Melbourne: Statement of Water Flows
for the year ended 30 June 2017
The volume of water in the region's storages at 30 June 2017 is 623,298 ML, an increase of 39,169 ML from the start of the 2016–17 year. This increase represents the change in water volume in the region's surface water storages. This is the region's first annual increase 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 | 2,092,971 | 1,206,994 |
| Precipitation | 60,576 | 42,410 |
| Runoff | 1,806,253 | 916,345 |
| Point return: irrigation | 61 | 82 |
| Flood return | 90,424 | – |
| Delivery: inter-region agreement | 89,441 | 248,157 |
| Delivery: desalinated water | 46,216 | 0 |
| Groundwater inflows | 231,201 | 233,121 |
| Inter-region inflow | 0 | 0 |
| Inter-region coastal inflow | 28,713 | 28,394 |
| Recharge: landscape | 202,488 | 192,457 |
| Other groundwater increases | 0 | 12,270 |
| Urban water system inflows | 377,859 | 351,066 |
| Wastewater collected | 377,859 | 350,688 |
| Delivery: inter-region | – | 378 |
| Other increases | 0 | 0 |
| Total water inflows | 2,702,031 | 1,791,181 |
| Water outflows | ||
| Surface water outflows | 1,423,443 | 778,145 |
| Evaporation | 65,142 | 58,034 |
| Outflow | 1,200,655 | 696,897 |
| Overbank flow | 137,399 | – |
| Diversion: statutory rights | – | – |
| Non-allocated diversion: individual users | 7,325 | 14,670 |
| Allocated diversion: individual users | 9,130 | 5,004 |
| Transfer: inter-region | 3,792 | 3,540 |
| Groundwater outflows | 185,818 | 149,164 |
| Inter-region outflow | 0 | 0 |
| Inter-region coastal outflow | 134,657 | 124,561 |
| Discharge: landscape | – | – |
| Extraction: statutory rights | – | – |
| Non-allocated extraction: individual users | – | – |
| Allocated extraction: individual users | 20,312 | 24,603 |
| Other groundwater decreases | 30,849 | 0 |
| Urban water system outflows | 758,790 | 739,864 |
| Delivery: urban users | 386,197 | 390,311 |
| Delivery: irrigation | 8,970 | 11,868 |
| Discharge: sea | 301,846 | 267,248 |
| Discharge: landscape | 190 | 27 |
| Supply system transfer: inter-region | 1,071 | 431 |
| Supply system delivery: irrigation | 756 | 1,365 |
| Other supply system decreases | 11,717 | 15,574 |
| Recycled water delivery: urban users | 30,633 | 31,492 |
| Other wastewater decreases | 17,410 | 21,548 |
| Total water outflows | 2,368,051 | 1,667,173 |
| Unaccounted-for difference | (294,811) | (129,243) |
| Opening water storage | 584,129 | 589,364 |
| Change in water storage | 39,169 | (5,235) |
| Closing water storage | 623,298 | 584,129 |