Sale Common |
Top-up (anytime, following bird breeding event if required) | - Prolong wetting of reed beds to maintain habitat and food resources for nesting waterbirds and protect chicks from predators
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Partial fill (in July to August1 with top-ups as required to maintain water depth of at least 0.3 m Australian Height Datum [AHD] and surface coverage year-round) | - Encourage the growth and flowering of semi-aquatic plants
- Provide appropriate wetland habitat for frogs and turtles
- Provide conditions that support waterbug communities and food resources for waterbirds
- Discourage invasive plants, particularly the excessive spread of giant rush
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Fill (with top-ups as required during August to November, to maintain water depth of 0.4 to 0.5 m AHD for two months) | - Wet the outer boundaries of the wetland to support the growth and flowering of streamside and fringing wetland plants, increasing foraging opportunities for waterbirds
- Encourage bird and turtle breeding by providing nesting habitat
- Provide connectivity between the river and wetlands and increase habitat and feeding opportunities for frogs and turtles
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Trigger-based fill or top- up to 0.5m AHD (during December to January, if required to drown out invasive vegetation) | - Wet key habitats within the wetland for a sufficient duration to discourage invasive plants, particularly the excessive spread of giant rush
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Partial drawdown (during December to March) | - Oxygenate sediments to enable aquatic vegetation germination and recruitment
- Provide water level fluctuations for emergent vegetation reproduction and expansion (particularly swamp scrub and tall marsh)
- Break down organic matter and promote nutrient cycling
- Expose mudflats and create shallows to facilitate waterbird foraging
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Dowd Morass |
Top-up (any time, following bird breeding event if required) | - Prolong wetting of reed beds to maintain habitat and food resources for waterbirds and protect chicks from predators, following an observed breeding event
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Fill to control salinity (anytime) | - Dilute salt concentrations within the wetland that may be caused by king tides from Lake Wellington (likely occurring between March to May) or other sources
- This watering action is likely to be triggered1 if electrical conductivity is rising and reaches 7,000 μS/cm
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Partial fill (with top-ups as required to maintain surface coverage during July to December and April to June2) IMAGE | - Provide seasonal variation in water depth throughout the wetland to support the growth and flowering of semi-aquatic plants
- Wet vegetation and soils at middle elevations within the wetland to increase the abundance of waterbugs and other food resources for frogs, turtles and waterbirds
- Provide connectivity between the river and wetlands and between wetlands, increasing available habitat for frogs and turtles
- Support bird breeding (when delivered in spring/early summer following earlier fill) by maintaining wetted habitat around reed beds
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Fill (with top-ups as required to maintain water depth of 0.6m AHD during August to November) | - Wet reed beds and deep water next to reedbeds to provide waterbird nesting habitat and to stimulate bird breeding
- Wet high-elevation banks and the streamside zone to support vegetation growth, creating nesting habitat for waterbirds
- Wet vegetation and soils at higher elevations to stimulate ecosystem productivity and increase the abundance of waterbugs and other food resources for frogs, turtles and waterbirds
- Provide connectivity between the river and wetlands and between wetlands, increasing available habitat and food resources for frogs and turtles
- Reduce the impact of saltwater incursion from Lake Wellington
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Partial drawdown (during January to March) | - Oxygenate sediments to enable aquatic vegetation germination and recruitment
- Provide water level fluctuations for emergent vegetation reproduction and expansion (particularly swamp scrub and tall marsh)
- Break down organic matter and promote nutrient cycling
- Expose mudflats and create shallows to facilitate waterbird foraging
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Heart Morass |
Top-up to permanently maintain water level above -0.3 m AHD (anytime) | - Minimise the risk of acid sulfate soils developing by keeping known high- risk areas wet
- Respond to decreasing pH from the rewetting of exposed acid sulfate soils (most likely during high-wind events)
- Dilute salt concentrations within the wetland that may be caused by king tides from Lake Wellington or other sources. This watering action is likely to be triggered3 if wetland overtopping appears likely; based on rising water levels at Lake Wellington (reaching or exceeding +0.5m AHD)
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Top-up (anytime, following bird breeding event if required) | - Prolong wetting of reed beds to maintain habitat and food resources for waterbirds and protect chicks from predators, following an observed breeding event
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Fill and partial flushing flow (during July to November4) | - Wet high-elevation banks and streamside zone to support vegetation growth, creating nesting and foraging habitat for waterbirds, and provide food resources for terrestrial birds
- Provide connectivity between the river and wetlands and between wetlands, increasing available habitat and providing food resources for frogs and turtles
- Export accumulated salts and sulfates and allow the import and export of nutrients, dissolved organic carbon and seed dispersal between Durt- Yowan (Latrobe River) and Heart Morass
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Partial fill (with top-ups as required to maintain a minimum water depth 0.3 m AHD during August to December1 and April to June) | - Support the growth and flowering of semi-aquatic plants
- Provide appropriate wetland fringing habitat for frogs and turtles
- Provide conditions that support waterbug communities and food resources for frogs, turtles and waterbirds
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Partial drawdown (during January to March) | - Oxygenate sediments to enable aquatic vegetation germination and recruitment
- Provide water level fluctuations for emergent vegetation reproduction and expansion (particularly swamp scrub and tall marsh)
- Break down organic matter and promote nutrient cycling
- Expose mudflats and create shallows to facilitate waterbird foraging
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