| Abstract: | A reconnaissance study of Coeur d‘Alene Lake, Idaho done from May through November 1987 assessed water quality throughout the lake. Particular emphasis was on hypolimnetic concentrations of dissolved oxygen, nutrients, and trace elements. Study results enabled refinement of the sampling protocol in a U.S. Geological Survey research proposal for a large-scale investigation of nutrient enrichment and trace element contamination problems affecting the 129.5 sq kilometer lake in northern Idaho. Hypolimnetic dissolved-oxygen concentrations as low as 4.1 mg/L in November and the frequent occurrence of supersaturated dissolved-oxygen concentrations during June through August indicated nutrient enrichment. Secchi-disc depths in the lake ‘s central and southern areas were typical of mesotrophic conditions, whereas oligotrophic conditions prevailed in the northern area. Throughout the study, hypolimnetic concentrations of total recoverable zinc exceeded chronic and acute toxicity criteria for freshwater aquatic life. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 30581 |
| Citation Author: | Woods, P. F. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iii, 56 p. :ill., maps ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 89-4032 |
| Citation Search Results Text: | Hypolimnetic concentrations of dissolved oxygen, nutrients, and trace elements in Coeur d‘Alene Lake, Idaho; 1989; WRI; 89-4032; Woods, P. F. |
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| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Hypolimnetic concentrations of dissolved oxygen, nutrients, and trace elements in Coeur d‘Alene Lake, Idaho; 1989; WRI; 89-4032; Woods, P. F. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1989/4032/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1989/4032/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
