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Adelaide: Statement of Changes in Water Assets and Water Liabilities

For the water account period 1 July 2023 to 30 June 2024

  • The volume of water in Adelaide's storages decreased by 49 GL during 2023–24.
  • This decrease represents the change in water volume in the region's surface water storages.

Schematic representation of the Adelaide region. Total water inflows during 2023–24 was 1,021 GL. Total water outflows was 921 GL. Water storage on 30 June 2024 was 49 GL lower than the previous year.

The Statement of Changes in Water Assets and Water Liabilities is provided in the table below.
The statement presents the actual water flows associated with the region's water stores, as well as the changes in water assets and water liabilities that occurred during the year.

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 2024 (ML)2023 (ML)2022 (ML)2021 (ML)2020 (ML)2019 (ML)
Water inflows
Surface water inflows 338,205536,679462,667359,398367,650378,462
Precipitation on storages6,68312,4939,5207,8057,2127,215
Precipitation on rivers3,1267,6105,3292,4842,2912,040
Flood return8,17811,37542,20216,61521,87726,257
Runoff111,297296,280197,303123,711145,085109,907
Discharge of groundwater*73,92173,92173,92173,92173,92173,921
Urban water return*--2583,4563,8801,150
Delivery of inter-region agreement to surface water135,000135,000134,134131,406113,384157,612
 
Groundwater inflows 353,032454,377355,558336,785285,665244,763
Recharge from landscape278,183342,435260,807269,519222,816196,767
Recharge from surface water*57,02294,99670,30652,07747,03142,384
Inflow from outside region706617446866228
Inflow from the sea1,0671,0319009871,3971,485
Leakage from urban water system*13,05112,68920,54810,83910,9082,162
Managed aquifer recharge by urban system*503109492527318250
Managed aquifer recharge by individual users2,5002,5002,4612,7683,1291,487
 
Urban water system inflows297,684270,658277,172285,794283,964284,793
Delivery of desalinated water4,8274,8045,3235,13940,0014,901
Diversion of surface water*171,334155,506161,965163,007127,928167,500
Wastewater collected121,523110,348109,884117,648116,035112,392
 
Irrigation scheme inflows32,34829,84532,49730,26131,84137,262
Delivery of inter-region agreement to irrigation scheme11,00011,00010,94911,03210,76511,051
Non-allocated extraction of groundwater*230230229207279200
Recycled water received from other water system700700718718414622
Recycled water received from urban water system*20,41817,91520,60118,30420,38325,389
 
Total water inflows1,021,2691,291,5591,127,8941,012,238969,120945,280
Water outflows
Surface water outflows 495,624784,270721,781392,370359,786375,313
Evaporation from storages17,08717,65716,73616,05413,97017,488
Evaporation from rivers4,9899,2527,8905,7122,5192,522
Outflow to sea174,071361,961317,951101,141127,245106,434
Overbank flow68,148141,925143,96651,01938,08135,255
Recharge to groundwater*57,02294,99670,30652,07747,03142,384
Allocated diversion to individual users2,9732,9732,9673,3603,0123,730
Diversion to the urban system*171,334155,506161,965163,007127,928167,500
 
Groundwater outflows 121,691121,852122,334120,361121,657112,062
Discharge to surface water*73,92173,92173,92173,92173,92173,921
Outflow to outside region1,2581,333208221293252
Outflow to sea2,1672,2534,4371,2461,7723,321
Allocated extraction to individual users44,11544,11543,53944,76645,39234,368
Non-allocated extraction to irrigation scheme*230230229207279200
 
Urban water system outflows269,833246,712272,065238,906245,626251,453
Discharge to sea75,23881,97969,34764,28262,72656,602
Leakage to groundwater*13,05112,68920,54810,83910,9082,162
Managed aquifer recharge*503109492527318250
Other losses7,4202,2883,5432,2162,28611,902
Other wastewater losses6,897-6,9572,5071,6338,155
Return to surface water*--2583,4563,8801,510
Supply of drinking water to commerical and industrial customers27,84825,87627,12617,78631,46728,758
Supply of drinking water to residential customers112,583102,680111,164111,195109,263109,610
Supply of recycled water for own use2,7134925264,714-3,574
Supply of recycled water to agriculture and irrigation customers*14,60012,90419513,79720,383184
Supply of recycled water to commercial and industrial customers2,7851,82211,0052,5752,3891.878
Supply of recycled water to irrigation water schemes*5,8185,01120,4064,507-25,205
Supply of recycled water to other customers-229----
Supply of recycled water to residential customers377633498505373398
Treated wastewater discharge to landscape-----1,265
 
Irrigation scheme outflows34,20034,20034,23832,98834,77635,628
Irrigation delivery34,20034,20034,23832,98834,77635,628
 
Total water outflows921,3481,187,0341,150,418784,625761,845774,456
 
Unaccounted-for difference(149,415)(67,147)26,937(225,559)(201,713)(170,141)
 
 
Change in water storage      
Change in surface water storage(49,494)37,3784,4132,0545,562683
Change in groundwater storage000000
Change in urban storages000000
Total change in water storage(49,494)37,3784,4132,0545,562683
 
Closing water storage179,489228,983191,605187,192185,138179,576
 
 
Change in water liability
Surface water liability0(133)16(290)315(123)
Allocation remaining: individual users0(133)16(290)315(123)
 
Groundwater liability012,48511,989(1,501)88831,484
Allocation remaining: individual users012,48511,989(1,501)88831,484
Total change in water liability012,35212,005(1,791)1,20331,361
       
Net change in water assets(49,494)25,026(7,592)3,8454,359(30,678)

* between-store flows

Note: quantification approaches used to derive each item volume are provided in the Methods.