Page 258 - VEWH Seasonal Watering Plan 2020-21
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 5.4 Goulburn system
Table 5.4.3 Potential environmental watering actions and objectives for the Goulburn wetlands
 Potential environmental watering action
  Functional watering objectives
  Environmental objectives
  Doctors Swamp
(top up or fill in spring)
• Promote vegetation growth
• Provide feeding and roosting habitat for waterbirds
       Gaynor Swamp (partial fill in spring)
 • Promote vegetation growth, particularly southern cane grass
• Provide breeding and feeding habitat for waterbirds, in particular for brolga
        Horseshoe Lagoon (fill in winter)
    • Maintain wetland vegetation communities by supporting growth and recruitment
• Promote the growth of river swamp wallaby grass
• Provide habitat for turtle and frog populations
          Kanyapella Basin (partial fill in spring)
   • Promote different vegetation communities to establish
    Loch Garry
(partial fill in autumn)
   • Promote the growth and germination of native wetland vegetation communities, particularly wetland fringes
• Provide feeding and breeding habitat for waterbirds
      Reedy Swamp (fill in autumn)
 • Reduce the growth of exotic plants
• Maintain native wetland vegetation
• Provide a refuge and feeding and breeding habitat for waterbirds
       Scenario planning
Table 5.4.4 outlines the potential environmental watering and expected water use under a range of planning scenarios.
Doctors Swamp and Gaynor Swamp are identified as high-priority watering sites in 2020–21 under all scenarios, because their drying regimes are reaching their maximum duration. Gaynor Swamp will also provide feeding and breeding habitat for threatened waterbirds (such as brolga). Horseshoe Lagoon is a high priority, because it requires follow-up watering to maintain vegetation condition.
Reedy Swamp and Loch Garry have also been identified for watering under all scenarios and Kanyapella basin under dry and average scenarios. These watering actions aim to improve environmental values at these sites, but if delivery to these wetlands cannot occur in 2020–21, no detrimental impact is expected on their environmental values in the upcoming year. Reedy Swamp is in good condition and is currently in a drying phase. An autumn watering in 2021 will aim to ensure it does not exceed its maximum dry period, and it will provide variability in the watering regime for native vegetation.
Loch Garry and Kanyapella Basin act as flood retardation basins, and watering in autumn 2020 occurred at Loch Garry as an initial trial, to observe the ecological response and help determine future management actions. Loch Garry is now planned to remain dry for the recommended duration, which will enable it to potentially be re-watered in autumn 2021 to observe the response of the ecological values of the site to a follow up watering.
It is a priority to carry over water, to allow 2021–22 top-ups to tier 1 wetlands planned to be watered in 2020–21.
    256 | Victorian Environmental Water Holder | Seasonal Watering Plan 2020–21

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