Page 162 - VEWH Seasonal Watering Plan 2020-21
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 4.3 Wimmera system
Table 4.3.1 Potential environmental watering actions and objectives for the Wimmera system (continued)
 Potential environmental watering action
  Functional watering objectives
  Environmental objectives
  Upper Burnt Creek
   Year-round low flow (one ML/day or natural, year- round)
  • Maintain edge habitats and shallow-water habitat for waterbugs
• Maintain soil moisture for streamside vegetation and near-permanent wetted stream channel for aquatic vegetation and to prevent the growth of terrestrial plants in the stream bed
• Maintain a sufficient area of pool habitat for native fish and crayfish populations
         Summer/autumn freshes (three freshes of 30 ML/ day for two to seven days during December to May)
   • Prevent a decline in water quality by flushing pools in the low flow season
• Allow fish to move throughout the reach
• Flush sediments from hard substrates to increase biofilm production and food for waterbugs
         Small winter/spring fresh (one to five freshes of
55 ML/day for three to seven days during June to November)
    • Allow fish to move throughout the reach
• Flush sediments from hard substrates to increase biofilm production and food for waterbugs
             Large winter/spring fresh (one to three freshes of 160 ML/day for one to three days during June to November)
   • Disturb biofilms present on rocks or woody debris, to stimulate new growth and provide food for waterbugs
• Allow fish to move throughout the reach
• Wet streamside vegetation to maintain plant condition and facilitate recruitment
           Lower Burnt Creek
    Bankfull fresh (one fresh of 45 ML/day for two days at any time)
  • Wet streamside vegetation to maintain plant condition and facilitate recruitment
• Move organic debris in the channel to support waterbugs
• Maintain the structural integrity of the channel
       Overbank fresh (one fresh of 90 ML/day for one day during August to November)
    • Wet floodplain vegetation to maintain plant condition and facilitate recruitment
• Move organic debris from the floodplain to support waterbugs in channel
• Maintain the structural integrity of the floodplain
         Bungalally Creek
    Bankfull (one fresh of 60 ML/day for two days at any time)
 • Wet the streamside zone to maintain its condition and facilitate the recruitment of streamside vegetation communities
• Maintain the structural integrity of the channel and prevent the loss of channel capacity
        Upper Mount William Creek
    Top-up pools (winter/spring and summer/autumn)
   • Maintain habitat for native fish and waterbugs
• Maintain water quality
• Trigger native fish spawning
               160 | Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21
 

























































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