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 5.7 Loddon system
Table 5.7.1 Potential environmental watering actions and objectives for the Loddon River system (continued)
 Potential environmental watering action
  Functional watering objectives
    Environmental objectives
   Serpentine Creek5
    Summer/autumn fresh (one to three freshes of 30–40 ML/day for one to three days during December to May)
    • Maintain the channel form by inundating benches
• Flush fine sediment and scour biofilms, to replenish the food supply
• Transport organic matter that has accumulated in the channel
• Provide flow variability to maintain the diversity of fringing vegetation
• Wet exposed woody habitat for waterbugs and provide a sufficient depth of water and variability of flow to maintain microbial biofilms
• Freshen water quality by diluting salt and oxygenating pools
            Winter/spring fresh
(one fresh of 40–150 ML/ day for two days during August to November)
 • Maintain the channel form and scour pools
• Provide connectivity for fish and waterbugs to access different habitat areas
• Transport organic matter that has accumulated in the channel, to increase productivity and reduce the risk of a hypoxic blackwater event in summer
• Provide a cue for adult platypus to construct burrows above the higher water level
              Summer/autumn low flow (10–20 ML/day during December to May)
    • Provide flow variability to prevent notching of riverbanks
• Provide connectivity between pools to allow the dispersal of small-to- medium-bodied native fish
• Wet exposed roots, leaf packs and woody debris, to provide habitat for aquatic animals
• Provide sufficient flow to maintain water quality by oxygenating pools
• Maintain foraging habitat for platypus
• Maintain the wetted area to support in-stream aquatic vegetation (such as water ribbons, eel weed and milfoil)
                 Winter/spring low flow (20–30 ML/day during June to November)
    • Maintain spawning habitat for native fish
• Wet exposed roots, woody debris, emergent vegetation and leaf packs, to provide habitat for aquatic animals
• Maintain water quality by preventing stagnation
• Provide flow variability, to prevent notching of riverbanks and maintain diversity of fringing vegetation
• Provide a sufficient depth of water and variability of flow to maintain microbial biofilms
               288 | Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21


































































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