Page 167 - VEWH Seasonal Watering Plan 2020-21
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Table 4.3.2 Potential environmental watering for the Wimmera system under a range of planning scenarios (continued)
4.3 Wimmera system
 Planning scenario
   Extreme drought
    Drought
   Dry
   Average
   Wet
  Upper Mount William Creek
  • N/A
   • Top-ups
  • N/A
  • N/A
  • N/A
  Lower Mount William Creek
 • N/A
  • One summer/ autumn fresh
• Summer/ autumn low flow
• One winter/ spring fresh
 • Increased duration and magnitude summer/ autumn freshes
• Increased duration
summer/ autumn low flow
• Two winter/ spring freshes
• Increased duration winter/ spring low flow
 • Increased duration and magnitude winter/spring freshes Increased duration winter/ spring low flow
 • Increased duration and magnitude winter/spring freshes
• Increased duration winter/ spring low flow
 Potential environmental watering – tier 2 (additional priorities)
  Wimmera River reaches 2 & 3
   • N/A
    • N/A
   • N/A
   • Winter/spring low flow
   • Winter/spring low flow
  Wimmera River reach 4
  • N/A
   • N/A
  • Increased duration
summer/ autumn low flow
  • Increased duration
summer/ autumn low flow
• One large winter/spring fresh
  • Increased duration
summer/ autumn low flow
• One large winter/spring fresh
  MacKenzie River reach 3
 • N/A
  • N/A
 • Increased duration
summer/ autumn low flow
• One summer/ autumn fresh
 • Increased duration
summer/ autumn low flow
• Increased duration and magnitude summer/ autumn freshes
 • Increased duration
summer/ autumn low flow
• Increased duration and magnitude summer/ autumn freshes
 Lower Mount William Creek
  • N/A
  • N/A
   • Increased duration
summer/ autumn low flow
   • Increased duration
summer/ autumn low flow
   • Increased duration
summer/ autumn low flow
  Possible volume of environmental water required to achieve objectives2
  • 10,000 ML (tier 1a)
   • 11,900 ML (tier 1a)
• 6,680 ML (tier 1b)
  • 18,300 ML (tier 1a)
• 11,810 ML (tier 1b)
• 3,135 ML (tier 2)
  • 25,215 ML (tier 1a)
• 14,890 ML (tier 1b)
• 15,670 ML (tier 2)
  • 29,445 ML (tier 1a)
• 14,265 ML (tier 1b)
• 15,635 ML (tier 2)
  1 Environmental water in the Wimmera and Glenelg systems held by the VEWH is shared between the Wimmera and Glenelg river systems. Additionally, entitlement held by CEWH may become available in the Wimmera system. A prioritisation process will be undertaken with the Wimmera and Glenelg Hopkins CMAs to share available resources during 2020–21.
2 Water for the environment requirements for tier 2 actions are additional to tier 1 requirements.
 Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21 | 165
 
















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