Effects of Entrainment on Phytoplankton Primary Production at Four Thermal Electric Generating Stations on the Laurentian Great Lakes
✍ Scribed by Thomas G. Dunstall
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 744 KB
- Volume
- 70
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
Primary production was used to measure the response of phytoplankton to entrainment in once-through cooling water a t thermal electric generating stations. Ambient lakewater temperatures ranged from 1.0 to 20.5 "C. The maximum discharge temperature was 32.0 "C. There was no chlorination of cooling water a t the stations studied. On a few occasions, primary production was stimulated following station passage by discharge temperatures which were approximately 10 "C above ambient lakewater temperatures of 4.5 to 8.5 "C. Differences in production levels were not apparent, however, following the return of discharge water to ambient lakewater temperature. There was no consistent response of phytoplankton to the temperature regimes tested, with production levels generally differing by less than 20 O/ o as a result of station passage or temperature elevation alone. Entrainment was considered to have minimal impact on phytoplankton productivity in large open water bodies such as the Great Lakes.