<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Stuart W. McKenzie</dc:contributor>
  <dc:creator>Loren A. Wittenberg</dc:creator>
  <dc:date>1980</dc:date>
  <dc:description>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)</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/ofr80158</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey,</dc:publisher>
  <dc:title>Water quality of Bear Creek basin, Jackson County, Oregon</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>