Current and upcoming water for the environment deliveries….
Releases are dependent on many factors, and can often change, so it is important to keep up to date by checking back here regularly for the most current information.
Carran Carran (Thomson River)
This system has no current or scheduled water for environment releases.
Carran Carran (Thomson River) flows from the slopes of the Baw Baw Plateau to join Durt-Yowan (Latrobe River) south of Sale. The major tributaries of the Carran Carran (Thomson River) are the Aberfeldy and Jordan rivers in the upper reaches and Wirn wirndook Yeerung (Macalister River) in the lowest reach.
Two major structures regulate flow on the Carran Carran (Thomson River):
- Thomson Reservoir – the largest water supply storage for metropolitan Melbourne
- Cowwarr Weir – a regulating structure that supplies irrigation water to parts of the Macalister Irrigation District.
Previous environmental water deliveries in the Gippsland region, can be found here.
Page updated 12 August 2025
Durt’Yowan (Latrobe River) & Tanjil River
This system has no current or scheduled water for environment releases.
Previous environmental water deliveries in the Gippsland region, can be found here.
Page updated 12 August 2025
Wirn wirndook Yeerung (Macalister River)
The following environmental flows have been scheduled for Wirn wirndook Yeerung (Macalister River).
Delivery type – Winter continuous low flow
Start date: Tuesday 1 July 2025
End date: Thursday 14 August 2025
Maximum flow rate: * 90ML/d <0.5m downstream of Lake Glenmaggie
Peak flow dates: Continuous
Flow notes
A continuous 90ML/d flow provides a water depth that allows aquatic animals (e.g. platypus, fish and water bugs) to move easily between different in stream habitats in river sections upstream and downstream of Maffra Weir. During the irrigation season, this water depth is regularly provided through flow rules and consumptive water. However, this connectivity is not continuous during the reservoir filling period (June-Nov).
Please note:
- Flow rates and heights are estimates*
- Actual heights on the day may vary due to rainfall or irrigation water orders being delivered
- Environmental flow deliveries may be offset or replaced by natural rainfall/flow events
- In the case of a large rainfall event meeting our flow targets, an environmental flow may not be delivered.
This page will be updated if any changes occur or you can email eflows@wgcma.vic.gov.au, if you have any further queries.
Previous environmental water deliveries in the Gippsland region, can be found here.
Page updated 12 August 2025
