Page 95 - VEWH Seasonal Watering Plan 2020-21
P. 95

 Table 3.2.1 Potential environmental watering actions and objectives for the Yarra River, Plenty River and Yarra billabongs (continued)
Potential environmental watering action
Plenty River
Winter/spring low flow (20 ML/day during June to November)
Winter/spring freshes (four freshes of 70 ML/day for three days during June
to November)
Billabong watering
Annulus Billabong
(partial fill in winter/spring)
Yering Backswamp (partial or complete fill in autumn and winter/spring)
Functional watering objectives
• Physically mix pools to minimise the risk of stratification and low oxygen • Maintain access to habitats for fish and waterbugs
• Wet bank vegetation to promote growth
• Scour sediment and biofilm from gravel in riffles
• Provide access to habitats for fish and waterbugs
• Wet native streamside vegetation on the banks of the river to promote growth
• Prime wetland for a fill
• Wet the wetland bed for up to three months to support the growth of threatened wetland plant species to rehabilitate shallow marsh, deep marsh and freshwater meadows
• Provide habitat for frogs, waterbugs and eels
• Wet the deepest parts of the wetland to about 80 cm to provide habitat for fish, frogs and waterbugs
• Wet remaining areas of wetland to about 40–60 cm to support the growth of threatened wetland plant species and encourage the regeneration of spreading aquatic herbs
Environmental objectives
Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21 | 93
3.2 Yarra system











































































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