waddy Creek Waddy Creek 18-Sep-13 4-Oct-13

Gum Creek Gum Creek 18-Sep-13 4-Oct-13



Larrys Creek Larrys Creek 18-Sep-13 4-Oct-13

Mul l igans Creek Mul l igans Creek 18-Sep-13 4-Oct-13

St Helena Creek St Helena Creek 18-Sep-13 4-Oct-13

Niemur River Offtake to Moulamein Rd 18-Sep-13 11-Oct-13

Wakool River Brassi Road to Wakool Road 18-Sep-13 11-Oct-13

Merribit Creek Merribit Ck 18-Sep-13 11-Oct-13

Bookit Creek Bookit Creek 18-Sep-13 11-Oct-13

Porthole Creek Porthole Creek 18-Sep-13 11-Oct-13

Gulpa Creek Gulpa Creek 18-Sep-13 2-Oct-13

Edward River Offtake to Toonalook 18-Sep-13 2-Oct-13

Edward River Toonalook to Stevens 18-Sep-13 2-Oct-13

Deep Creek Deep Creek 18-Sep-13 2-Oct-13

Edward River Stevens to Moulamein 18-Sep-13 4-Oct-13

Edward River Moulamein to Liewah 18-Sep-13 4-Oct-13

Merangatuk Creek Merangatuk Creek 18-Sep-13 11-Oct-13 Wakool River Offtake to Brassi Road 18-Sep-13 11-Oct-13

Edward River Liewah to Wakool Junction 18-Sep-13 4-Oct-13

Wakool River Stoney Xing to Murray Junction 18-Sep-13 14-Oct-13

Col l igen Creek Weir to Werai Station 18-Sep-13 11-Oct-13

Niemur River Mal lan School to Wakool Confluence 18-Sep-13 11-Oct-13

Ya l lakool Creek Ya l lakool 18-Sep-13 8-Oct-13

Unnamed Watercourse Unnamed Watercourse (Off Colligen) 18-Sep-13 4-Oct-13

Niemur River Moulamein Road to Mallan School 18-Sep-13 11-Oct-13

Wakool River Wakool Road to Moulamein Road 18-Sep-13 11-Oct-13

Murray River Edward offtake to Barmah 18-Sep-13 2-Oct-13

Wakool River Moulamein Road to Gee Gee 18-Sep-13 14-Oct-13

Wakool River Gee Gee to Coonamit 18-Sep-13 14-Oct-13

Wakool River Coonamit to Stoney Xing 18-Sep-13 14-Oct-13

Merran Creek Franklings Bridge to Moulamein Road 18-Sep-13 4-Oct-13

Merran Creek Moulamein Road to Upstream Wakool Junction 18-Sep-13 4-Oct-13 Merran Creek Upstream Wakool Junction to Wakool Confluence 18-Sep-13 4-Oct-13

Unnamed Watercourse Unnamed watercourse (Off Edward River) 18-Sep-13 4-Oct-13

Figure 34: Total monthly supplementary usage in the NSW Murray 2013-14

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun

Mon

thly

Sup

plem

enta

ry U

sage

(ML)



Figure 35: NSW Murray supplementary usage by river section 2013-14

15

23

24

25

27

40

54

72

82

101

109

113

120

133

186

230

267

283

445

462

519

521

742

872

900

1,163

2,359

4,976

28,479

93,881

0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 100,000 110,000

Wakool- Wakool Rd to Moulamein RdWakool- Moulamein Rd to Gee Gee

Murray- Yarrawonga to Edward OfftakeNiemur- Mallan School to Wakool Confluence

Edward- Gulpa CreekWakool- Brassi Rd to Wakool Rd

Murray- Gum CreekNiemur- Offtake to Moulamein Rd

Wakool- Merribit CkMurray- St Helena CreekMurray- Mulligans Creek

Wakool- Gee Gee to CoonamitMurray- Coobool Creek

Wakool- Coonamit to Stoney XingMurray- Wakool to Euston Weir

YallakoolNiemur- Moulamein Rd to Mallan School

Edward- Liewah to Wakool JunctionMerran Creek- Moulamein Rd to U/S Wakool…

Murray- Wentworth Weir PoolEdward- Moulamein to Liewah

Murray- MoiraMerran Creek- Franklings Bridge to Moulamein Rd

Wakool- Stoney Xing to Murray JunctionMurray- Barmah to torrumbarryEdward- Stevens to Moulamein

Murray- Torrumbarry to Wakool JunctionMurray-Unnamed Watercourse (Off Murray River)

Colligen- Offtake to WeirMurray- Lake Mulwala

Supplementary Water Usage (ML)Total Annual Supplementary Usage = 137,222



Note 23 – Unaccounted difference

In theory if all the processes of a water balance could be accurately accounted for the unaccounted difference would be zero. In reality due to the large uncertainties in many of the volumes presented in the accounts, the various sources from which the data has been obtained and the fact that not all processes of the water cycle have been accounted, the statements are not balanced at the end of the accounting process. In order to balance the accounts a final balancing entry is required, and this is termed the unaccounted difference. As technology progresses and accuracy improves in the account estimates, it is anticipated that relatively, this figure should reduce in future accounts.

Data type

Not applicable

Policy

Not applicable

Data accuracy

D – Estimated in the range +/- 100%

Providing agency

Not applicable

Data source

Not applicable

Methodology

The unaccounted difference is equal to the amount required to obtain the correct volume in river at the end of the reporting period, after all the known physical inflows and outflows have been accounted. The double-entry accounting process attempted to represent the physical movement of water by creating a river asset. The opening and closing balance of the river volume was estimated according to Note 9.

Surface Water Unaccounted difference

UVSW = Rs – Rc + RI - Ro Where:

UVSW = Unaccounted difference for Surface Water

Rs = Opening river volume estimate

Rc = Closing river volume estimate

Ro = Physical outflows from the river (e.g. extractions)

RI = Physical inflows to the river (e.g. runoff, return flows, dam releases)



Appendix 1 - Groundwater



Groundwater Management Groundwater management for the area bounded by the NSW Murray surface water accounting extent is covered by seven water sharing plans21 and all or part of 9 of the groundwater sources within these plans (detailed in Table 28 below). The Water Sharing Plans provide long term average annual extraction limits for each water source within the plans which determine the maximum volume of water that may be extracted under access licences and pursuant to domestic and stock rights and native title rights from each groundwater source on a long-term average annual basis.

Groundwater sources often cross multiple surface water catchment areas and hence only part of them reside in the NSW Murray. The percentage of the groundwater source within the catchment can be seen in Table 29.

Table 28: NSW Murray groundwater water sharing plan summary

Water sharing plan Water sources applicable for the

NSW Murray Catchment Date commenced Expires

Water Sharing Plan for the Barwon-Darl ing Unregulated and Alluvial Water Sources 2012 Upper Darl ing Al luvia l 4 October 2012 30 June 2023

Water Sharing Plan for the Lower Murray-Darl ing Unregulated and Al luvia l Water

Sources 2011 Lower Darl ing Al luvia l 30 January 2012 30 June 2022

Water Sharing Plan for the Lower Murray Groundwater Source

Lower Murray 1 November 2006 30 June 2017

Water Sharing Plan for the Lower Murray Shal low Groundwater Source 2012

Lower Murray Shal low 1 Apri l 2012 30 June 2022

Water Sharing Plan for the Murray Unregulated and Alluvial Water Sources 2011

Upper Murray 30 January 2012 30 June 2022

NSW Murray Darl ing Bas in Fractured Rock Groundwater Sources 2011

Adela ide Fold Bel t MDB 16 January 2012 30 June 2022 Kanmantoo Fold Bel t MDB

Lachlan Fold Bel t MDB NSW Murray Darl ing Bas in Porous Rock

Groundwater Sources 2011 Western Murray Porous Rock 16 January 2012 30 June 2022

A spatial representation of the areas covered by each of the water sharing plans can be seen in Figure 36 below. This shows that a number of groundwater water sharing plans overlay the same surface area due to the varying depths of the aquifers within the catchment.

21 By the 4th October 2012 the last of the groundw ater plans were implemented for the NSW Murray catchment. Up until this date those not yet covered by a plan continued to operate under the Water Act 1912. Water sharing plan status is show n at time of publication.



Figure 36: NSW Murray surface water catchment – groundwater water sharing plans



Groundwater Availability In 2013-14, all groundwater licences in the NSW Murray were granted an equivalent allocation of 1 megalitre per share, with the exception of Supplementary access licences (in the Lower Murray Groundwater Source).

In the Lower Murray Groundwater Source supplementary licences received an available water determination (AWD) of 0.4 megalitres per share. Under the terms set out in the Water Sharing Plan for the Lower Murray Groundwater Source the available water determination for supplementary licences is reduced each year by 0.2 megalitres per share commencing in 2011-12. This means the AWD will be zero for these licences by 2015-16. The purpose of this licence category was to reduce entitlements to a sustainable level over time allowing affected users to adapt to these changes.



Table 29: NSW Murray surface water catchment groundwater sources summary table

Groundwater Source Long Term Annual Extraction Limit (ML/Year)22

Licence Category Share (ML)

% of Share Component Announced 2013-14

Water Source % within the NSW Murray Surface Water accounting extent

Metered Usage 2013-14 (Total for water source)

Water Sharing Plan for the Barwon-Darling Unregulated and Alluvial Water Sources 2012

Upper Darling Alluvial (Groundwater Source)

17,120 Domestic and Stock Rights23 2,283 N/A

3 N/A

Local Water Utility 220 100 0 Salinity and water table management 3,300 100 0

Water Sharing Plan for the Lower Murray-Darling Unregulated and Alluvial Water Sources 2011

Lower Darling Alluvial 1,529 Domestic and Stock Rights23 730 N/A

100 N/A

Aquifer 928 100 1 Water Sharing Plan for the Lower Murray Groundwater Source

Lower Murray 83,700

Domestic and Stock Rights23 1,525 N/A

78

N/A Local Water Utility 12 100 13 Aquifer 84,388 100 32,573 Aquifer [Research] 0 100 0 Aquifer [Town Water Supply] 67 100 9 Supplementary 47,782 40 11,066

Water Sharing Plan for the Lower Murray Shallow Groundwater Source 2012

Lower Murray Shallow 81,893

Domestic and Stock Rights23 988 N/A

78

N/A Aquifer 61,741 100 3,259 Aquifer [Town Water Supply] 87 100 11 Salinity and water table management 20,010 100 0

Water Sharing Plan for the Murray Unregulated and Alluvial Water Sources 2011

Upper Murray 14,109

Domestic and Stock Rights23 402 N/A

76

N/A Local Water Utility 59 100 26 Aquifer 41,027 100 10,193 Aquifer [Town Water Supply] 92 100 38

22 Extraction limits stated may exclude w ater for basic rights, and water allocated to supplementary licences. Check w ith the relevant w ater sharing plan for details. 23 Domestic and Stock Rights are not a licenced entitlement and therefore do not have an allocation announcement associated w ith them. The value in the table for share is that volume estimated in the w ater sharing plans for each of the water sources



Table 28: NSW Murray surface water catchment groundwater sources summary table (continued) Groundwater Source Long Term Annual

Extraction Limit (ML/Year)24

Licence Category Share (ML)

% of Share Component Announced 2013-14

Water Source % within the NSW Murray Surface Water accounting extent

Metered Usage 2013-14 (Total for water source)

Water Sharing Plan for the NSW Murray Darling Basin Fractured Rock Groundwater Sources 2011

Adelaide Fold Belt MDB 26,018 Domestic and Stock Rights25 2,143 N/A 100 N/A Aquifer 2,161 100 0

Kanmantoo Fold Belt MDB 121,524 Domestic and Stock Rights25 8,154 N/A

72 N/A

Aquifer 769 100 500 Local Water Utility 5 100 0

Lachlan Fold Belt MDB 875,652


5

N/A Local Water Utility 2,207 100 102 Aquifer 64,303 100 5,250 Aquifer (Town Water Supply) 547 100 36 Salinity and Water Table Management 236 100 0

Water Sharing Plan for the NSW Murray Darling Basin Porous Rock Groundwater Sources 2011

Western Murray Porous Rock 530,486


92

N/A Local Water Utility 0 100 0 Aquifer 21,572 100 6,166 Salinity and Water Table Management 10,700 100 0

24 Extraction limits stated may exclude w ater for basic rights, and water allocated to supplementary licences. Check w ith the relevant w ater sharing plan for details. 25 Domestic and Stock Rights are not a licenced entitlement and therefore do not have an allocation announcement associated w ith them. The value in the table for share is that volume estimated in the w ater sharing plans for each of the water sources



Physical Groundwater Flows The following section provides information on physical groundwater flows.

For the NSW Murray groundwater sources there are no planning models available, and there is insufficient monitoring bore data (no Victorian data available) to estimate a complete budget, therefore the NSW Office of Water’s soil water budget accounting method was applied to obtain an estimate of the potential recharge for 2013-14. This method uses daily grid physical and climatic information to estimate a recharge via a basic book keeping technique that tracks the balance between the inflow of water from precipitation and the outflow of water by evapotranspiration, stream flow and drainage (potential groundwater recharge). A detailed description of this method is available in ‘General Purpose Water Accounting Reports - Groundwater methodologies’ (referred to as method C) and can be accessed via the NSW Office of Water website. This method provided the information for a comparison of both the potential annual recharge deviation from the historical long term mean (Figure 37) and the annual potential recharges (see Figure 38). This indicates that for 2013-14 potential recharge was about average across the majority of the catchment with the exception of the upper Murray where recharge was higher than average resulting from rainfall on wet catchment in July, August and June.

It is important to note that the data presented is modelled data and hence its accuracy cannot be guaranteed. Care should be taken if using this data outside the context of this report.

Figure 37: Potential recharge deviation non-modelled areas 2013-14




Figure 38: NSW Murray catchment, non-modelled areas annual potential recharge (1971-72 to 2013-14)

0

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

3,500,000

1971

-72

1973

-74

1975

-76

1977

-78

1979

-80

1981

-82

1983

-84

1985

-86

1987

-88

1989

-90

1991

-92

1993

-94

1995

-96

1997

-98

1999

-00

2001

-02

2003

-04

2005

-06

2007

-08

2009

-10

2011

-12

2013

-14

Pote

ntia

l Rec

harg

e (M

L)

1971-72 to 2012-13 Potential Recharge 2013-14 Potential Recharge Mean

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