allocation update NSW Murrumbidgee regulated water sources - - PowerPoint PPT Presentation

Gwydir Regulated River Resource Management & Allocations

Department of Planning, Industry and Environment Water by Priyantha Jayakody 28 November 2019

NSW Murrumbidgee regulated water sources

Water Availability – Current status & allocation update

This Talk

• Inflow
• Climate
• Status of current water resources
• Transmission losses
• Water availability outlook

Page 2

Page 3

Murrumbidgee System Inflows (1968-2019)

Page 4

(Excluding Snowy Scheme Transfers)

Water Year Inflow Volume (GL) Rank 2006/07 257 1 2018/19 501 2 2008/09 552 3 2007/08 595 4 1982/83 681 5 2019/20 340 ?

Worst 5 years from 1890

Page 5

NSW Water Allocation - Approach

• Government assumes an extremely dry outlook
• Low risk
• Requirements codified in Water Sharing Plan
• Priority of access to water (towns, domestic, stock, …)
• End of system flow requirements
• Planned Environmental allowances
• Annual accounting (July - June)

Page 6

NSW Water Allocation - Approach

Page 7

Page 8

Allocation update as of 15 November 2019

Page 9

BJ BL Wagga Balranald Darlot

340 869 EOS=74 GL

Total inflow =474 GL

25 GL 25 GL Operational requirement = 475

Current commitments Carryover, IVT, EWA Account/s, TWS, Domestic & Stock, High Security ,Conveyancing

Total commitment=1023

CI MI Snowy

Resource Distribution 15 November 2019

Page 10

Volume GL Volume GL Total resources 1848 Less Total operational requirements 475 Current commitments 1023 Equals Water available 350 Less Water being set aside for next year’s high priority needs (Towns, D&S, HS, Conveyance). 350

Page 11

https://www.industry.nsw.gov.au/water/allocations- availability/allocations/statements

Murrumbidgee resource distribution 2019-20 –15 November 2019

e-water 40* GL consumptive use 112 GL Rules-based Env water 120 GL Conveyance 265 GL High Security 348 GL (95%) Towns, S&D 74 GL Reserves 50 GL Losses 352 GL IVT account 24 GL 2020/21 High priority needs 350 GL consumptive use 85 GL e-water 28 GL

Total = 1848 GL

Total Carryover 152 GL Total GS 265 GL

Supply Distribution(10)

Total = 1848 GL

Minimum inflows 474 GL Burrinjuck Dam 340 GL Blowering Dam 869 GL

Usage to-date 165 GL

*Indicative breakdown

• f held environmental

water holdings (OEH, TLM, CEWH), refer to note 9.

Do we have enough water for next water year ?

• S&D and TWS
• High security
• Conveyance
• General Security C/O
• New general security allocation

Page 12

Forecast General Security allocation (per cent) – using dry tercile

Page 13

Ranked inflow data from 1890 to 2018 1/3 1/3 1/3

Lowest Highest

Tercile inflow data

Page 14

Main river transmission losses

Rainfall—the chance of above median for December to February

Page 15

Rainfall—the chance of above median for January to March

Page 16

Page 17

Page 18

2020-21 Outlook

• Based on Minimum inflows, and expected water from

Snowy, all the essential supply requirements are secured for the water year 2020/21

• If transmission losses higher than expected, then

there could be small shortfall in resources

• These shortfall are generally recovered through winter

rains

Page 19

Updates on WRP and WSPs

• Submission of redrafted WRPs (including rewritten regulated WSPs and

amended unregulated WSPs) to MDBA – December 2019. These incorporate many elements of public submissions from all valleys.

• Murray-Lower Darling and Murrumbidgee stakeholder (SAP) meetings –

Early next year

• Finalised WRPs and gazettal of rewritten regulated WSPs – Next year

Murray , Murrumbidgee, and Lower Darling

Page 20

Trade

Page 21

94.2 GL to Murray

Page 22

Water Prices - Murrumbidgee

Page 23

Water Prices - Murray

Any feedback : water.allocations@dpi.nsw.gov.au

Thank you