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National Water Account 2017

Melbourne: Statement of Changes in Water Assets and Water Liabilities

for the year ended 30 June 2017

Water availability in the Melbourne region increased by 87,474 ML during the 2016–17 year. This is the region's first increase of water availability in three years. The change in water available in the region at the end of the year is represented by the change in net water assets.


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.


 2017 ML2016 ML
Water asset increases
Surface water increases2,191,7681,091,830
Point return: irrigation6182
Flood return90,424
Claims: inter-region188,238132,993
Claims: desalinated water46,2160
Groundwater increases231,201233,121
Inter-region inflow00
Inter-region coastal inflow28,71328,394
Recharge: landscape202,488192,457
Other groundwater increases012,270
Urban water system increases377,859351,066
Wastewater collected377,859350,688
Delivery: inter-region378
Other increases00
Total water asset increases2,800,8281,676,017
Water liability decreases
Surface water liability decreases3,423961
Adjustment and forfeiture: individual users1,990600
Adjustment and forfeiture: inter-region1,433361
Groundwater liability decreases37,61945,864
Adjustment and forfeiture: individual users37,61945,864
Total water liability decreases41,04246,825
Water asset decreases
Surface water decreases1,453,516827,955
Overbank flow137,399
Diversion: statutory rights
Non-allocated diversion: individual users7,32514,670
Claims: inter-region42,99558,354
Claims: desalinated water00
Groundwater decreases165,506124,561
Inter-region outflow00
Inter-region coastal outflow134,657124,561
Discharge: landscape
Extraction: statutory rights
Non-allocated extraction: individual users
Other groundwater decreases30,8490
Urban water system decreases758,790739,864
Delivery: urban users386,197390,311
Delivery: irrigation8,97011,868
Discharge: sea301,846267,248
Discharge: landscape19027
Supply system transfer: inter-region1,071431
Supply system delivery: irrigation7561,365
Other supply system decreases11,71715,574
Recycled water delivery: urban users30,63331,492
Other wastewater decreases17,41021,548
Total water asset decreases2,377,8121,692,380
Water liability increases
Surface water liability increases23,8427,076
Allocation: individual users18,6173,175
Allocation: inter-region5,2253,901
Groundwater liability increases57,93170,467
Allocation: individual users57,93170,467
Total water liability increases81,77377,543
Unaccounted-for difference(294,811)(129,243)
Change in net water assets87,474(176,324)