14th & 15th August 2019

NSW MDB Fractured Rock Groundwater Status Update

MDB Fractured Rock Groundwater Status Update

• MDB SDL Groundwater Resource

Units • Number of registered works &

bore distribution • Measured usage against WSP

and SDL extraction limits. • Groundwater monitoring • Water trading • Dealing Impact Assessment

Criteria • Questions

Fractured Rock Systems

Source – Department of Water Resources State of California – “Groundwater in Fractured Rock Aquifers - Well Location, Yield and Sustainability”. https://www.watereducation.org/sites/main/files/file-attachments/fractured_rock_aquifers_kirk.pdf

Conceptual model of groundwater systems

Water Supply Bores in WRP Area

SDL Resource Unit Basic Rights Production Bores Local Water Utility Total

Adelaide Fold Belt (GS10) 92 15 0 107

Kanmantoo Fold Belt (GS19) 426 1 1 428

Lachlan Fold Belt (GS20) 18,110 1,024 31 19,165

New England Fold Belt (GS37) 3,106 97 9 3,212

Inverell Basalt (GS18) 997 39 0 1035

Liverpool Ranges Basalt (GS22) 514 11 0 525 Orange Basalt (GS39)

1,152 170 10 1,332

Warrumbungle Basalt (GS49) 132 3 0 135

Young Granite (GS51) 636 155 12 803

Total 25,165 1,515 63 26,742

Measured Usage, SDL and WSP LTAAEL extraction limits.

SDL Resource Unit

Groundwater Source

SDL volume (ML/yr)

LTAAEL (ML/yr)

Aquifer Access Share Component (unit shares)

Town Water / Water

Utility Share Component

(ML/yr)

Salinity and Water Table

Management (ML/yr)

Stock and Domestic

Access (ML/yr)

Average Annual

Extraction (ML/yr)

Adelaide Fold Belt (GS10)

Adelaide Fold Belt MDB 6,900 26,018 3,627 0 0 0 No data

Kanmantoo Fold Belt (GS19)

Kanmantoo Fold Belt

MDB 18,700 121,524 750 5 5 5 500

Lachlan Fold Belt (GS20)

Lachlan Fold Belt MDB --- 875,652 66,871 2838 236 0 4,244

Yass Catchment --- 26,163 2941.5 258 0 3 406

TOTAL 259,000 901,815 69812.5 3096 236 3 4650

New England Fold Belt (GS37)

New England Fold Belt

MDB --- 204,784 9057 614 0 0 122

Measured Usage, SDL and WSP LTAAEL extraction limits

SDL Resource Unit

Groundwater Source

SDL volume (ML/yr)

LTAAEL (ML/yr)

Aquifer Access Share

Component (unit

shares)

Town Water / Water Utility Share

Component (ML/yr)

Salinity and Water Table

Management (ML/yr)

Stock and Domestic

Access (ML/yr)

Average Annual

Extraction (ML/yr)

Inverell Basalt (GS18)

Inverell Basalt 4,150 25,807 3,382 0 0 0 324

Liverpool Ranges Basalt

(GS22)

Liverpool Ranges Basalt MDB

2,160 19,075 422

0 0 0 13

Orange Basalt (GS39) Orange Basalt 10,700 16,208

9,561

250 0 0 550

Warrumbungle Basalt (GS49)

Warrumbungle Basalt

550 5,710 71 0 0 0 No data

Young Granite (GS51) Young Granite 7,110 9,529 6,368 0 0 0 1,030

Young Granite – Measured usage against WSP Extraction Limit

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

2011

-12

2012

-13

2013

-14

2014

-15

2015

-16

2016

-17

2017

-18

2018

-19

Take

Vol

ume

(ML)

metered take(ie take from GW)

BLR

NSW WSP Extraction Limit

SDL Volume

Orange Basalt – Measured usage against WSP Extraction Limit

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20,000

2011

-12

2012

-13

2013

-14

2014

-15

2015

-16

2016

-17

2017

-18

2018

-19

Take

Vol

ume

(ML)

metered take… BLR

NSW WSP Extraction Limit

SDL Volume

Temporary Trade 71T dealings over 3 years

SDL Resource Unit 2014-2015 Yr 2015-2016 Yr 2016-2017 Yr

Adelaide Fold Belt (GS10) 0 0 0

Kanmantoo Fold Belt (GS19) 0 0 0

Lachlan Fold Belt* (GS20) 3 trades (216 ML) 6 trades (475 ML) 6 trades (271 ML)

New England Fold + Belt (GS37) 1 trade (28 ML) 1 trade(10 ML) 0

Inverell Basalt (GS18) 0 0 0

Temporary Trade 71T dealings over 3 years

SDL Resource Unit 2014-2015 Yr 2015-2016 Yr 2016-2017 Yr

Liverpool Ranges Basalt (GS22)

0 0 0

Orange Basalt (GS39)

1 trade (140 ML) 1 trade (50 ML) 1 trade (190 ML)

Warrumbungle Basalt (GS49)

0 0 0

Young Granite (GS51)

0 0 2 trades (37 ML)

Department Groundwater Monitoring

Department Groundwater Monitoring

00.5

11.5

22.5

33.5

44.5

5

Gro

undw

ater

Lev

el (m

bel

ow g

roun

d)

Date

GW085109

0

1

2

3

4

5

6

Gro

undw

ater

Lev

el (m

bel

ow g

roun

d)

Date

GW085107

Yass Catchment Monitoring

02468

101214161820

Gro

undw

ater

Lev

el (m

bel

ow g

roun

d)

Date

GW085113

Department Groundwater Monitoring

Site GW096082 Lachlan Fold Belt Located near Mudgee

Department Groundwater Monitoring

Site GW096091 Orange Basalt Located near Orange

Department Groundwater Monitoring

Site GW0403607 Young Granite Located near Young

Questions

John Williams

Impact Assessment Criteria – Confined Systems

Impact on water table (unconfined systems)

Impact on groundwater pressure (confined/semi-confined systems)

1. An additional drawdown of not more than 10% of the pre-development Total Available Drawdown above the base of the water source to a maximum of 2 m at any:

a. 3rd or higher order surface water source measured at 40 m from the high bank, or

b. Groundwater Dependant Ecosystem identified in the water sharing plan, or

c. water supply works (excluding those on the same property) subject to negotiation with impacted parties.

1. An additional drawdown of not more than 10% of the pre-development Total Available Drawdown (TAD) above the base of the water source to a maximum of 3 metres at any water supply works (excluding those on the same property), subject to negotiation with impacted parties.

Impact Assessment Criteria – Unconfined System Impact on aquifer and nearest neighbour rules

Impact on surface water and impact on GDE / culturally significant site

Impact Assessment Criteria – Rivers/Creeks/GDES