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National Water Account 2019

Melbourne: Statement of Changes in Water Assets and Water Liabilities

for the year ended 30 June 2019

  • Water availability decreased during 2018–19 for the second successive year.
  • The change in water available is represented by the change in net water assets.

 

MEL_KeyMessage

 

The Statement of Changes in Water Assets and Water Liabilities is provided in the table below. The statement presents the changes in water assets and water liabilities that occurred during the year, including accrual transactions (e.g. allocations and forfeitures) and actual water flows, both natural and engineered.

 

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 2019 ML2018 ML2017 ML2016 ML2015 ML2014 ML
Water asset increases
Surface water increases 825,0181,112,4851,928,386903,3751,108,4451,571,095
Precipitation50,069**62,104**74,360**56,263**60,364**73,428
Inter-region inflow126,955**157,667**196,912**132,079**158,395**198,467
Runoff566,395**798,421**1,510,712**626,694**764,602**1,152,658
Point return: irrigation24657618212161
Flood return25,522**44,260**90,152**33,501**59,568**75,757
Discharge: urban supply*00831281349362
Discharge: wastewater*13,65318,65817,44314,20628,22328,956
Claims: inter-region42,178**31,318**37,915**40,269**36,823**41,406
  
Groundwater increases 290,791319,906385,279301,539332,369360,260
Inter-region coastal inflow29,90328,47128,71328,39433,66530,504
Recharge: landscape119,528**125,443**127,676**119,311**123,707**128,239
Recharge: surface water*107,763**126,101**195,120**115,239**139,246**164,944
Leakage: urban system*33,59739,89133,77038,595**35,751**36,573
  
Urban water system increases 994,854989,0151,152,340993,432922,5111,026,637
Wastewater collected359,631361,263377,859350,527336,494350,537
Delivery: desalinated water22,37414,97246,209000
Claims: surface water*611,350**611,281**726,773**641,406**584,954**675,687
Claims: groundwater*1,4991,4991,4991,4991,063413
  
Total water asset increases2,110,663**2,421,406**3,466,005**2,198,346**2,363,325**2,957,992
Water liability decreases
Surface water liability decreases 210,658186,802262,552199,107191,951248,972
Adjustment and forfeiture: individual users1,8101,547**2,9006001,9781,867
Adjustment and forfeiture: urban system*207,594**183,879**258,219**198,146**189,573**246,740
Adjustment and forfeiture: inter-region1,2541,3761,433361400365
  
Groundwater liability decreases 45,09548,23339,05847,26143,10726,467
Adjustment and forfeiture: individual users43,66846,80637,61945,86442,13026,156
Adjustment and forfeiture: urban system*1,4271,4271,4391,397977311
  
Total water liability decreases255,753**235,035**301,610**246,368**235,058**275,439
Water asset decreases
Surface water decreases 782,4321,020,9121,507,263890,1151,105,3461,311,705
Evaporation72,833**78,831**78,674**74,096**78,219**81,770
Outflow534,774**682,047**1,026,002**584,548**732,237**871,942
Recharge: groundwater*107,763**126,101**195,120**115,239**139,246**164,944
Overbank flow41,672**79,644**169,415**63,365**103,799**137,830
Non-allocated diversion: individual users13,65212,243**12,04214,67012,55013,682
Claims: inter-region11,738**42,046**26,010**38,197**39,295**41,537
  
Groundwater decreases 130,311132,349134,657124,561150,634147,712
Inter-region coastal outflow130,311132,349134,657124,561139,716137,638
Discharge: landscape––––10,91810,074
  
Urban water system decreases 1,024,9191,000,4711,072,081989,173941,785994,393
Leakage: groundwater*33,59739,89133,77038,595**35,751**36,573
Delivery: urban users409,913398,598386,147389,989368,103363,157
Discharge: surface water*00831281349362
Recycled water delivery: irrigation12,41512,2248,97011,8687,5675,769
Discharge: sea268,481277,668301,846267,248261,293275,538
Discharge: landscape1072531901311830
Supply system transfer: inter-region5,8362,1591,071431247351
Supply system delivery: irrigation1,2561,5077561,36567112
Other supply system decreases13,68614,69913,35512,56712,39514,397
Recycled water delivery: urban users38,42231,48030,63331,44022,63422,072
Wastewater discharge: surface water*13,65318,65817,44314,20628,22328,956
Other wastewater decreases18,53218,02817,41121,50914,42355
Claims: surface water*207,594**183,879**258,219**198,146**189,573**246,740
Claims: groundwater*1,4271,4271,4391,397977311
  
Total water asset decreases1,937,662**2,153,732**2,714,001**2,003,849**2,197,765**2,453,810
Water liability increases
Surface water liability increases 623,753622,857750,615648,482599,603696,123
Allocation: individual users6,9786,35118,6173,17511,14316,545
Allocation: urban system*611,350**611,281**726,773**641,406**584,954**675,687
Allocation: inter-region5,4255,2255,2253,9013,5063,891
  
Groundwater liability increases 66,12769,31559,43071,96662,23440,881
Allocation: individual users64,62867,81657,93170,46761,17140,468
Allocation: urban system*1,4991,4991,4991,4991,063413
  
Total water liability increases689,880**692,172**810,045**720,448**661,837**737,004
  
Unaccounted-for difference 142,842**89,999**(144,847)**100,374**149,584**(25,650)
  
 
Change in net water assets      
Change in net surface water assets(78,534)**(67,551)**67,818**(177,712)**(86,124)**2,771
Change in net groundwater assets000000
Change in net urban water assets(39,750)(31,913)30,904(1,497)(25,511)14,196
Total change in net water assets (118,284)**(99,464)**98,722**(179,209)**(111,635)**16,967

 

* between-store flows

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