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Scientific Investigations Report 2009–5078

Assessment of Eutrophication in the Lower Yakima River Basin, Washington, 2004–07

Figure - refer to figure caption for alternative text description

Figure 19. Relation between periphytic algal biomass (chlorophyll a) and (A) dissolved inorganic nitrogen and (B) soluble reactive phosphorus in the Zillah reach of the Yakima River between RM 103 and 87, July–October 2006 and July–September 2007, and in the Naches River between RM 11.5 and 2.8, Washington, July–September 2007.

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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