Sydney: Statement of Water Flows
The volume of water in the region's storages at 30 June 2017 was 2,691,029 ML, a decrease of 130,526 ML from the start of the 2016–17 year. This decrease represents the change in water volume in the region's surface water storages. This is the region's first annual decrease in three years.
The Statement of Water Flows is provided below and presents the actual water flows associated with the region's water stores during the year, including flows corresponding to the accrual transactions shown in the Statement of Changes in Water Assets and Water Liabilities.
| 2017 ML | 2016 ML | |
|---|---|---|
| Water inflows | ||
| Surface water inflows | 4,576,979 | 5,053,939 |
| Precipitation | 173,155 | 139,962 |
| Runoff | 4,357,364 | 4,909,529 |
| Discharge: user | 828 | 0 |
| Delivery: inter-region agreement | 3,712 | 4,448 |
| Flood return | 41,920 | – |
| Urban water system inflows | 562,042 | 547,783 |
| Wastewater collected | 562,042 | 547,783 |
| Delivery: desalinated water | 0 | 0 |
| Total water inflows | 5,139,021 | 5,601,722 |
| Water outflows | ||
| Surface water outflows | 4,394,233 | 4,239,521 |
| Evaporation | 189,060 | 150,271 |
| Outflow | 3,888,675 | 4,036,219 |
| Diversion: statutory rights | 32,257 | 32,530 |
| Overbank flow | 265,696 | – |
| Allocated diversion: individual users | 18,545 | 20,501 |
| Urban water system outflows | 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 outflows | 5,434,111 | 5,256,083 |
| Unaccounted-for difference | 164,564 | (189,050) |
| Opening water storage | 2,821,555 | 2,664,966 |
| Change in water storage | (130,526) | 156,589 |
| Closing water storage | 2,691,029 | 2,821,555 |