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Issues surrounding the Biota of the Tualatin River Basin

Creator:: Li, Judith L., Gregory, Stanley V., and Oregon State University. Water Resources Research Institute
Abstract:: Tributaries of the Tualatin River cascade down high gradient slopes for relatively short distances, then flow into the low gradient mainstem which meanders for much of its length. The gentle, east-facing slopes of Oregon's Coast Range provide the geomorphic and climatic template for the watershed's patterns of discharge, water quality,...
Resource Type:: Technical Report
Full Text:: terrestrial communities. In the Tualatin River basin, much of the riparian habitat has been fragmented or

Late winter 1992 sampling for water quality in three stream segments of the Tualatin River Basin, Oregon

Creator:: Miner, J. Ronald, Nelson, Peter O., Vedanayagam, Samuel, Oregon State University. Water Resources Research Institute, and Oregon State University. Extension Service
Abstract:: The Tualatin River Basin in Washington County, Oregon has been identified by the Oregon Department of Environmental Quality (DEQ) as "Water Quality Limited." Algal blooms have become commonplace in the lower , reaches of. the river during summer months. Phosphorus has been identified as the nutrient upon which to base...
Resource Type:: Technical Report
Full Text:: . - Segments of the Tualatin River Basin, Orego n Oregon State University Extension Servic e Oregon Water

Modeling the Tualatin River system including Scoggins Creek and Hagg Lake: model description, geometry, and forcing data

Creator:: Wells, Scott A., Berger, Christopher, Knutson, Mike, and Oregon State University. Water Resources Research Institute
Abstract:: The goal of this phase of the study was to develop a model of the Tualatin River incorporating Scoggins Creek and Hagg Lake. This tool will be used in conjunction with a hydrologic model, the EPA HSPF model (Johnson, Imhoff, and Kittle, 1984), to analyze management strategies to improve water...
Resource Type:: Technical Report
Full Text:: loadings to the river, nor was QUAL2E able to evaluate stratification effects in Hagg Lake or in the

Selected elements and organic chemicals in bed sediment and fish tissue of the Tualatin River Basin, Oregon, 1992-96

Creator:: Bonn, Bernadine A., Washington County (Or.). Unified Sewerage Agency., and Geological Survey (U.S.)
Abstract:: 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 study were to: assess the occurrence and magnitude of trace element and selected organic contaminants in streams of...
Resource Type:: Technical Report

Response to comments received on the March 1993 Tualatin water quality study report

Creator:: Miner, J. Ronald and Oregon State University. Water Resources Research Institute
Abstract:: The pages which follow contain the authors responses to a series of comments that were received in response to "A Project to Collect Scientific Data and Provide Evaluation and Recommendations for Alternative Pollution Control Strategies for the Tualatin River Basin, 11 submitted to the Oregon Department of Environmental Quality (DEQ)...
Resource Type:: Technical Report
Full Text:: regulation . Cutting off unauthorized us e would leave this water in the river . f. The lease or purchase

Analysis of pollution control strategies for the Tualatin River

Creator:: Ervin, David E. and Oregon State University. Water Resources Research Institute
Abstract:: In response to Oregon House Bill 3338, the Oregon Department of Environmental Quality requested proposals in 1991 to assemble available information on Tualatin River Basin conditions to provide a scientific basis for improving river water quality. An interdisciplinary team of researchers from Oregon State University and Portland State University was...
Resource Type:: Technical Report
Full Text:: Trask River to the Tualati n River by expanding Barney Reservoir or by adding new storage on the Tras k

Summary and assessment of toxics data for the Tualatin River

Creator:: Khaodhiar, Sutha, Nelson, Peter O., and Oregon State University. Water Resources Research Institute
Abstract:: The Tualatin River is a major water resource for Washington County. In its course, the river drains forest lands, farmlands, and urban areas receiving toxic materials from non-point source runoff: Wastewater treatment plant effluents from municipalities and industries also contribute toxic materials to the river. Many materials discharged into the...
Resource Type:: Technical Report
Full Text:: Summary and Assessment o f Tonics Data for the Tualatin River August

Evaluation of alternative pollution control strategies for the Tualatin River Basin, Oregon

Creator:: Oregon State University. Water Resources Research Institute and Oregon. Dept. of Environmental Quality
Abstract:: This report summarizes the conclusions reached in "A Project to Collect Scientific Data and Provide Evaluation and Recommendations for Alternative Pollution Control Strategies for the Tualatin River Basin." This study was funded by the Oregon Department of Environmental Quality as a grant to the Oregon Water Resources Research Institute on...
Resource Type:: Technical Report
Full Text:: depleted oxygen concentrations cause stress or are lethal to much of the biological community in the River

The historical Tualatin River Basin

Creator:: Cass, Penny L., Miner, J. Ronald, and Oregon State University. Water Resources Research Institute
Abstract:: Dionysius said that history is philosophy learned from examples. As one of the original four counties of the Territory of Oregon, the Tualatin River Basin is rich in history. While still a prime agricultural region, the Tualatin Valley is one of the state's fastest developing areas. The slow accumulation of...
Resource Type:: Technical Report
Full Text:: ice dam across the Upper Columbia River gave way . The Missoula or Bretz floods filled the Willamette

Land use and nonpoint source phosphorus pollution in the Dairy-McKay hydrologic unit area of the Tualatin River Basin, Oregon

Creator:: Wolf, Donald W.
Abstract:: Human activities may contribute to the eutrophication of surface waters by providing nutrients to aquatic ecosystems. Phosphorus is frequently identified as a nutrient that is limiting to most aquatic ecosystems under natural conditions. Sources of phosphorus contributing to eutrophic conditions often include nonpoint sources that are dispersed across the landscape....
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Issues surrounding the Biota of the Tualatin River Basin

Late winter 1992 sampling for water quality in three stream segments of the Tualatin River Basin, Oregon

Modeling the Tualatin River system including Scoggins Creek and Hagg Lake: model description, geometry, and forcing data

Selected elements and organic chemicals in bed sediment and fish tissue of the Tualatin River Basin, Oregon, 1992-96

Response to comments received on the March 1993 Tualatin water quality study report

Analysis of pollution control strategies for the Tualatin River

Summary and assessment of toxics data for the Tualatin River

Evaluation of alternative pollution control strategies for the Tualatin River Basin, Oregon

The historical Tualatin River Basin

Land use and nonpoint source phosphorus pollution in the Dairy-McKay hydrologic unit area of the Tualatin River Basin, Oregon

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