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South East Queensland: 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 South East Queensland's storages increased by 185 GL in 2023–24.
  • This increase is primarily driven by changes to the water volume in South East Queensland's surface water storages.

Schematic representation of the South East Queensland region. Total water inflows during 2023-24 was 6,170 GL. Total water outflows was 5,531GL. Change in water storage on 30 June 2024 was 185 GL more 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 inflows5,017,6301,763,71916,083,1994,177,3593,364,8341,265,194
Precipitation on storages198,324176,418416,348158,108118,553136,149
Precipitation on rivers53,09429,761210,76152,78638,61621,086
Flood return176,331110,551512,856237,450105,05330,388
Runoff4,575,6771,436,60714,921,0613,714,0623,088,5801,063,412
Discharge from users2,0302,0302,0301,1632,7352,191
Treated wastewater discharge from urban water system*12,1748,35220,14313,79011,29711,968
 
Groundwater inflows492,953429,529874,103551,359285,333237,978
Recharge from surface water*467,324405,123850,236528,082259,411211,564
Leakage from urban water system*25,62924,40623,86723,27725,92226,414
 
Urban water system inflows659,121611,022664,704624,016642,762564,456
Delivery of desalinated water9,6277,24012,71419,48613,8056,438
Diversion of surface water*338,715323,172294,590310,807351,788305,896
Extraction of groundwater*5,7776,1553,6327,1807,8816,688
Inter-region delivery to the urban system00071414
Wastewater collected305,002274,455353,768286,538269,274252,108
 
Total water inflows6,169,7042,804,27017,622,0065,352,7344,292,9292,074,316
Water outflows
Surface water outflows4,901,7323,083,72017,973,2554,520,1883,069,9411,800,819
Evaporation from storages304,712314,95958,179235,470271,888316,216
Evaporation from rivers38,15533,49158,17940,71525,63721,578
Leakage to landscape219,643118,983198,39892,57265,98074,878
Outflow to sea3,128,8791,654,57915,268,7822,662,2131,842,257760,467
Overbank flow379,054206,0941,015,333619,611199,61974,995
Recharge to groundwater*467,324405,123850,236528,082259,411211,564
Allocated diversion to individual users20,01621,83512,78225,43148,27330,103
Diversion to the urban system*338,715323,172294,590310,807351,788305,896
Diversion to statutory rights3,9923,9303,9923,9923,8063,810
Non-allocated diversion to individual users1,2421,5541,1581,2951,2821,312
Other surface water decreases000000
 
Groundwater outflows19,23316,1798,80819,14626,23117,106
Allocated extraction to individual users5,5965,6483,6317,51011,22210,905
Extraction to the urban system*5,7776,1553,6327,1807,8816,688
Non-allocated extraction to individual users7,8604,3761,5454,4567,1286,201
 
Urban water system outflows610,489543,391617,098590,007607,146588,975
Discharge to sea219,817194,043241,443202,966191,650178,316
Leakage to groundwater*25,62924,40623,86723,27725,92226,414
Other losses7,1656,9056,4116,8388,3548,609
Other wastewater losses3,1694776,0782,8711,059590
Supply of drinking water for own use1,9361,4211,4341,6811,7611,672
Supply of drinking water to agriculture and irrigation customers34,0571,31717,49916,26439,47546,574
Supply of drinking water to commercial and industrial customers73,95876,02880,14988,42989,97779,904
Supply of drinking water to other customers67802409434427,159
Supply of drinking water to residential customers217,834211,674206,125219,223222,264208,824
Supply of recycled water for own use4,1254,5643,7023,9923,4283,687
Supply of recycled water to agriculture and irrigation customers7958308661,3971,7481,738
Supply of recycled water to commercial and industrial customers8,59111,4778,0088,5378,24910,143
Supply of recycled water to other customers37260151916
Supply of recycled water to residential customers001101
Supply of recycled water to irrigation water schemes11710209912193
Treated wastewater discharge to surface water*12,1748,35220,14313,79011,29711,968
Urban discharge to landscape1,0189679635841,3803,267
Wastewater transfer to other region000000
 
Total water outflows5,531,4543,700,03518,594,1565,129,3453,693,2612,382,522
 
Unaccounted-for difference(453,193)541,7911,778,338(271,069)(712,748)(4,246)
 
 
Change in water storage      
Change in surface water storage185,095(355,838)805,061(47,678)(132,135)(319,140)
Change in groundwater storage(38)(76)114019,0550
Change in urban water storage000000
Total change in water storage185,057(355,914)805,175(47,678)(113,080)(319,140)
 
Closing water storage2,146,9401,961,6482,317,8371,512,6221,560,3001,673,380
 
 
Change in water liability
Surface water liability000000
Allocation remaining: individual users0 00000
 
Groundwater liability000000
Allocation remaining: individual users000000
Total change in water liability000000
       
Net change in water assets185,057(355,914)805,175(47,678)(113,080)(319,140)

*between-store flows

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