Hunter Valley water balance 2010/2011
| Water balance component | Sources of water | Distribution of water | % of volume measured | ||
|---|---|---|---|---|---|
| Volume (ML) | % of total | Volume (ML) | % of total | ||
Storage Volume |
|||||
| Combined volume in storage at start of year | 700,093 | ||||
| Volume in storage at end of period | 967,482 | ||||
| Change in storage | - | 0 | 267,390 | 20% | 100% |
| Barnard Reserve (4) | 11,524 | 1% | 11,524 | 1% | 100% |
| Spills | - | 100% | |||
| Storage net evaporation | 21,699 | 2% | 100% | ||
Inflows |
|||||
| Storage inflows (1) | 341,404 | 25% | 0% | 100% | |
| Downstream tributaries (2) | 1,013,396 | 74% | 0% | 60% | |
| Subtotal | 1,354,799 | 99% | 0% | ||
Net water diverted under riparian rights |
|||||
| Domestic and stock rights (3) | 5,400 | 0% | 0% | ||
| Native title rights | 0% | ||||
| Subtotal | 5,400 | 0% | |||
Net Water diverted under access licences |
|||||
| Domestic and stock | 526 | 0% | 100% | ||
| High security | 6,700 | 0% | 100% | ||
| General security | 35,693 | 3% | 100% | ||
| Local water utility | 6,149 | 0% | 100% | ||
| Major utility | 23,202 | 2% | 100% | ||
| Supplementary water | 43,239 | 3% | 100% | ||
| Subtotal | 115,509 | 8% | |||
Environmental water |
|||||
| Environmental flows (Plan) | 32,910 | 2% | 100% | ||
| End of water source flows (5) | 911,892 | 67% | 90% | ||
| Subtotal | 944,802 | 69% | |||
|
Other outflows |
|||||
| Unaccounted difference (6) | - | 0% | |||
| Total | 1,366,323 | 100% | 1,366,323 | 100% | |
Notes
- Calculated from Glenbawn and Glennies Creek Dams evaporation and releases, less storage drawdown and Barnard Reserve inflows.
- Downstream tributaries - assessed by mass balance at Greta -
- Basic rights are not metered. Values presented are those in the Water Sharing Plan.
- Barnard Reserve accumulates from an inter valley physical transfer. Volume for 2010-11. Total Barnard 52,389
- Gauged at Greta (not the end) - flows greater than environmental target are provided
- The actual combined regulated releases from Glenbawn and Glennies Creek Dams
Note: Controlled release for salinity dilution in April
