richmond river - roscco...waternsw current storage status •toonumbar: 12 sept 2020 •storage...
TRANSCRIPT
14 October 2020
Richmond River - ROSCCo
(River Operations Stakeholder Consultation Committee)
WaterNSW
Recent Rainfall1 April to 30 Sept 20
2
WaterNSW
Rainfall decile1 April to 30 Sept 20
3
WaterNSW
Drought Inflow Comparison
4
0
5
10
15
20
25
30
35
40
45
50
0 6 12 18 24
Cu
mu
lati
ve In
flo
ws in
GL
No. of Months
Comparison of Drought Inflows - Toonumbar Dam (Drought Inflows for 24 Months Starting in July)
July 1914 - Jun1916 July 2014 - Jun 2016 July 2004 - June 2006
July 2018 - July 2020 Drought of Record Current Drought July 2019-Oct2020
WaterNSW
Current Storage Status
• Toonumbar: 12 Sept 2020
• Storage Volume: 7,026 ML
• Storage Percent: 63.9%
• Dam Inflows since 1July20 – 12 Sept 20: 450 ML
• Currently Releasing : ~ 15 ML/d
5
WaterNSW
Historic Storage Behaviour
0
20
40
60
80
100
120
Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May June
Sto
rage
Per
cen
t (%
)
Toonumbar Storage Behaviour
2003/04 2018/19 2019/20 2020/21
6
Drought continued for more
than 6 months and recovered in
middle of summer
WaterNSW
Toonumbar - Historic Inflows
0
50
100
150
200
250
18
92
-93
18
95
-96
18
98
-99
19
01
-02
19
04
-05
19
07
-08
19
10
-11
19
13
-14
19
16
-17
19
19
-20
19
22
-23
19
25
-26
19
28
-29
19
31
-32
19
34
-35
19
37
-38
19
40
-41
19
43
-44
19
46
-47
19
49
-50
19
52
-53
19
55
-56
19
58
-59
19
61
-62
19
64
-65
19
67
-68
19
70
-71
19
73
-74
19
76
-77
19
79
-80
19
82
-83
19
85
-85
19
88
-89
19
91
-92
19
94
-95
19
97
-98
20
00
-01
20
03
-04
20
06
-07
20
09
-10
20
12
-13
20
15
-16
20
18
-19
Infl
ow
s (G
L)
Inflows (GL)
Median
7
WaterNSW
Richmond System Inflows
0
50
100
150
200
250
300
350
400
2014-15 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
Inflo
ws
(GL)
Richmond Valley Inflows
Toonumbar Dam Richmond River at Kyogle
8 GL
8
WaterNSW
Account Balance30 Sept 2020
Licence Category
Sum of Share Component Sum of AWD Vol
Sum of Allocation Assignments In
Sum of Allocation Assignments Out Sum of Usage
Sum of Account Balance
DOMESTIC AND STOCK [DOMESTIC] 6 6 0 0 0 6
DOMESTIC AND STOCK [STOCK] 8 8 0 0 0 8
REGULATED RIVER (GENERAL SECURITY) 9,531 9,531 0 0 222 9,100
REGULATED RIVER (HIGH SECURITY) 123 123 0 0 10 113
Grand Total 9,668 9,668 0 0 232 9227
9
WaterNSW
Delivery Efficiency - end Sept 2020
10
Metered Usage, 232ML, 32%
Unaccounted Difference, 487 ML,
68%
Water Balance end Sept 2020-21
BLRS&DOperational TargetEssential Requirement
Total Release: 719 ML
WaterNSW
Storage Forecast
11
WaterNSW
Rainfall Outlook
12
Nov – Jan 21
WaterNSW
• Current usage and future water requirements.
• Discussion on how to get through to June22.
• Measures required to be taken in 20-21 and 21-22 to get through to June 22, if
dry conditions persists in summer months or beyond.
• General discussion
Discussion
13
WaterNSW14
WaterNSW
Stage Water quantity Water quality
Stage 1
Normal managementContinue to deliver water as normal
Raw water can be treated
with usual methods
Stage 2
Emerging water shortage
Operational surface water measures to conserve supplies
Potential or actual impacts on groundwater
Minor adjustments to treat raw water
Stage 3
Severe water shortage
Restrictions on water for:
∙ High priority licences
∙ General security licences
Unacceptable groundwater impacts
Major adjustments are needed to treat raw water
Stage 4
Critical water shortage
Water only available for critical human
needs
Restrictions on all licences
Risk to long term availability of the
groundwater resources
Not possible to treat raw
water with standard
processes
Raw water likely to remain
untreatable over the longer term
Extreme event stages
15
WaterNSW
Visit the website at:
waternsw.com.au/drought For information on the Macquarie Valley including water availability reports and drought reports go to: waternsw.com.au/supply/drought-information/regional-nsw/macquarie-valley
Call us on:
1300 662 077
Subscribe at:
waternsw.com.au/subscribeFor weekly customer drought updates and more information
To keep updated
16
WaterNSW
Thank you for joining us
today
WaterNSW17