USGS Scientific Investigations Report 2013–5103  - Application of the SPARROW Model to Assess Surface-Water Nutrient Conditions and Sources in the United States Pacific Northwest

Scientific Investigations Report 2013–5103 

Application of the SPARROW Model to Assess Surface-Water Nutrient Conditions and Sources in the United States Pacific Northwest

Figure 1. Major drainages, Hydrologic Unit Code (HUC6) watersheds, and primary land cover types in the United States Pacific Northwest.

First posted July 17, 2013

For additional information contact:
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U.S. Geological Survey
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Portland, Oregon 97201
http://or.water.usgs.gov

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