Upcoming Autumn flows
Two environmental flows are planned for this autumn in the Thomson and Macalister rivers.
The April fresh is intended to trigger the downstream spawning migration of adult native fish species, particularly Australian grayling (EPBC-listed species), eel species and Australian Bass and the May fresh is intended to trigger the upstream migration and recruitment of juvenile native fish species, particularly Australian grayling, eel species, Tupong, Australian Bass, lamprey and galaxiid species.
All details regarding these autumn flows that will occur in the Thomson River and the Macalister River, from Monday 17 April, 2023 are listed below.
Thomson River – (Carran Carran)
April fresh
Start and end of water release*
Monday 17 April to Saturday 29 April, 2023
Highest flow expected
800 megalitres per day between Wednesday 19 and Tuesday 25 April, 2023
Estimated water level in river during highest flow *
~0.6m at Coopers Creek
May Fresh
Start and end of water release*
Sunday 21 May to Tuesday 2 June, 2023
Highest flow expected
800 megalitres per day between Monday 22 and Sunday 28 May, 2023
Estimated water level in river during highest flow *
~0.6m at Coopers Creek
Latrobe River – (Durt-Yowan)
No upcoming flows scheduled.
Macalister River – (Wirn wirndook Yeerung)
April fresh
Start and end of water release*
Friday 21 April to Saturday 29 April, 2023
Highest flow expected
350 megalitres per day between Saturday 22 and Wednesday 26 April, 2023
Estimated water level in river during highest flow *
~<0.6m below Lake Glenmaggie
May Fresh
Start and end of water release*
Tuesday 30 May to Saturday 10 June, 2023
Highest flow expected
700 megalitres per day between Friday 2 and Tuesday 6 June, 2023
Estimated water level in river during highest flow *
~<0.7m below Lake Glenmaggie
Tanjil River
No upcoming flows scheduled.
Tyers River
No upcoming flows scheduled.
* Please note: Flow rates and heights are estimates, and actual heights on the day may vary due to rainfall or irrigation water orders being delivered. Also, 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.
If flows are cancelled or modified, our email list will be notified and a SMS sent to subscribers who have opted in for that feature.
This page will be updated if any changes occur or you can email eflows@wgcma.vic.gov.au if you have any further queries.
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Page updated 4 April, 2023
