Page 291 - VEWH Seasonal Watering Plan 2020-21
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Table 5.7.1 Potential environmental watering actions and objectives for the Loddon River system (continued)
5.7 Loddon system
 Potential environmental watering action
  Functional watering objectives
    Environmental objectives
   Pyramid Creek and Loddon River (reach 5)
   Spring high flow (one high flow of 700 ML/day for
10 days during September to October)
• Trigger the migration, spawning and recruitment of native fish species including Murray cod
• Maintain connectivity between habitats and improve water quality
         Autumn/winter low flow (90–200 ML/day during May to August)
    • Maintain connectivity between pools and provide habitat for fish and waterbugs outside of the irrigation season
• Improve water quality by reducing salinity levels
• Enhance the wetted area to maintain and promote the growth of fringing emergent (non-woody) vegetation along the lower banks of the channel
• Redistribute fine sediment on benches and bars
                 Autumn high flow (up to one high flow of 700–900 ML/day for 10 days during March to May)
 • Trigger the migration, spawning and recruitment of native fish species including Murray cod
• Facilitate the upstream movement of golden perch, silver perch and Murray cod older than one year
• Maintain connectivity between habitats and improve water quality
• Facilitate platypus dispersal
          1 The recommended magnitude and duration may be increased if needed to prevent a decline in oxygen levels.
2 Due to the potential wetting of private land, environmental flows above 450 ML per day in reach 4 will not be provided without the agreement of landholders who could potentially be affected.
3 Recommended magnitude may be increased if needed to prevent adverse declines in oxygen levels.
4 Winter/spring low flow of 50 ML per day is below the passing flow magnitude and will result in the VEWH banking passing flows savings, for use in other potential watering actions.
5 Flows in Serpentine Creek will be allowed to either return to the Loddon River or continue down Pennyroyal/Bannacher Creek or Nine Mile Creek with the agreement of landholders.
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