Hunter Valley water balance report - 2011/2
| Water balance component | Sources of water | Distribution of water | % of volume measured | ||
|---|---|---|---|---|---|
| Volume (ML) | % of total | Volume (ML) | % of total | ||
Storage Volume |
|||||
| Volume in storage at start of year | 967,482 | ||||
| Volume in storage at end of year | 1028,260 | ||||
| Change in storage | - | 0% | 60,778 | 5% | 100% |
| Barnard Reserve (4) | - | 0% | - | 0% | 100% |
| Spills | 61,243 | 100% | |||
| Storage net evaporation | 30,016 | 2% | 100% | ||
Inflows |
|||||
| Storage inflows (1) | 303,515 | 25% | 100% | ||
| Downstream tributaries (2) | 977,226 | 75% | 50% | ||
| Subtotal | 1,280,740 | 100% | |||
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 | 303 | 0% | 100% | ||
| High security | 4,519 | 0% | 100% | ||
| General security | 13,525 | 1% | 100% | ||
| Local water utility | 5,639 | 0% | 100% | ||
| Major utility | 10,609 | 1% | 100% | ||
| Major utility (dilution) | (21442) | 0% | 100% | ||
| Supplementary water | 56,616 | 4% | 100% | ||
| Barnard Reserve (dilution) | (40482) | 0% | 100% | ||
| Subtotal | 152,775 | 12% | 100% | ||
Environmental water |
|||||
| Net diversions to wetlands | 38,108 | 3% | 100% | ||
| End of water source flows (5) | 993,663 | 78% | 90% | ||
| Subtotal | 1,031,771 | 81% | |||
Other outflows |
|||||
| Other outflows | |||||
| Unaccounted difference (6) | 0% | ||||
| Total | 1,280,740 | 100% | 1,280,740 | 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 - 793,410
- Basic rights are not metered. Values presented are those in the Water
- Barnalrd Reserve accumulates from an inter valley physical transfer. Volume for 2011-12 only.
- Gauged at Greta (not the end) - flows greater than environmental target are provided
- All unaccounted source flows included in tributary inflows
The actual combined dam regulated and spill releases were 151,477
Note: Controlled releases for salinity dilution in July, August, September and February
Note: Dilution flows were released from the dams, but not extracted and hence contributed to end of system flows
