Planning scenario | Drought | Very dry | Dry | Average | Wet |
Expected river conditions | - Infrequent, unregulated flow for reach 2 of the MacKenzie River, upper Burnt Creek and lower Mt William Creek
- Regulated releases provide flows at other times and locations
| - Periodic, unregulated flow for reach 2 of the MacKenzie River, upper Burnt Creek and lower Mt William Creek
- Regulated releases provide flows at other times and locations
| - Periodic, unregulated flow for reach 2 of the MacKenzie River, upper Burnt Creek and lower Mt William Creek
- Regulated releases provide flows at other times and locations, apart from modest passing flow
| - Regular, unregulated flow for reach 2 of the MacKenzie River, upper Burnt Creek and lower Mt William Creek
- Reasonable passing flow and unregulated releases for the Wimmera River and lower Mt William Creek
- Regulated releases provide flows at other times and locations
| - Regular, unregulated flow for reach 2 of the MacKenzie River, upper Burnt Creek and lower Mt William Creek
- Frequent passing flow and unregulated releases for the Wimmera River and lower Mt William Creek
- Regulated releases provide flows at other times and locations
|
Predicted supply of water for the environment1 | | | | | |
Wimmera River (targeting reach 4) |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
- Winter/spring low flow (one month)
- Summer/ autumn low flow (one month)
| - Winter/spring low flow (one month)
- Summer/ autumn low flow (two months)
| - Winter/spring low flow (two months)
- Small winter/ spring fresh (one fresh)
- Summer/ autumn low flow (three months)
- Summer/ autumn freshes (two freshes)
| - Winter/spring low flow (four months)
- Small winter/ spring freshes (three freshes)
- Summer/ autumn low flow (four months)
- Summer/ autumn freshes (two freshes)
| - Winter/spring low flow (four months)
- Small winter/ spring freshes (three freshes)
- Medium winter/ spring freshes (two freshes)
- Summer/ autumn low flow (four months)
- Summer/ autumn freshes (three freshes)
|
Tier 1b (supply deficit) |
- Winter/spring low flow (increased duration)
- Small winter/ spring fresh (one fresh)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn fresh (one fresh)
| - Winter/spring low flow (increased duration)
- Small winter/ spring fresh (one fresh)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn fresh (one fresh)
| - Winter/spring low flow (increased duration)
- Small winter/ spring freshes (three freshes)
- Medium winter/ spring freshes (two freshes)
- Summer/ autumn low flow (increased duration)
| - Winter/spring low flow (increased duration)
- Small winter/ spring freshes (five freshes)
- Medium winter/ spring freshes (two freshes)
- Summer/ autumn low flow (increased duration)
| - Winter/spring low flow (increased duration)
- Small winter/ spring freshes (two freshes)
- Medium winter/ spring fresh (one fresh)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (two freshes)
|
MacKenzie River (targeting reach 3)2 |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
- Winter/spring low flow (one month)
- Summer/ autumn low flow (one month)
- Summer/ autumn freshes (four freshes)
| - Winter/spring low flow (two months)
- Summer/ autumn low flow (one month)
- Summer/ autumn freshes (four freshes)
| - Winter/spring low flow (two months)
- Summer/ autumn low flow (two months)
- Summer/ autumn freshes (four freshes)
| - Winter/spring low flow (four months)
- Winter/spring fresh (one fresh)
- Summer/ autumn low flow (four months)
| - Winter/spring low flow (four months)
- Winter/spring fresh (one fresh)
- Summer/ autumn low flow (four months)
- Summer/ autumn fresh (one fresh)
|
Tier 1b (supply deficit) |
- Winter/spring low flow (increased duration)
- Winter/spring freshes (five freshes)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes, full magnitude)
| - Winter/spring low flow (increased duration)
- Winter/spring freshes (five freshes)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes, full magnitude)
| - Winter/spring low flow (increased duration)
- Winter/spring freshes (five freshes)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes, full magnitude)
| - Winter/spring low flow (increased duration)
- Winter/spring freshes (five freshes)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (four freshes)
| - Winter/spring low flow (increased duration)
- Winter/spring freshes (five freshes)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (four freshes)
|
Upper Burnt Creek |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
- Winter/spring low flow (one month)
- Summer/ autumn low flow (four months)
| - Winter/spring low flow (one month)
- Summer/ autumn low flow (four months)
| - Winter/spring low flow (one month)
- Summer/ autumn low flow (four months)
| - Winter/spring low flow
- Winter/spring freshes (five freshes, small)
- Summer/ autumn low flow (four months)
| - Winter/spring low flow
- Winter/spring freshes (five freshes, small)
- Summer/ autumn low flow (four months)
|
Tier 1b (supply deficit) |
- Winter/spring low flow (increased duration)
- Winter/spring fresh (one fresh, small)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes)
| - Winter/spring low flow (increased duration)
- Winter/spring freshes (two freshes, small)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes)
| - Winter/spring low flow (increased duration)
- Winter/spring freshes (three freshes, small)
- Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes)
| - Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes)
| - Summer/ autumn low flow (increased duration)
- Summer/ autumn freshes (three freshes)
|
Lower Burnt Creek |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
| |
Bungalally Creek |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
| |
Upper Mount William Creek |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
|
Lower Mount William Creek |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
| - Year-round low flow
- Summer/ autumn freshes (three freshes)
| - Year-round low flow
- Winter/spring fresh (one fresh)
- Summer/ autumn freshes (three freshes)
|
Potential environmental watering – tier 1 (high priorities) | Tier 1b (supply deficit) |
- Year-round low flow
- Summer/ autumn freshes (three freshes)
| - Year-round low flow
- Summer/ autumn freshes (three freshes)
| - Year-round low flow
- Summer/ autumn freshes (three freshes)
| - Year-round low flow (increased duration)
- Summer/ autumn freshes (increased duration)
| - Year-round low flow (increased duration)
- Winter/spring freshes (four freshes)
- Summer/ autumn freshes (increased duration)
|
Dock Lake |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
| - Winter/spring Partial fill
|
Ranch Billabong |
Potential environmental watering – tier 1 (high priorities) | Tier 1a (can be achieved with predicted supply) |
- Top-ups (winter/spring and summer/autumn) (one winter and one autumn top-up after drawing down if needed)
|
Possible volume of water for the environment required to achieve objectives | - 6,990 ML (tier 1a)
- 29,560 ML (tier 1b)
| - 7,990 ML (tier 1a)
- 28,560 ML (tier 1b)
| - 11,490 ML (tier 1a)
- 26,440 ML (tier 1b)
| - 16,490 ML (tier 1a)
- 21,370 ML (tier 1b)
| - 21,490 ML (tier 1a)
- 24,570 ML (tier 1b)
|
Priority carryover requirements1 | | | | | |