Sydney: Statement of Changes in Water Assets and Water Liabilities
Water availability in the Sydney region decreased by 130,526 ML during the 2016–17 year. This is the region's first decrease 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 ML | 2016 ML | |
|---|---|---|
| Water asset increases | ||
| Surface water increases | 4,585,101 | 5,061,325 |
| Precipitation | 173,155 | 139,962 |
| Runoff | 4,357,364 | 4,909,529 |
| Discharge: user | 828 | 0 |
| Claims: inter-region | 11,834 | 11,834 |
| Flood return | 41,920 | – |
| Urban water system increases | 564,042 | 547,783 |
| Wastewater collected | 564,042 | 547,783 |
| Total water asset increases | 5,147,143 | 5,609,108 |
| Water liability decreases | ||
| Surface water liability decreases | 140,849 | 138,889 |
| Adjustment and forfeiture: individual users | 140,849 | 138,889 |
| Total water liability decreases | 140,849 | 138,889 |
| Water asset decreases | ||
| Surface water decreases | 4,383,810 | 4,226,406 |
| Evaporation | 189,060 | 150,271 |
| Outflow | 3,888,675 | 4,036,219 |
| Diversion: statutory rights | 32,257 | 32,530 |
| Claims: inter-region | 8,122 | 7,386 |
| Overbank flow | 265,696 | – |
| Urban water system decreases | 1,039,878 | 1,016,562 |
| Leakage: groundwater | 41,670 | 37,665 |
| Supply system delivery: urban users | 502,178 | 491,281 |
| Recycled water delivery: urban users | 13,596 | 17,502 |
| Discharge: sea | 456,190 | 432,491 |
| Other supply system decreases | 11,076 | 10,113 |
| Discharge: landscape | 94 | 0 |
| Other wastewater and recycled water system decreases | 15,074 | 27,510 |
| Total water asset decreases | 5,423,688 | 5,242,968 |
| Water liability increases | ||
| Surface water liability increases | 159,394 | 159,390 |
| Allocation: individual users | 159,394 | 159,390 |
| Total water liability increases | 159,394 | 159,390 |
| Unaccounted-for difference | 164,564 | (189,050) |
| Change in net water assets | (130,526) | 156,589 |