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Scientific Investigations Report 2010–5008

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Prepared in cooperation with Clean Water Services

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

By Chauncey W. Anderson and Stewart A. Rounds

Tables

Table 1. Sampling sites and characteristics in tributaries of the Tualatin River basin, Oregon, 2002–04.

Table 2. U.S. Geological Survey guidelines for placement of autosampler intake.

Table 3. Results of laboratory quality-assurance tests of autosamplers.

Table 4.  Quality-assurance tests comparing samples collected using the autosampler with samples collected using depth- and width-integrating techniques, and testing carryover between sequential samples, Fanno and Dairy Creeks, Oregon.

Table 5. Constituents analyzed from water samples collected during stormflows,Tualatin River tributaries, Oregon, May 2002 to September 2004.

Table 6. Datasets showing laboratory sample results and summary statistics for scenarios used for calibration and validation of regression models with continuous monitors at Fanno Creek, Durham, Oregon.

Table 7. Datasets showing laboratory sample results and summary statistics for scenarios used for calibration and validation of regression models with continuous monitors at Dairy Creek at Highway 8 near Hillsboro, Oregon.

Table 8. Goodness-of-fit statistics used for evaluation of regression model predictions.

Table 9. Dates of autosampling and peak storm discharges at Tualatin River tributary sites, Oregon, spring 2002 to autumn 2003.

Table 10. Preliminary model statistics for correlation of total suspended solids with continuous parameters at Fanno Creek near Durham, Oregon.

Table 11. Preliminary model statistics for correlation of total phosphorus with continuous parameters at Fanno Creek near Durham, Oregon.

Table 12. Preliminary model statistics for correlation of Escherichia coli bacteria with continuous parameters at Fanno Creek near Durham, Oregon.

Table 13. Preliminary model statistics for correlation of total suspended solids with continuous parameters at Dairy Creek at Highway 8 near Hillsboro, Oregon, 2002–04.

Table 14. Preliminary model statistics for correlation of total phosphorus with continuous parameters at Dairy Creek at Highway 8 near Hillsboro, Oregon, 2002–04.

Table 15. Preliminary model statistics for correlation of Escherichia coli bacteria with continuous parameters at Dairy Creek at Highway 8 near Hillsboro, Oregon, 2002–04.

Table 16.  Preliminary functional model forms for total suspended solids, total phosphorus, and Escherichia coli bacteria at non-target tributary sites in the Tualatin River basin, Oregon, 2002–04.

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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