| Abstract: | Water-quality data identify surface-water-quality problems in Bear Creek basin, Jackson County, Oreg., where possible, their causes or sources. Irrigation and return-flow data show pastures are sources of fecal coliform and fecal streptococci bacteria and sinks for suspended sediment and nitrite-plus-nitrate nitrogen. Bear Creek and its tributaries have dissolved oxygen and pH values that do not meet State standards. Forty to 50% of the fecal coliform and fecal streptococci concentrations were higher than 1,000 bacteria colonies per 100 milliliters during the irrigation season in the lower two-thirds of the basin. During the irrigation season, suspended-sediment concentrations, average 35 milligrams per liter, were double those for the nonirrigation season. The Ashland sewage-treatment plant is a major source of nitrite plus nitrate, ammonia, and Kjeldahl nitrogen, and orthophosphate in Bear Creek. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 11713 |
| Citation Author: | Wittenberg, Loren A.; McKenzie, Stuart W. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | viii, 130 p. ill., maps (1 fold. in pocket) ;27 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 80-158 |
| Citation Search Results Text: | Water quality of Bear Creek basin, Jackson County, Oregon; 1980; OFR; 80-158; Wittenberg, Loren A.; McKenzie, Stuart W. |
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| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | Water quality of Bear Creek basin, Jackson County, Oregon; 1980; OFR; 80-158; Wittenberg, Loren A.; McKenzie, Stuart W. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1980/0158/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1980/0158/report.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1980/0158/plate-1.pdf |
| URL (PLATE): | http://pubs.usgs.gov/of/1980/0158/plate-2.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
