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National Water Account 2015

Ord: Statement of Water Flows

Lake Argyle Dam, Western Australia (iStock © czardases)

The Statement of Water Flows presents the actual water inflows and outflows associated with the water stores of the region that occurred during the reporting year.

Figure W3 shows the actual water flows, including flows corresponding to the accrual transactions shown in Figure W2 in the Statement of Changes of Water Assets and Water Liabilities.

 

Figure W3  Schematic diagram of water flows for the region during the 2014–15 year
Figure W3 Water flows for the region during the 2014–15 year

 

More detail on the water flows for the 2014–15 year is provided in the Statement of Water Flows below.

Items in the statements are hyperlinked to the associated section of the Supporting information notes. Methods used to derive item volumes are provided in the Quantification approaches notes.

 

for the year ended 30 June 2015

 2015 ML2014 ML
Water inflows
Surface water inflows6,467,90114,958,874
Precipitation582,1881,043,170
Runoff5,834,25413,915,118
Point return: irrigation51,000
Discharge: wastewater459586
Total surface water inflows6,467,90114,958,874
 
Groundwater inflows9,33310,683
Inter-region inflow
Recharge: landscape9,33310,683
Total groundwater inflows9,33310,683
 
Total water inflows6,477,23414,969,557
Water outflows
Surface water outflows6,453,88310,405,662
Evaporation2,458,0541,384,330
Outflow3,806,6388,848,449
Leakage: landscape4545
Allocated diversion: individual users23,05726,271
Allocated diversion: urban system436473
Allocated diversion: irrigation165,653146,094
Total surface water outflows6,453,88310,405,662
 
Groundwater outflows9,33310,683
Inter-region outflow
Discharge: landscape
Allocated extraction: individual users7,5608,965
Allocated extraction: urban system1,7731,718
Total groundwater outflows9,33310,683
 
Total water outflows6,463,21610,416,345
Unaccounted-for difference
Unaccounted-for difference(1,015,905)(2,202,978)
Unaccounted-for difference(1,015,905)(2,202,978)
Total unaccounted-for difference(1,015,905)(2,202,978)
 
Total unaccounted-for difference(1,015,905)(2,202,978)
Opening water storage10,944,8578,594,623
Change in water storage(1,001,887)2,350,234
Closing water storage9,942,97010,944,857