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National Water Account 2018

Murray–Darling Basin: Statement of Water Flows

for the year ended 30 June 2018

  • The volume of water in the region's storages decreased during the 2017–18 year.
  • This decrease primarily represents the change in water volume in the region's surface water storages.

 

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The Statement of Water Flows is provided below and presents the actual water flows associated with the region's water stores during the year, including flows corresponding to the accrual transactions shown in the Statement of Changes in Water Assets and Water Liabilities.

 

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 2018 ML2017 ML2016 ML2015 ML2014 ML2013 ML
Water inflows
Surface water inflows18,091,43143,230,63923,724,26117,814,47319,865,77629,694,749
Precipitation1,293,7252,048,6891,248,8501,199,9121,172,6231,155,617
Inter-region inflow627,00022,00000151,000451,000
Discharge: groundwater*56,1301,352,38568,677311,800117,572558,770
Runoff13,047,26134,932,92219,091,88814,403,14816,374,41825,143,874
Point return: irrigation256,336277,177295,507297,113259,779212,773
Flood return536,9431,670,9520000
Discharge: urban supply system0000031,636
Delivery: inter-region agreement1,577,8182,659,1022,392,3091,253,5881,692,1652,141,079
Return flow: environmental purposes660,284229,298590,587314,01164,2000
Discharge: wastewater35,93438,11436,04334,90134,0190
 
Groundwater inflows877,2552,293,665671,7092,716,9865,016,5392,493,412
Inter-region inflow2,4342,4612,5532,6572,7332,646
Inter-region coastal inflow7210177908250
Recharge: landscape494,812680,003407,3402,189,8143,552,5321,539,098
Recharge: surface water*234,2421,605,429260,586453,058273,293680,878
Leakage: urban system4,4764,0790000
Managed aquifer recharge: individual user4691,5921,1532671,211631
Other increases140,7500071,1001,186,688270,109
 
Total water inflows18,968,68645,524,30424,395,97020,531,45924,882,31532,188,161
Water outflows
Surface water outflows22,275,70437,345,26123,269,86121,543,14822,529,54235,188,111
Evaporation4,115,4864,518,2033,376,2654,871,1022,701,7473,021,950
Outflow885,8287,401,000663,0001,196,0001,784,0005,267,000
Recharge: groundwater*234,2421,605,429260,586453,058273,293680,878
Overbank flow1,062,6426,273,87259,54621,490207,528437,901
River and floodplain losses5,298,0357,008,47810,420,9545,446,3067,088,01512,618,360
Diversions: statutory rights50,86150,86159,24927,69268,21068,210
Overland flow take48,505288,5080000
Non-allocated diversion: individual users520,9741,675,241818,728773,9271,283,8732,137,025
Non-allocated diversion: urban system7,00911,66112,25510,5617,16819,880
Allocated diversion: individual users6,868,9955,716,5234,734,9346,561,3727,185,83310,571,312
Allocated diversion: urban system385,181308,004481,808365,820327,390365,595
Allocated diversion: environmental purposes2,411,3982,042,3911,912,8841,695,2701,549,2660
Non-allocated diversion: environmental purposes12,337154,21842,246120,55053,2190
Conveyance losses for allocated diversions374,211290,872427,406000
 
Groundwater outflows1,859,8662,617,7521,685,0684,008,8665,196,2384,594,247
Inter-region outflow603357243121
Inter-region coastal outflow1,3241,4931,7001,5321,5161,446
Discharge: landscape158,11563,99985,6412,144,4161,583,8682,733,597
Discharge: surface water*56,1301,352,38568,677311,800117,572558,770
Extraction: statutory rights237,321239,100237,669221,332221,408230,416
Non-allocated extraction0003,38500
Allocated extraction: individual users1,348,065910,8501,270,1771,289,5941,114,458942,343
Allocated extraction: urban system45,59938,91421,14736,78334,49737,096
Allocated extraction: salinity and water table management10,15210,9780000
Allocated extraction: environmental purposes00005,6740
Other decreases3,1000002,117,21490,558
 
Total water outflows24,135,57039,963,01324,954,92925,552,01427,725,78039,782,358
Unaccounted-for difference1,120,261324,0871,013,3591,362,980(750,827)2,280,386
 
 
Water storage
Surface water storage14,614,23418,798,50712,913,12912,458,72916,187,40418,851,170
Opening surface water storage18,798,50712,913,12912,458,72916,187,40418,851,17024,344,532
Change in surface water storage(4,184,273)5,885,378454,400(3,728,675)(2,663,766)(5,493,362)
Closing surface water storage14,614,23418,798,50712,913,12912,458,72916,187,40418,851,170
 
Groundwater storage3,471,3903,333,7403,333,7403,333,7402,262,6404,193,166
Opening groundwater storage3,333,7403,333,7403,333,7403,262,6404,193,1664,013,615
Change in groundwater storage137,6500071,100(930,526)179,551
Closing groundwater storage3,471,3903,333,7403,333,7403,333,7403,262,6404,193,166
Total closing water storage18,085,62422,132,24716,246,86915,792,46919,450,04423,044,336
 

* between-store flows