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| Title | Diagnostic Study of Myron Lake, Yakima County, Washington, July 1988 through December 1989 | |||
| Month-Year Published | March 1990 | |||
| Online Availability |
2232 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
This report was coauthored by the Washington State Department of Ecology and the Washington State Department of Wildlife. A diagnostic study of Myron Lake was conducted between July 1988 and December 1989. The study was initiated to elucidate the causes of a fish kill that occurred in the fall of 1987. Fish kills in the fall of 1987, and again in 1988, were the result of low dissolved oxygen caused by mixing of anoxic water and oxidation of oxygen demanding materials from the hypolimnion with the whole lake at fall overturn. (Also see abstract below) | |||
| Publication Number | 90-e61 | |||
| Author(s) | Pelletier, G., N. Ekpoom, and E. Anderson | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version.
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| Number of pages | 62 pp. | |||
| Keywords | county, lake, study, water, water quality | |||
| Subject Waterbodies |
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| Abstract | Long Description |
This report was coauthored by the Washington State Department of Ecology and the Washington State Department of Wildlife. A diagnostic study of Myron Lake was conducted between July 1988 and December 1989. The study was initiated to elucidate the causes of a fish kill that occurred in the fall of 1987. Fish kills in the fall of 1987, and again in 1988, were the result of low dissolved oxygen caused by mixing of anoxic water and oxidation of oxygen demanding materials from the hypolimnion with the whole lake at fall overturn. Myron Lake is eutrophic due to excessive phosphorus loading via external (ground water and springs) and internal (anoxic hypolimnetic sediment release) sources. Phosphorus is the most limiting nutrient for algal productivity. Lake restoration techniques which emphasize direct control of hypolimnetic dissolved oxygen were suggested for prevention of future fish kills. Hypolimnetic aeration was proposed as a desirable method for maintaining sufficient dissolved oxygen and temperature in the hypolimnion for trout survival, and for reducing internal phosphorus recycling from anoxic lake sediments. The likelihood of future fish kills at fall overturn is expected to remain high unless an effective restoration technique is implemented. Based on results of the present study, a feasibility analysis of alternative restoration techniques is recommended. The costs and benefits of hypolimnetic aeration should be evaluated and compared with other potentially appropriate techniques. |
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This page last updated August 17, 2011
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