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Scientific Investigations Report 2010–5008

Use of Continuous Monitors and Autosamplers to Predict Unmeasured Water-Quality Constituents in Tributaries of the Tualatin River, Oregon

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Figure 12. Matrixes of scatter plots of calibration data from Dairy Creek at Highway 8 near Hillsboro, Oregon, using (A) Scenario 1 and (B) Scenario 2 datasets. Scenario 1 data were from autosampler deployments: storm 1, October 9, 2003; storm 2, November 19–20, 2003. Data sources for Scenario 2 include Clean Water Services ambient monitoring and autosamplers. Units for total suspended solids and total phosphorus are in milligrams per liter, and units for Escherichia coli (E. coli) bacteria are in colonies per 100 milliliter.

First posted June 18, 2010

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

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