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National Water Account 2019

Murray–Darling Basin: Statement of Changes in Water Assets and Water Liabilities

for the year ended 30 June 2019

  • The volume of water in the region's storages decreased during 2018–19 for the second successive year.
  • This decrease primarily represents the change in water volume in the region's surface water storages.

 

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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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 2019 ML2018 ML2017 ML2016 ML2015 ML2014 ML
Water inflows
Surface water inflows 12,495,62816,583,70243,664,03019,691,12014,936,59719,171,189
Precipitation875,987**1,152,919**1,993,563**1,122,660**1,072,839**1,399,613
Inter-region inflow2,202,600**2,204,818**2,681,102**2,392,309**1,253,588**1,843,165
Discharge: groundwater*53,59256,1301,352,38568,677311,800117,572
Runoff7,954,376**11,449,532**34,918,787**14,432,943**10,871,119**14,560,973
Point return: irrigation281,947256,336277,177295,507297,113259,779
Flood return717,186**767,748**2,173,604**751,994**781,227**891,868
Discharge: urban supply system000000
Return flow: environmental purposes373,378660,285229,298590,587314,01064,200
Discharge: wastewater36,56235,93438,11436,04334,90134,019
  
Groundwater inflows 709,157877,8042,293,665671,7092,721,9865,016,539
Inter-region inflow2,321**2,8042,4612,5532,6572,733
Inter-region coastal inflow369**251101779082
Recharge: landscape496,733494,812680,003407,340**2,194,814**3,552,532
Recharge: surface water*205,777234,2421,605,429260,586453,058273,293
Leakage: urban system2,9384,4764,079000
Managed aquifer recharge: individual user(41)4691,5921,1532671,211
Other increases1,060140,7500071,1001,186,688
  
Total water inflows13,204,78517,461,50645,957,69520,362,82917,658,58324,187,728
Water outflows
Surface water outflows 13,312,04417,441,68627,678,28014,521,90916,163,45918,345,465
Evaporation3,089,687**3,631,936**4,451,122**3,010,323**3,314,125**3,893,269
Outflow1,321,435**1,596,040**4,217,894**1,385,331**1,564,378**1,932,830
Recharge: groundwater*205,777234,2421,605,429260,586453,058273,293
Overbank flow1,152,468**1,296,925**6,865,556**1,376,159**1,272,298**1,717,895
River and floodplain losses––––––
Diversions: basic rights60,84150,86150,86159,24927,69268,210
Floodplain harvesting83,37448,505288,508000
Non-allocated diversion: individual users392,936520,9741,675,241818,728**778,334**1,337,092
Non-allocated diversion: urban system6,7617,00911,66112,25510,5617,168
Allocated diversion: individual users4,856,8696,868,9965,716,5234,734,9346,561,3737,185,833
Allocated diversion: urban system500,364385,181308,004481,808365,820327,390
Allocated diversion: environmental purposes1,237,1922,411,3982,042,3911,912,8841,695,2701,549,266
Non-allocated diversion: environmental purposes8,74112,337154,21842,246120,55053,219
Conveyance losses for allocated diversions395,599377,282290,872427,40600
  
Groundwater outflows 2,103,8161,870,2202,617,7531,685,0694,008,8685,196,238
Inter-region outflow198**11233572431
Inter-region coastal outflow1,308**1,5651,4931,7001,5321,516
Discharge: landscape155,903158,11563,99985,6412,144,4161,583,868
Discharge: surface water*53,59256,1301,352,38568,677311,800117,572
Extraction: basic rights224,804237,229239,101237,670221,333221,408
Non-allocated extraction00003,3850
Allocated extraction: individual users1,598,6981,358,218910,8501,270,1771,289,5951,114,458
Allocated extraction: urban system49,77545,59938,91421,14736,78334,497
Allocated extraction: salinity and water table management19,53810,15210,978000
Allocated extraction: environmental purposes000005,674
Other decreases03,1000002,117,214
  
Total water outflows15,415,86019,311,90630,296,03316,206,97820,172,32723,543,703
Unaccounted-for difference (2,366,674)**(1,895,159)**(9,364,911)**(4,277,551)**(995,596)**(4,391,754)
 
 
Change in water storage      
Change in surface water storage(4,578,809)(3,883,209)6,296,751(121,700)(3,580,440)(2,815,203)
Change in groundwater storage1,060137,6500071,100(930,526)
Total change in water storage(4,577,749)(3,745,559)6,296,751(121,700)(3,509,340)(3,745,729)
 
Closing water storage12,692,43617,270,18521,015,74414,718,99314,840,69318,350,033
 
 
Change in water liability
Surface water liability(1,758,348)(1,294,865)2,419,843(75,496)(403,383)(1,088,724)
Allocation remaining: individual users(1,388,063)(1,318,772)2,179,961166,690(590,602)(1,778,788)
Allocation remaining: urban system000000
Allocation remaining: environmental purposes(370,285)23,907239,882(242,186)187,219690,064
 
Groundwater liability639,073(156,283)40,524(11,559)(80,244)14,799
Allocation remaining: individual users641,970(161,131)33,867(13,632)(82,401)14,700
Allocation remaining: urban system000000
Allocation remaining: salinity and water table management000000
Allocation remaining: environmental purposes(2,897)4,8486,6572,0732,15799
Total change in water liability(1,119,275)(1,451,148)2,460,367(87,055)(483,627)(1,073,925)
       
Net change in water assets(3,458,474)(2,294,411)3,836,384(34,645)(3,025,713)(2,671,804)
 

 

* between-store flows

** different to published volume in historical accounts (see Governance section for more information)