EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/21/2019 | 9:45 AM - 10:00 AM | MITIGATION OF COLD WATER POLLUTION USING A NOVEL THERMAL CURTAIN: POTENTIAL EFFECTS ON FISH POPULATIONS | 250 CF
MITIGATION OF COLD WATER POLLUTION USING A NOVEL THERMAL CURTAIN: POTENTIAL EFFECTS ON FISH POPULATIONS
Cold water pollution occurs when hypolimnial water is released from large thermally stratified reservoirs; water released downstream can often be 12-16°C cooler than natural river temperatures. A novel, cost-effective ‘thermal curtain’ has been installed at Burrendong Dam in Australia to mitigate thermal pollution of the Macquarie River, where river temperature is often reduced by 16°C and rapid temperature changes can occur when water releases are transitioned from spillway to outlet releases. The goal of this research was to determine how the thermal curtain may affect the thermal regime of the river system and examine its possible effect upon larval freshwater fish survival, growth, development and physiology. If successful, similar structures could be used to mitigate cold water pollution in other affected regions. Experiments on three species of Australian larval freshwater fish measured growth and developmental responses to different water temperatures and determined the effect of rapid temperature reductions upon mortality and swimming ability. Larval fish growth was impeded at cooler temperatures, highlighting the importance of mitigation of cold water pollution. Rapid temperature reduction of 10°C caused almost complete immediate mortality; smaller reductions affected swimming ability and caused delayed mortality.
- Fish
- Mitigation
- Dams
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Presenters/Authors
Laura Michie
(), University of Technology Sydney, laura.michie@student.uts.edu.au;
ASHA DISCLOSURE:
Financial -
Nonfinancial -