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Historic stream surveys
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Author
Geological Survey (U.S.)
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Trace elements
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1. [Article] Selected elements and organic chemicals in bed sediment and fish tissue of the Tualatin River Basin, Oregon, 1992-96
The U.S. Geological Survey (USGS) has worked cooperative with the Unified Sewerage Agency of Washington County (USA) since 1990 to assess water quality in the Tualatin River Basin. The objectives of this ...Citation -
2. [Article] Major-ion, nutrient, and trace-element concentrations in the Steamboat Creek Basin, Oregon, 1996
This report presents the concentrations of major ions, nutrients, and trace elements in water and bottom sediments collected in the four-tributaries during the low-flow condition of September 9-13, 1996. ...Citation