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Victorian Environmental Water Holder

Edition 10: April - June 2013 watering actions

Welcome to the latest edition of the Victorian Environmental Water Holder’s (VEWH) Watering Update. This edition includes an update of environmental watering actions that happened across Victoria in April, May and June 2013.

A full list of VEWH Water Holdings is available in the Seasonal Watering Plan 2013-14 and at www.vewh.vic.gov.au.

The VEWH is an independent statutory body responsible for holding and managing environmental water entitlements in Victoria. The VEWH works with waterway managers (catchment management authorities and Melbourne Water), the Murray-Darling Basin Authority, the Commonwealth Environmental Water Office, storage managers and land managers to deliver environmental water.

In office news, two environmental water coordinators have been added to the VEWH team. Caitlin Davis will be starting with us in July, and Courtney Johnson will be on board in August. We look forward to working with them!

If you have any suggestions or feedback, or wish to subscribe to this update, please email kate.newton@vewh.vic.gov.au.

Image credit: Little Egret at Gunbower by North Central CMA

Watering recap Southern Victoria

Macalister River Source - West Gippsland CMA

Thomson system Where Thomson Reservoir release into Thomson River When Autumn baseflows from April to June; two autumn freshes during April and May What/how much Autumn baseflows targeted 230 ML/day; autumn freshes 800 ML/day for four days each, both at Coopers Creek gauging station Why Australian grayling spawning, habitat for aquatic fauna, facilitate fish movement and native fish migration Who West Gippsland CMA, Melbourne Water

Macalister system Where Lake Glenmaggie release to Macalister River When Autumn/winter baseflows from April to August; two autumn freshes during April and May

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What/how much Autumn/winter baseflows targeted 140 ML/day at Maffra Weir; autumn freshes targeted 350 ML/day for seven days each at Maffra Weir Why Australian grayling spawning, habitat for aquatic fauna, facilitate fish movement and native fish migration Who West Gippsland CMA, Southern Rural Water

Why Summer/autumn fresh: improve water quality, increase the availability of habitat for fish and macroinvertebrate communities between Upper Yarra Reservoir and Dights Falls Autumn high flow: assist Australian grayling spawning Who - Melbourne Water

Tarago system

Yarra system

Where Tarago Reservoir release into Tarago River

Where Maroondah and Upper Yarra reservoirs releases into Yarra River

When Began and ended late May 2013

When Summer/autumn fresh in early May and autumn high flow in late May 2013 What/how much Summer/autumn fresh: targeted flows of between 200 ML/day and 750 ML/day for two to three days

What/how much Targeted autumn high flow of 200 ML/day for one day Why Assist Australian grayling spawning Who Melbourne Water

Autumn high flow: targeted high flows of between 560 ML/day and 1,500 ML/day for seven days

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Werribee system Where Melton Reservoir release into Werribee River estuary

Western Victoria

When Began mid-April 2013 What/how much Targeted high flow fresh of 100 ML/day for one day Why Allow fish migration between freshwater reaches and estuary, improve lower reaches water quality, and inundate salt marsh vegetation communities Who Melbourne Water, Southern Rural Water

Moorabool system Where Release from Lal Lal Reservoir into the Moorabool River When: Summer low flows began in late March and continued to May 2013 What/how much Summer low flows targeted an average flow of 20 ML/day when combined with natural flows

Glenelg River Source - Stephen Ryan

Glenelg system Where Release from Rocklands Reservoir into the Glenelg River When Summer/autumn baseflows: began in December 2012 and will continue until June 2013 Summer/autumn fresh: began in late April 2013 What/how much Summer/autumn baseflows: targeted 16 ML/day at Dergholm Summer/autumn fresh: targeted 65 ML/day for six days at Harrow

Why To maintain water quality for water-dependent animal species including river blackfish

Why Improve water quality and maintain habitat for fish and other aquatic species.

Who Corangamite CMA, Barwon Water

Who Glenelg Hopkins CMA, Grampians-Wimmera-Mallee Water

Wimmera system Where Wimmera River - Release from Taylors Lake and Lake Lonsdale into the Wimmera River MacKenzie River - Release from Lake Wartook into the MacKenzie River When Summer/autumn baseflows from December 2012 to June 2013; freshes were delivered intermittently throughout this period

Thomson River Source - West Gippsland CMA

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What/how much Wimmera River: Summer/autumn baseflows targeted 5 ML/day at Lochiel, summer fresh delivered in early May targeted flows of 20 ML/day for seven days

Winter/spring baseflows - targeted 37 ML/day at Lochiel MacKenzie River: Summer/autumn baseflows targeted 2 ML/day at Dad and Dave Regulator Winter/spring baseflows targeted 37 ML/day at Distribution Heads Why Wimmera River: To maintain water quality and habitat for fish including the Flora and Fauna Guarantee Act-listed freshwater catfish MacKenzie River: To maintain water quality and vegetation communities as well as connectivity and habitat for fish and macroinvertebrates Who Wimmera CMA, Grampians-Wimmera-Mallee Water

Wimmera-Mallee wetlands Where Sawpit Swamp When Water was released into each wetland for varying timeframes during April and May 2013 What/how much Sawpit Swamp: 20 ML Why To inundate wetland vegetation to improve the condition of the wetlands; provide aquatic habitat for water-dependent species; and provide watering points for animals that live in the adjoining bushland Who Mallee CMA, Wimmera CMA, Grampians-Wimmera-Mallee Water

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Northern Victoria

Campaspe system Where Release from Lake Eppalock into the Campaspe River When Summer/autumn low flows: Began in December 2012 and continued to May 2013

Northern wetlands and floodplains and the Living Murray icon sites

Summer/autumn freshes: One fresh during April

Goulburn system Where Releases from Goulburn Weir into the Goulburn River When Began in February and will continue into July 2013 What/how much Targeted variable baseflows of up to 1,000 ML per day at McCoys Bridge Why Provide habitat and food resources for fish and macroinvertebrates Who Goulburn Broken CMA, Commonwealth Environmental Water Office, Murray-Darling Basin Authority, Goulburn-Murray Water

Broken Creek Where Release from the Murray and Goulburn systems into Broken Creek When Began September 2012 and continued until mid-May 2013 What/how much Targeted variable flow rates of up to 250 ML/day at Rices Weir Why Increase habitat for fish during their migration and breeding season and minimise risks to fish from low dissolved oxygen levels Who Goulburn Broken CMA, Commonwealth Environmental Water Office, Goulburn-Murray Water

What/how much Summer/autumn low flows: Targeted 20 ML/day at the Campaspe Siphon Summer/autumn freshes: Targeted 100 ML/day at the Campaspe Siphon Winter/spring low flows: Targeted 100 ML/day downstream of Lake Eppalock Why To maintain water quality, aquatic vegetation and habitat for macroinvertebrates and fish Who North Central CMA, Commonwealth Environmental Water Office, Goulburn-Murray Water

Where Cardross Basin 1 When Intermittent delivery from January to April 2013 What/how much Regular flows to maintain water and salinity levels in wetland (up to 1,000 ML total water use for whole year) Why To provide habitat for Murray hardyhead Who Mallee CMA

Loddon system

Where Sandilong Creek

Where Release from Loddon Weir into the Loddon River

When During May 2013

When Summer/autumn low flows: Began in December 2012 and continued to April 2013 Autumn/winter/spring low flows: Began in May and will continue to October

Why Promote resilience in the billabong system by continuing to support the river red gum and black box communities Who Mallee CMA

What/how much Summer/autumn low flows: Targeted 25 ML/day below Loddon Weir Autumn/winter/spring low flows: Targeted 100 ML/day below Loddon Weir Why To improve instream habitat, food sources for macroinvertebrates, channel form and reduce encroachment of terrestrial vegetation Who North Central CMA, Goulburn-Murray Water Round Lake Source - North Central CMA

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VEWH watering update edition 10, april june 2013