| Abstract: | An intensive monitoring program of Black Earth Creek and its tributaries, in southern Wisconsin was conducted from October 1983 through September 1986, to define aquatic macrophytes, water quality, and the hydrologic factors that affect trout populations. Streamflows for water years 1985 and 1986 were 44 and 60% greater than the long-term average (1955-86). The highest average annual discharge since 1954, 53.4 cu ft/sec, was recorded in water year 1986. The data indicate that trout populations may be related to average annual streamflow because of greater water volumes and colder water temperature. Summer storm runoff resulted in decreased dissolved-oxygen content in two streams studied. During one storm, dissolved oxygen in Black Earth Creek decreased 3.0 mg/L and was less than 6.0 mg/L (the minimum State standard for trout) for 30 hours. Aquatic macrophyte biomass in Black Earth Creek was substantially less in 1986 than in 1985 because of substrate scouring from a flood in July 1985. Discharge from point and nonpoint sources affects Black Earth Creek ‘s water quality. Warm water discharged from a gravel pit increased water temperatures from 2 C to 4 C. Detention ponds in the Brewery Creek basin appear to effectively control suspended-sediment and phosphorus runoff during periods of moderate runoff; this basin had the highest concentration of suspended sediment and total phosphorus but did not have the highest yields of the basins studied. Suspended-sediment yields in water year 1985 were 29% greater than the 12-year-average yields (1955-65, 1985). (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 27087 |
| Citation Author: | Field, S. J.; Graczyk, D. J. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | vi, 38 p. :ill. ;28 cm. |
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| Citation Publisher: | Dept. of the Interior, U.S. Geological Survey ;
Books and Open-File Reports Section [distributor], |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 89-4089 |
| Citation Search Results Text: | Hydrology, aquatic macrophytes, and water quality of Black Earth Creek and its tributaries, Dane County, Wisconsin, 1985-86; 1990; WRI; 89-4089; Field, S. J.; Graczyk, D. J. |
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| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Hydrology, aquatic macrophytes, and water quality of Black Earth Creek and its tributaries, Dane County, Wisconsin, 1985-86; 1990; WRI; 89-4089; Field, S. J.; Graczyk, D. J. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1989/4089/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1989/4089/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | Dept. of the Interior, U.S. Geological Survey ;
Books and Open-File Reports Section [distributor], |
