Page 213 - VEWH Seasonal Watering Plan 2020-21
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Table 5.2.6 Potential environmental watering for Gunbower Creek and Forest under a range of planning scenarios
5.2 Victorian Murray system
 Planning scenario
   Drought
   Dry
   Average
  Wet
  Expected river conditions
  • No natural inflows into Gunbower Forest
  • No natural inflows into Gunbower Forest
  • Minor natural inflows into Gunbower Forest may occur in winter/spring
  • Overbank flows are likely in winter/spring
   Potential environmental watering – tier 1 (high priorities)1
   Gunbower Forest
 • Reedy Lagoon (winter/spring)
• Black Swamp (winter/spring)
• Trigger-based top- up permanent and semi-permanent wetlands
• Reedy Lagoon (autumn/winter)
• Black Swamp (autumn/winter)
 • Reedy Lagoon (winter/spring)
• Black Swamp (winter/spring)
• Trigger-based top- up permanent and semi-permanent wetlands
• Reedy Lagoon (autumn/winter)
• Black Swamp (autumn/winter)
• Yarran Creek
• Little Gunbower wetland complex
• Little Reedy wetland complex
• Gunbower Forest floodplain, floodrunners and wetlands
 • Reedy Lagoon (winter/spring)
• Black Swamp (winter/spring)
• Trigger-based top- up permanent and semi-permanent wetlands
• Reedy Lagoon (autumn/winter)
• Black Swamp (autumn/winter)
• Yarran Creek
• Little Gunbower wetland complex
• Little Reedy wetland complex
• Extend natural flooding by
wetting Gunbower Forest floodplain, floodrunners and wetlands
• Gunbower Forest floodplain, floodrunners and wetlands
 • Reedy Lagoon (winter/spring)
• Black Swamp (winter/spring)
• Trigger-based top- up permanent and semi-permanent wetlands
• Reedy Lagoon (autumn/winter)
• Black Swamp (autumn/winter)
• Yarran Creek
• Little Gunbower wetland complex
• Little Reedy wetland complex
• Extend natural flooding by
wetting Gunbower Forest floodplain, floodrunners and wetlands
 Gunbower Creek
   • Gunbower Creek winter low flow
• Gunbower Creek spring/summer/ autumn low flow
   • Gunbower Creek winter low flow
• Gunbower Creek spring/summer/ autumn low flow
   • Gunbower Creek winter low flow
• Gunbower Creek spring/summer/ autumn low flow
   • Gunbower Creek winter low flow
• Gunbower Creek spring/summer/ autumn low flow
   Potential environment watering – tier 2 (additional priorities)
   Gunbower Forest
  • Yarran Creek
• Little Gunbower wetland complex
• Little Reedy wetland complex
  • n/a
  • n/a
  • Gunbower Forest floodplain, floodrunners and wetlands
 Gunbower Creek
   • n/a
   • n/a
   • n/a
   • Gunbower Creek autumn/winter fresh
   Possible volume of environmental water required to achieve objectives2,3
 • 21,500 ML (tier 1)
• 7,500 ML (tier 2)
  • 50,000 ML (tier 1)
  • 51,500 ML (tier 1)
  • 36,500 ML (tier 1)
• 31,000 ML (tier 2)
  Priority carryover requirements
  • 21,000 ML to 56,000 ML4
   1 Tier 1 potential environmental watering at Gunbower Creek and Gunbower Forest is not classified as tier 1a or 1b because the water available for use is shared across various systems and it is not possible to reliably determine the supply specifically available for Gunbower Creek and Gunbower Forest.
2 Environmental water requirements for tier 2 actions are additional to tier 1 requirements.
3 These estimates take account of the use of operational water en route to achieve watering action targets (except for discrete wetland watering actions), with water for the environment being required to underwrite the associated losses in Gunbower Creek and Gunbower Forest.
4 Carryover volumes take into account that wetting of Gunbower Forest floodplain, floodrunners and wetlands has started in autumn/winter 2021 and will require sufficient volumes of carryover to complete the watering action in winter/spring 2021. If no floodplain watering action commences in autumn/winter 2021, this volume is subject to change.
Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21 | 211
 













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