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Table 5.4.2 Potential environmental watering for the Goulburn River under a range of planning scenarios
5.4 Goulburn system
 Planning scenario
   Drought
   Dry
   Below average
   Average
   Wet
   Expected river conditions
  • No natural flow
• Blackwater could be an issue in the warmer months
 • Natural flow is expected to provide some low flow for half a month from winter/mid- spring and is likely to provide small, short winter/spring freshes
• Blackwater could be an issue in the warmer months
 • Natural flow is expected to provide some low flow for a few months from winter/mid- spring and is likely to provide small winter/ spring freshes
• Blackwater could be an issue in the warmer months
 • Natural flow is expected to provide low flow for most of the year and is likely to provide the winter/spring freshes
• Blackwater could be an issue in the warmer months
 • Natural flow is expected to provide low flow and multiple overbank flow events in winter/ spring
 • Normal minimum passing flows at reach 5 of 400 ML/day during July to October and 350 ML/day during November to June
 Expected availability of water for the environment1
   • 154,000 ML
   • 265,000 ML
   • 386,000 ML
   • 461,000 ML
      Potential environmental watering – tier 1a (high priorities)2
 • Year-round low flow
• Recession flow management
• Spring/autumn/ winter low flow (reach 1)
 • Year- round low flow
• Winter/spring fresh (partial)
• Recession flow management
• Spring/autumn / winter low flow (reach 1)
 • Year-round low flow
• Winter/spring fresh
• Recession flow management
• Spring/autumn/ winter low flow (reach 1)
• Extend natural flow events
 • Year-round low flow
• Winter/spring fresh
• Recession flow management
• Spring/autumn/ winter low flow (reach 1)
• Winter fresh 2021
• Spring/summer fresh
• Extend natural flow events
 • Year-round low flow
• Recession flow management
• Spring/autumn/ winter low flow (reach 1)
• Winter fresh 2021 (partial)
• Spring/summer fresh
• Extend natural flow events
 Potential environmental watering – tier 1b (high priorities with shortfall)
  • Winter/spring fresh (partial)
  • Winter/spring fresh
• Winter fresh 2021 (full)
• Spring/summer fresh
  • Winter fresh 2021 (full)
• Spring/summer fresh
  • N/A
  • N/A
 Potential environmental watering – tier 2 (additional priorities)
   • Winter/spring fresh
   • N/A
   • N/A
   • Autumn fresh (partial)
   • Autumn fresh (partial)
   Possible volume of environmental water required to achieve objectives3
 • 120,000 ML (tier 1)
• 107,000 ML (tier 1b)
• 28,000 ML (tier 2)
 • 234,000 ML (tier 1)
• 188,000 ML (tier 1b)
 • 366,000 ML (tier 1)
• 175,000 ML (tier 1b)
 • 388,000 ML (tier 1)
• 47,000 ML (tier 2)
 • 316,000 ML (tier 1)
• 47,000 ML (tier 2)
 Priority carryover requirements
   • 23,000 ML
   • 23,000 ML
   • 23,000 ML
   • 0 ML
   • 0 ML
  1 When trading opportunities are available, additional water for the environment allocations from the Murray River can be transferred in to meet Goulburn demand.
2 Low-flow periods following a spring fresh or between summer/autumn pulses are considered tier 1a priorities under all planning scenarios. 3 Environmental water requirements for tier 2 actions are additional to tier 1 requirements.
 Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21 | 253
 












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