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• 1. [Article] The historical Tualatin River Basin

  Citation × Citation Citation Abstract Copy Title: The historical Tualatin River Basin Author: Oregon State University. Water Resources Research Institute, Cass, Penny L., Miner, J. Ronald Title: The historical Tualatin River Basin Author: Oregon State University. Water Resources Research Institute, Cass, Penny L., Miner, J. Ronald Close

• 2. [Article] Farm effects on runoff quality in Oregon's Tualatin River Basin. Part I, Farm survey, Washington County, Oregon

  Citation × Citation Citation Abstract Copy Title: Farm effects on runoff quality in Oregon's Tualatin River Basin. Part I, Farm survey, Washington County, Oregon Author: Moberg, Dean P., Washington County Soil and Water Conservation District (Or.), Rambo, Neil L. Title: Farm effects on runoff quality in Oregon's Tualatin River Basin. Part I, Farm survey, Washington County, Oregon Author: Moberg, Dean P., Washington County Soil and Water Conservation District (Or.), Rambo, Neil L. Close

• 3. [Article] Landscape change in the Tualatin Basin following Euro-American settlement

  Citation × Citation Citation Abstract Copy Title: Landscape change in the Tualatin Basin following Euro-American settlement Author: Oregon State University. Water Resources Research Institute, Shively, David D. Title: Landscape change in the Tualatin Basin following Euro-American settlement Author: Oregon State University. Water Resources Research Institute, Shively, David D. Close

• 4. [Article] Evaluation of alternative pollution control strategies for the Tualatin River Basin, Oregon

  Citation × Citation Citation Abstract Copy Title: Evaluation of alternative pollution control strategies for the Tualatin River Basin, Oregon Author: Oregon State University. Water Resources Research Institute, Oregon. Dept. of Environmental Quality Title: Evaluation of alternative pollution control strategies for the Tualatin River Basin, Oregon Author: Oregon State University. Water Resources Research Institute, Oregon. Dept. of Environmental Quality Close

• 5. [Article] Response to comments received on the March 1993 Tualatin water quality study report

  Citation × Citation Citation Abstract Copy Title: Response to comments received on the March 1993 Tualatin water quality study report Author: Oregon State University. Water Resources Research Institute, Miner, J. Ronald Title: Response to comments received on the March 1993 Tualatin water quality study report Author: Oregon State University. Water Resources Research Institute, Miner, J. Ronald Close

• 6. [Article] Late winter 1992 sampling for water quality in three stream segments of the Tualatin River Basin, Oregon

  Citation × Citation Citation Abstract Copy Title: Late winter 1992 sampling for water quality in three stream segments of the Tualatin River Basin, Oregon Author: Oregon State University. Water Resources Research Institute, Vedanayagam, Samuel, Nelson, Peter O., Miner, J. Ronald, Oregon State University. Extension Service Title: Late winter 1992 sampling for water quality in three stream segments of the Tualatin River Basin, Oregon Author: Oregon State University. Water Resources Research Institute, Vedanayagam, Samuel, Nelson, Peter O., Miner, J. Ronald, Oregon State University. Extension Service Close

• 7. [Article] Urban residents and non-point source pollution : an examination of practices, influences, and values in the Tualatin watershed

  In July of 2001, the Environmental Protection Agency (EPA) activated the Total Maximum Daily Load (TMDLs) provisions of the Clean Water Act. As the first river in Oregon to implement TMDL regulations, ...

  Citation × Citation Citation Abstract Copy Title: Urban residents and non-point source pollution : an examination of practices, influences, and values in the Tualatin watershed Author: Nielson, Lisa M. In July of 2001, the Environmental Protection Agency (EPA) activated the Total Maximum Daily Load (TMDLs) provisions of the Clean Water Act. As the first river in Oregon to implement TMDL regulations, people and agencies in the Tualatin basin face many challenges. Non-point source pollution affects water quality in the Tualatin River and comes from various sources. This research focuses on urban home and yard maintenance practices. During 2002, I examined Best Management Practices (BMPs) that have been established for urban residents by water quality and conservation agencies. Employing a range of qualitative and quantitative methods, factors surrounding agency BMP adoption and agency goals for urban residential practices are investigated. Observation of actual home and yard maintenance styles are correlated with residents' explanation of maintenance styles and residents' expression of environmental and other values. In-depth interview and content analysis of websites and pamphlets show agency preferences which push for: low input lawns and yards, a realization of the environmental impacts of individual maintenance styles, and recognition of benefits of clean water to humans and the environment. Results from a survey of residents (n=98), direct observation (n= 183), and short interviews (n=22) suggest the presence of behaviors harmful to water quality and conservation efforts. Harmful behaviors appear to be supported by the importance of neighborhood appearance, a desire to protect property values, and a tendency to want to balance economic considerations and environmental consequences. Although agency goals include behavioral and value change, the lack of concern for environmental impact of maintenance styles in the survey population suggests the need for alternative educational efforts. A focus on non-environmental benefits of low input yard designs and maintenance that also promote neighborhood beauty will be key to the reduction of urban residential non-point source pollution in the Tualatin watershed. Title: Urban residents and non-point source pollution : an examination of practices, influences, and values in the Tualatin watershed Author: Nielson, Lisa M. In July of 2001, the Environmental Protection Agency (EPA) activated the Total Maximum Daily Load (TMDLs) provisions of the Clean Water Act. As the first river in Oregon to implement TMDL regulations, people and agencies in the Tualatin basin face many challenges. Non-point source pollution affects water quality in the Tualatin River and comes from various sources. This research focuses on urban home and yard maintenance practices. During 2002, I examined Best Management Practices (BMPs) that have been established for urban residents by water quality and conservation agencies. Employing a range of qualitative and quantitative methods, factors surrounding agency BMP adoption and agency goals for urban residential practices are investigated. Observation of actual home and yard maintenance styles are correlated with residents' explanation of maintenance styles and residents' expression of environmental and other values. In-depth interview and content analysis of websites and pamphlets show agency preferences which push for: low input lawns and yards, a realization of the environmental impacts of individual maintenance styles, and recognition of benefits of clean water to humans and the environment. Results from a survey of residents (n=98), direct observation (n= 183), and short interviews (n=22) suggest the presence of behaviors harmful to water quality and conservation efforts. Harmful behaviors appear to be supported by the importance of neighborhood appearance, a desire to protect property values, and a tendency to want to balance economic considerations and environmental consequences. Although agency goals include behavioral and value change, the lack of concern for environmental impact of maintenance styles in the survey population suggests the need for alternative educational efforts. A focus on non-environmental benefits of low input yard designs and maintenance that also promote neighborhood beauty will be key to the reduction of urban residential non-point source pollution in the Tualatin watershed. Close

• 8. [Article] Land use and nonpoint source phosphorus pollution in the Dairy-McKay hydrologic unit area of the Tualatin River Basin, Oregon

  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 ...

  Citation × Citation Citation Abstract Copy Title: Land use and nonpoint source phosphorus pollution in the Dairy-McKay hydrologic unit area of the Tualatin River Basin, Oregon Author: Wolf, Donald W. 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. In the Tualatin Basin of Oregon, nonpoint sources have been identified as contributing to phosphorus levels in the Tualatin River that exceed limits established in water quality regulations. The first section of this paper provides a review of relevant literature to explore connections between land use and the sources and transport of nonpoint source phosphorus into the Tualatin Basin. Additionally, where these connections exist, methods to alter existing land use practices to reduce phosphorus contributions are identified. The second section of this paper reviews and analyzes existing data gathered by agencies in the Tualatin Basin to look for evidence of connections between land use and the sources and transport of nonpoint source phosphorus. As one of the most obvious and influential connections, sediment-carried particulate phosphorus is examined both for its influence to the total phosphorus content of streams, and for evidence that it may become more influential as it is transported downstream. Data sets are also examined for seasonal effects and for interactions between phosphorus and other sampled water quality parameters. The third section is an examination and discussion of relevant social issues connected to nonpoint source phosphorus issues in the realization that any solution must be not only technically achievable, but also acceptable to society. Two surveys that attempt to describe the concerns of citizens, one for the general public and one for landowners, are reported. In addition, the problems of establishing regulatory control for a problem whose limits are still undefined is discussed. A philosophy of managementadaptive managementis discussed, and a program for controlling nonpoint source phosphorus in the Tualatin Basin that incorporate adaptive management principles is proposed. Finally, the issues surrounding which segments of society are responsible for paying for control are discussed. Title: Land use and nonpoint source phosphorus pollution in the Dairy-McKay hydrologic unit area of the Tualatin River Basin, Oregon Author: Wolf, Donald W. 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. In the Tualatin Basin of Oregon, nonpoint sources have been identified as contributing to phosphorus levels in the Tualatin River that exceed limits established in water quality regulations. The first section of this paper provides a review of relevant literature to explore connections between land use and the sources and transport of nonpoint source phosphorus into the Tualatin Basin. Additionally, where these connections exist, methods to alter existing land use practices to reduce phosphorus contributions are identified. The second section of this paper reviews and analyzes existing data gathered by agencies in the Tualatin Basin to look for evidence of connections between land use and the sources and transport of nonpoint source phosphorus. As one of the most obvious and influential connections, sediment-carried particulate phosphorus is examined both for its influence to the total phosphorus content of streams, and for evidence that it may become more influential as it is transported downstream. Data sets are also examined for seasonal effects and for interactions between phosphorus and other sampled water quality parameters. The third section is an examination and discussion of relevant social issues connected to nonpoint source phosphorus issues in the realization that any solution must be not only technically achievable, but also acceptable to society. Two surveys that attempt to describe the concerns of citizens, one for the general public and one for landowners, are reported. In addition, the problems of establishing regulatory control for a problem whose limits are still undefined is discussed. A philosophy of managementadaptive managementis discussed, and a program for controlling nonpoint source phosphorus in the Tualatin Basin that incorporate adaptive management principles is proposed. Finally, the issues surrounding which segments of society are responsible for paying for control are discussed. Close