Page 226 - VEWH Seasonal Watering Plan 2020-21
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 5.2 Victorian Murray system
Table 5.2.11 Potential environmental watering for the Hattah Lakes under a range of planning scenarios
 Planning scenario
  Drought
    Dry
  Average
  Wet
  Expected river conditions
 • Low flow year-round in the Murray River and no natural inflows to Hattah Lakes; substantial wetland drying will occur
   • Rare high-flow events in the Murray River and no natural inflows to Hattah Lakes; substantial wetland drying will occur
 • Short periods of high flow, most likely in late winter/spring, providing minor natural inflows to Hattah Lakes
   • Lengthy periods
of high flow with major spills from storages resulting in widespread wetting of Hattah Lakes and floodplain
   Potential environmental watering – tier 1 (high priorities)1
• Autumn/winter fill
of southern Hattah Lakes, targeting lakes Bulla, Hattah, Little Hattah, Lockie, Yewell and Yerang
  • Autumn/winter fill
of southern Hattah Lakes, targeting lakes Bulla, Hattah, Little Hattah, Lockie, Yewell and Yerang
• Autumn/winter fill
of southern Hattah Lakes, targeting lakes Bulla, Hattah, Little Hattah, Lockie, Yewell, Yerang, Arawak, Boich, Brockie, Konardin, Marramook, Mournpall, Nip Nip and Tullamook
  • Hattah Lakes (floodplain
inundation up to 45.0 m AHD)
 Potential environmental watering – tier 2 (additional priorities)
  • Autumn/winter
fill of southern Hattah Lakes, targeting lakes Arawak, Boich, Brockie, Konardin, Marramook, Mournpall, Nip Nip and Tullamook
 • Autumn/winter fill of southern Hattah Lakes, targeting lakes Bitterang and Cantala
  Possible volume of environmental water required to achieve objectives2
  • Up to 12,000 ML (tier 1)
  • 12,000 ML (tier 1)
• 18,000 ML (tier 2)
  • 30,000 ML (tier 1)
• 30,000 ML (tier 2)
  • Up to 125,000 ML (tier 1)3
  1 Tier 1 potential environmental watering at Hattah Lakes 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 Hattah Lakes.
2 Environmental water requirements for tier 2 actions are additional to tier 1 requirements.
3 In a wet scenario, it is expected that natural floods will meet most of the required watering actions, with environmental water making up shortfalls as needed.
    224 | Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21
 





























































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