Melbourne: Statement of Changes in Water Assets and Water Liabilities
Water availability in the Melbourne region decreased by 176,315 ML during the 2015–16 year. This is the second successive year the water availability in the region decreased by 13% due to a decrease in storage volume and inter-region claims. 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 is prepared on an accrual basis, and presents the changes in water assets and water liabilities that occurred during the reporting year. These changes include accrual transactions (e.g. allocations and forfeitures) and actual water flows, both natural and engineered.
Items in the statements are hyperlinked to the associated section of the Statement details. Methods used to derive item volumes are provided in the Reference information notes.
for the year ended 30 June 2016
| 2016 ML | 2015 ML | |
|---|---|---|
| Water asset increases | ||
| Surface water increases | 1,091,830 | 1,297,202 |
| Precipitation | 42,410 | 31,431 |
| Runoff | 916,345 | 1,105,096 |
| Point return: irrigation | 82 | 121 |
| Discharge: user | – | – |
| Claims: inter-region | 132,993 | 160,554 |
| Claims: desalinated water | 0 | 0 |
| Total surface water increases | 1,091,830 | 1,297,202 |
| Groundwater increases | 220,851 | 376,818 |
| Inter-region inflow | 0 | 0 |
| Inter-region coastal inflow | 28,394 | 33,665 |
| Recharge: landscape | 192,457 | 287,949 |
| Other groundwater increases | 0 | 55,204 |
| Total groundwater increases | 220,851 | 376,818 |
| Urban water system increases | 351,066 | 336,882 |
| Wastewater collected | 350,688 | 336,494 |
| Delivery: inter-region | 378 | 388 |
| Other increases | 0 | 0 |
| Total urban water system increases | 351,066 | 336,882 |
| Total water asset increases | 1,663,747 | 2,010,902 |
| Water liability decreases | ||
| Surface water liability decreases | 970 | 2,378 |
| Adjustment and forfeiture: individual users | 609 | 1,978 |
| Adjustment and forfeiture: inter-region | 361 | 400 |
| Total surface water liability decreases | 970 | 2,378 |
| Groundwater liability decreases | 45,864 | 42,130 |
| Adjustment and forfeiture: individual users | 45,864 | 42,130 |
| Total groundwater liability decreases | 45,864 | 42,130 |
| Total water liability decreases | 46,834 | 44,508 |
| Water asset decreases | ||
| Surface water decreases | 827,955 | 982,746 |
| Evaporation | 58,034 | 54,829 |
| Outflow | 696,897 | 854,717 |
| Diversion: statutory rights | – | – |
| Non-allocated diversion: individual users | 14,670 | 12,550 |
| Claims: inter-region | 58,354 | 60,650 |
| Claims: desalinated water | 0 | 0 |
| Total surface water decreases | 827,955 | 982,746 |
| Groundwater decreases | 136,831 | 150,634 |
| Inter-region outflow | 0 | 0 |
| Inter-region coastal outflow | 124,561 | 139,716 |
| Discharge: landscape | – | 10,918 |
| Extraction: statutory rights | – | – |
| Non-allocated extraction: individual users | – | – |
| Other groundwater decreases | 12,270 | 0 |
| Total groundwater decreases | 136,831 | 150,634 |
| Urban water system decreases | 739,594 | 697,115 |
| Evaporation | – | 15,896 |
| Leakage: landscape | – | 5,013 |
| Delivery: urban users | 390,311 | 368,451 |
| Delivery: irrigation | 11,868 | 7,567 |
| Discharge: sea | 267,248 | 261,293 |
| Discharge: other | 27 | 131 |
| Supply system transfer: inter-region | 161 | 247 |
| Other supply system decreases | 15,574 | 15,745 |
| Recycled water delivery: urban users | 31,492 | 22,634 |
| Other wastewater decreases | 21,548 | 71 |
| Supply system delivery: irrigation | 1,365 | 67 |
| Total urban water system decreases | 739,594 | 697,115 |
| Total water asset decreases | 1,704,380 | 1,830,495 |
| Water liability increases | ||
| Surface water liability increases | 7,076 | 14,649 |
| Allocation: individual users | 3,175 | 11,143 |
| Allocation: inter-region | 3,901 | 3,506 |
| Total surface water liability increases | 7,076 | 14,649 |
| Groundwater liability increases | 70,467 | 61,171 |
| Allocation: individual users | 70,467 | 61,171 |
| Total groundwater liability increases | 70,467 | 61,171 |
| Total water liability increases | 77,543 | 75,820 |
| Unaccounted-for difference | ||
| Unaccounted-for difference | (104,973) | (261,418) |
| Unaccounted-for difference | (104,973) | (261,418) |
| Total unaccounted-for difference | (104,973) | (261,418) |
| Total unaccounted-for difference | (104,973) | (261,418) |
| Change in net water assets | (176,315) | (112,323) |