Perth
Statement of Water Flows

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2012 ML 2011 ML
Water inflows
Surface water inflows 676,117 144,248
9.1 Precipitation on surface water 25,567 15,637
9.4 Runoff to surface water 645,981 125,396
9.7 Delivery of water from outside region 4,569 3,215
Total Surface water inflows 676,117 144,248
Groundwater inflows 1,701,029 1,018,805
10.1 Groundwater inflow from outside region 50,337 52,412
10.2 Groundwater inflow from outside region at coast 0 0
10.3 Recharge from landscape 1,650,692 966,393
Total Groundwater inflows 1,701,029 1,018,805
Urban water system inflows 214,201 179,930
11.4 Wastewater collected 135,354 127,920
11.6 Delivery of desalinated water to urban water system 78,847 52,010
Total Urban water system inflows 214,201 179,930
Total water inflows 2,591,347 1,342,983
Water outflows
Surface water outflows 592,130 226,103
17.1 Evaporation from surface water 32,761 40,330
17.2 River outflow from the region 509,541 117,192
17.3 Leakage to groundwater 0 0
17.4 Leakage to landscape 167 90
17.11 Entitled diversion of allocated surface water to users 24,975 42,640
17.14 Surface water transfer under inter-region commitment 24,686 25,851
Total Surface water outflows 592,130 226,103
Groundwater outflows 1,115,317 1,220,803
18.1 Groundwater outflow to outside region 33,964 31,602
18.2 Groundwater outflow to outside region at coast 304,748 264,790
18.3 Discharge to landscape 422,257 570,020
18.8 Entitled extraction of non-allocated groundwater to users 65,043 67,347
18.11 Entitled extraction of allocated groundwater to users 289,305 287,044
Total Groundwater outflows 1,115,317 1,220,803
Urban water system outflows 363,164 366,725
19.4 Delivery to urban water system users 237,896 243,724
19.7 Wastewater discharge outside of region 118,952 117,078
19.8 Other wastewater discharge 5,168 4,787
19.20 Other urban water system outflows 1,148 1,136
Total Urban water system outflows 363,164 366,725
Irrigation scheme outflows 23,777 30,678
20.4 Delivery to irrigation scheme users 23,777 30,678
Total Irrigation scheme outflows 23,777 30,678
Total water outflows 2,094,388 1,844,309
Unaccounted–for difference
Unaccounted–for difference 447,320 (407,682)
25.1 Unaccounted–for difference 447,320 (407,682)
Total Unaccounted–for difference 447,320 (407,682)
Total unaccounted-for difference 447,320 (407,682)
Opening water storage 167,546 261,190
Add/(Less): Change in water storage 49,639 (93,644)
Closing water storage 217,185 167,546