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• 1. [Article] Benefits and costs of riparian habitat improvement in the Tualatin River Basin

  Citation × Citation Citation Abstract Copy Title: Benefits and costs of riparian habitat improvement in the Tualatin River Basin Author: Knoder, Erik, Oregon State University. Water Resources Research Institute Title: Benefits and costs of riparian habitat improvement in the Tualatin River Basin Author: Knoder, Erik, Oregon State University. Water Resources Research Institute Close

• 2. [Article] Estimated costs of reducing nonpoint phosphorus loads from agricultural land in the Tualatin Basin, Oregon

  Citation × Citation Citation Abstract Copy Title: Estimated costs of reducing nonpoint phosphorus loads from agricultural land in the Tualatin Basin, Oregon Author: Oregon State University. Water Resources Research Institute, Wood, Mary, Cross, Timothy L. Title: Estimated costs of reducing nonpoint phosphorus loads from agricultural land in the Tualatin Basin, Oregon Author: Oregon State University. Water Resources Research Institute, Wood, Mary, Cross, Timothy L. Close

• 3. [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

• 4. [Article] An analysis of water quality data in Tualatin River tributaries with three different land uses

  Citation × Citation Citation Abstract Copy Title: An analysis of water quality data in Tualatin River tributaries with three different land uses Author: Oregon State University. Water Resources Research Institute, Miner, J. Ronald, Scott, Eric F. Title: An analysis of water quality data in Tualatin River tributaries with three different land uses Author: Oregon State University. Water Resources Research Institute, Miner, J. Ronald, Scott, Eric F. Close

• 5. [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

• 6. [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

• 7. [Article] Management of over-utilized streams : lessons from the Tualatin Watershed

  Published March 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog...

  Citation × Citation Citation Abstract Copy Title: Management of over-utilized streams : lessons from the Tualatin Watershed Author: Oregon State University. Water Resources Research Institute, Oregon State University. Extension Service Published March 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Management of over-utilized streams : lessons from the Tualatin Watershed Author: Oregon State University. Water Resources Research Institute, Oregon State University. Extension Service Published March 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 8. [Article] Modeling the Tualatin River system including Scogging Creek and Hagg Lake: model description, geometry, and forcing data

  Citation × Citation Citation Abstract Copy Title: Modeling the Tualatin River system including Scogging Creek and Hagg Lake: model description, geometry, and forcing data Author: Knutson, Mike, Wells, Scott A., Oregon State University. Water Resources Research Institute, Berger, Christopher Title: Modeling the Tualatin River system including Scogging Creek and Hagg Lake: model description, geometry, and forcing data Author: Knutson, Mike, Wells, Scott A., Oregon State University. Water Resources Research Institute, Berger, Christopher Close

• 9. [Article] A project to collect scientific data and provide evaluation and recommendations for alternative pollution control stratagies for the Tualatin River Basin

  Citation × Citation Citation Abstract Copy Title: A project to collect scientific data and provide evaluation and recommendations for alternative pollution control stratagies for the Tualatin River Basin Author: Oregon State University. Water Resources Research Institute, Oregon. Dept. of Environmental Quality Title: A project to collect scientific data and provide evaluation and recommendations for alternative pollution control stratagies for the Tualatin River Basin Author: Oregon State University. Water Resources Research Institute, Oregon. Dept. of Environmental Quality Close

• 10. [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

• 11. [Article] Estimating the frequency and quantity of surface runoff within the Tualatin River Basin

  Citation × Citation Citation Abstract Copy Title: Estimating the frequency and quantity of surface runoff within the Tualatin River Basin Author: Taylor, George H., Klingeman, Peter C., Oregon State University. Water Resources Research Institute, Miner, J. Ronald Title: Estimating the frequency and quantity of surface runoff within the Tualatin River Basin Author: Taylor, George H., Klingeman, Peter C., Oregon State University. Water Resources Research Institute, Miner, J. Ronald Close

• 12. [Article] Land use and nonpoint source phosphorus pollution in the Tualatin Basin, Oregon : a literature review

  Citation × Citation Citation Abstract Copy Title: Land use and nonpoint source phosphorus pollution in the Tualatin Basin, Oregon : a literature review Author: Oregon State University. Water Resources Research Institute, Oregon State University. Extension Service, Wolf, Donald W. Title: Land use and nonpoint source phosphorus pollution in the Tualatin Basin, Oregon : a literature review Author: Oregon State University. Water Resources Research Institute, Oregon State University. Extension Service, Wolf, Donald W. Close

• 13. [Article] Agricultural land use in the Tualatin Basin

  Citation × Citation Citation Abstract Copy Title: Agricultural land use in the Tualatin Basin Author: Oregon State University. Water Resources Research Institute, Wood, Mary, Warkentin, Benno P., Scott, Eric F. Title: Agricultural land use in the Tualatin Basin Author: Oregon State University. Water Resources Research Institute, Wood, Mary, Warkentin, Benno P., Scott, Eric F. Close

• 14. [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

• 15. [Article] Mass balance analysis of suspended solids in the Tualatin River

  Citation × Citation Citation Abstract Copy Title: Mass balance analysis of suspended solids in the Tualatin River Author: Oregon State University. Water Resources Research Institute, Vedanayagam, Samuel, Nelson, Peter O. Title: Mass balance analysis of suspended solids in the Tualatin River Author: Oregon State University. Water Resources Research Institute, Vedanayagam, Samuel, Nelson, Peter O. Close

• 16. [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

• 17. [Article] Summary and assessment of toxics data for the Tualatin River

  Citation × Citation Citation Abstract Copy Title: Summary and assessment of toxics data for the Tualatin River Author: Oregon State University. Water Resources Research Institute, Nelson, Peter O., Khaodhiar, Sutha Title: Summary and assessment of toxics data for the Tualatin River Author: Oregon State University. Water Resources Research Institute, Nelson, Peter O., Khaodhiar, Sutha Close

• 18. [Article] Analysis of pollution control strategies for the Tualatin River

  Citation × Citation Citation Abstract Copy Title: Analysis of pollution control strategies for the Tualatin River Author: Oregon State University. Water Resources Research Institute, Ervin, David E. Title: Analysis of pollution control strategies for the Tualatin River Author: Oregon State University. Water Resources Research Institute, Ervin, David E. Close

• 19. [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 × Citation Citation Abstract Copy Title: Selected elements and organic chemicals in bed sediment and fish tissue of the Tualatin River Basin, Oregon, 1992-96 Author: Bonn, Bernadine A., Washington County (Or.). Unified Sewerage Agency., Geological Survey (U.S.) 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 the Tualatin River Basin; compare contaminant levels found in Tualatin River Basin streams with published guidelines for the protection of aquatic life; place the contaminant levels found in the Tualatin River Basin streams in context, regionally and nationally, by comparing them with those found in the Willamette Basin and by the USGS National Water-Quality Assessment (NAWQA) Program; compare contaminant concentrations in bed sediment with those in fish tissue; and identify contaminant patterns that would help managers make decisions regarding future monitoring and the implementation of pollution prevention and abatement programs. Title: Selected elements and organic chemicals in bed sediment and fish tissue of the Tualatin River Basin, Oregon, 1992-96 Author: Bonn, Bernadine A., Washington County (Or.). Unified Sewerage Agency., Geological Survey (U.S.) 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 the Tualatin River Basin; compare contaminant levels found in Tualatin River Basin streams with published guidelines for the protection of aquatic life; place the contaminant levels found in the Tualatin River Basin streams in context, regionally and nationally, by comparing them with those found in the Willamette Basin and by the USGS National Water-Quality Assessment (NAWQA) Program; compare contaminant concentrations in bed sediment with those in fish tissue; and identify contaminant patterns that would help managers make decisions regarding future monitoring and the implementation of pollution prevention and abatement programs. Close

• 20. [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

• 21. [Article] We all live downstream

  Published 1996. Declared out of print June 2009. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extens...

  Citation × Citation Citation Abstract Copy Title: We all live downstream Author: Ragozzino, Ed, Oregon State University. Extension Service, Dodrill, Steve Published 1996. Declared out of print June 2009. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: We all live downstream Author: Ragozzino, Ed, Oregon State University. Extension Service, Dodrill, Steve Published 1996. Declared out of print June 2009. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 22. [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

• 23. [Article] Projecting farm income effects of sewage sludge utilization in the Tualatin Basin of Oregon

  Published December 1977. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/cata...

  Citation × Citation Citation Abstract Copy Title: Projecting farm income effects of sewage sludge utilization in the Tualatin Basin of Oregon Author: Schotzko, Ralph T., Oregon State University. Agricultural Experiment Station Published December 1977. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Projecting farm income effects of sewage sludge utilization in the Tualatin Basin of Oregon Author: Schotzko, Ralph T., Oregon State University. Agricultural Experiment Station Published December 1977. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 24. [Article] Implementing best management practices in small commercial and non-commercial animal enterprises

  Small commercial and non-commercial animal enterprises (SCAEs) raise a few beef cows, horses, pigs, sheep, poultry, and other animals on a few acres. These enterprises are often located in suburban areas ...

  Citation × Citation Citation Abstract Copy Title: Implementing best management practices in small commercial and non-commercial animal enterprises Author: Godwin, Derek C. Small commercial and non-commercial animal enterprises (SCAEs) raise a few beef cows, horses, pigs, sheep, poultry, and other animals on a few acres. These enterprises are often located in suburban areas of watersheds and show potential for degrading water quality through to increased bacterial, nitrogen, and phosphorus concentrations. SCAEs implement Best Management Practices (BNIPs) on a voluntary basis to control their water quality impacts. Off-stream watering areas, with animal access to streams, and covered manure storages are two BMPs which were analyzed in this thesis for effectiveness in reducing bacteria, nitrogen, and phosphorus from entering surface and groundwater in four SCAEs. The four cooperating SCAEs were located in the Tualatin River Basin, and the potential water quality improvements from implementing these two practices in all SCAEs in the basin were discussed. The BMP analyses use results from several studies. Two of these studies analyzed off-stream watering areas for reducing time animals spend watering at the stream. This time was measured and used to estimate the manure defecated in the stream. Reducing time animals spend at the stream decreases direct defecations in the stream and reduces water quality impacts of SCAEs. A third study analyzed a pasture pump as a possible off-stream watering device. It was analyzed for its ability to provide water to 27 Holstein dairy heifers without limiting water consumption. Daily water consumption from the pasture pump was not significantly different than daily consumption from an open water trough. A fourth study predicted the rainfall required to produce runoff from pastured areas in the Dairy-McKay Hydrological Unit Area within the Tualatin River Basin. These required rainfall amounts and runoff frequency were predicted for summer and winter soil conditions. The BMPs were analyzed for a variety of wet and dry conditions during the summer and winter. Off-stream watering areas were most effective in reducing water quality impacts of SCAEs for dry conditions during the summer and winter, while the covered manure storages were most effective during winter days of continuous rain. Off-stream watering areas reduced the time animals spent at the stream by 75%. Consequently, defecations at the stream were assumed to be reduced 75% and the SCAEs'water quality impacts decreased. Covered manure storages protect manure piles from rain and surface water runoff and prevent bacteria and nutrients from entering the stream or leaching to groundwater regardless of the weather. However, the amount prevented varies with weather conditions. An uncovered manure pile was estimated to cause no water quality impacts during dry weather. During wet weather, the bacteria and nutrients reaching the stream from an uncovered manure pile was estimated to be 60% of the quantity released. The maximum amount of nitrogen leaching to groundwater was estimated to be 10% of the amount applied to the pile since the previous rain. In addition to implementation costs of BMPs, there are changes in annual revenue and costs associated with the management changes. Partial budget analyses were conducted for the four SCAEs to determine their changes in annual monetary returns to management. Both BMPs resulted in negative changes in annual returns to management for all four enterprises. Title: Implementing best management practices in small commercial and non-commercial animal enterprises Author: Godwin, Derek C. Small commercial and non-commercial animal enterprises (SCAEs) raise a few beef cows, horses, pigs, sheep, poultry, and other animals on a few acres. These enterprises are often located in suburban areas of watersheds and show potential for degrading water quality through to increased bacterial, nitrogen, and phosphorus concentrations. SCAEs implement Best Management Practices (BNIPs) on a voluntary basis to control their water quality impacts. Off-stream watering areas, with animal access to streams, and covered manure storages are two BMPs which were analyzed in this thesis for effectiveness in reducing bacteria, nitrogen, and phosphorus from entering surface and groundwater in four SCAEs. The four cooperating SCAEs were located in the Tualatin River Basin, and the potential water quality improvements from implementing these two practices in all SCAEs in the basin were discussed. The BMP analyses use results from several studies. Two of these studies analyzed off-stream watering areas for reducing time animals spend watering at the stream. This time was measured and used to estimate the manure defecated in the stream. Reducing time animals spend at the stream decreases direct defecations in the stream and reduces water quality impacts of SCAEs. A third study analyzed a pasture pump as a possible off-stream watering device. It was analyzed for its ability to provide water to 27 Holstein dairy heifers without limiting water consumption. Daily water consumption from the pasture pump was not significantly different than daily consumption from an open water trough. A fourth study predicted the rainfall required to produce runoff from pastured areas in the Dairy-McKay Hydrological Unit Area within the Tualatin River Basin. These required rainfall amounts and runoff frequency were predicted for summer and winter soil conditions. The BMPs were analyzed for a variety of wet and dry conditions during the summer and winter. Off-stream watering areas were most effective in reducing water quality impacts of SCAEs for dry conditions during the summer and winter, while the covered manure storages were most effective during winter days of continuous rain. Off-stream watering areas reduced the time animals spent at the stream by 75%. Consequently, defecations at the stream were assumed to be reduced 75% and the SCAEs'water quality impacts decreased. Covered manure storages protect manure piles from rain and surface water runoff and prevent bacteria and nutrients from entering the stream or leaching to groundwater regardless of the weather. However, the amount prevented varies with weather conditions. An uncovered manure pile was estimated to cause no water quality impacts during dry weather. During wet weather, the bacteria and nutrients reaching the stream from an uncovered manure pile was estimated to be 60% of the quantity released. The maximum amount of nitrogen leaching to groundwater was estimated to be 10% of the amount applied to the pile since the previous rain. In addition to implementation costs of BMPs, there are changes in annual revenue and costs associated with the management changes. Partial budget analyses were conducted for the four SCAEs to determine their changes in annual monetary returns to management. Both BMPs resulted in negative changes in annual returns to management for all four enterprises. Close

• 25. [Article] Municipal Water Impacts on Steelhead Trout in the Gales Creek Watershed

  Graduation date: 2016

  Citation × Citation Citation Abstract Copy Title: Municipal Water Impacts on Steelhead Trout in the Gales Creek Watershed Author: Smith, Haley B. Graduation date: 2016 Title: Municipal Water Impacts on Steelhead Trout in the Gales Creek Watershed Author: Smith, Haley B. Graduation date: 2016 Close

• 26. [Article] Data analysis: water quality of Dairy Creek and major tributaries

  Dairy Creek, located in Washington County, Oregon, has a drainage area of approximately 230 square miles, and includes West Fork, East Fork, and McKay Creek drainages. Dairy Creek is a major tributary ...

  Citation × Citation Citation Abstract Copy Title: Data analysis: water quality of Dairy Creek and major tributaries Author: Oregon State University. Water Resources Research Institute, Miner, J. Ronald, Scott, Eric F. Dairy Creek, located in Washington County, Oregon, has a drainage area of approximately 230 square miles, and includes West Fork, East Fork, and McKay Creek drainages. Dairy Creek is a major tributary of the Tualatin River which experiences algal problems during the late summer when stream flows decrease and water temperatures increase. The upper reaches of Dairy Creek are forested land, while the lower reaches are devoted to intensively irrigated agricultural production. It has been proposed that excessive algae blooms are associated with elevated nutrient concentrations during summer low-flow conditions. The objective of this project was to evaluate nutrient loading to the Tualatin River from the Dairy Creek watershed. Water quality parameters were selected to examine relationships between precipitation, flow, solids and nutrient constituents. The following conclusions were reached: 1. Surface runoff and erosion processes did not appear to occur and hence had little impact on water quality during the months of July through October during 1990 and 1991. 2. Groundwater moving to the stream appears to drive flow and have significant influence on water quality during summer low-flow conditions. 3. Nutrient concentrations are greatest during the summer. This may be a consequence of increased solubility and greater contact time between soils and groundwater moving toward the creek. A second alternative is the winter time sediment deposition. 4. Most of the nutrient and solids loading occurs during the winter and early spring at times of highest stream flows. Title: Data analysis: water quality of Dairy Creek and major tributaries Author: Oregon State University. Water Resources Research Institute, Miner, J. Ronald, Scott, Eric F. Dairy Creek, located in Washington County, Oregon, has a drainage area of approximately 230 square miles, and includes West Fork, East Fork, and McKay Creek drainages. Dairy Creek is a major tributary of the Tualatin River which experiences algal problems during the late summer when stream flows decrease and water temperatures increase. The upper reaches of Dairy Creek are forested land, while the lower reaches are devoted to intensively irrigated agricultural production. It has been proposed that excessive algae blooms are associated with elevated nutrient concentrations during summer low-flow conditions. The objective of this project was to evaluate nutrient loading to the Tualatin River from the Dairy Creek watershed. Water quality parameters were selected to examine relationships between precipitation, flow, solids and nutrient constituents. The following conclusions were reached: 1. Surface runoff and erosion processes did not appear to occur and hence had little impact on water quality during the months of July through October during 1990 and 1991. 2. Groundwater moving to the stream appears to drive flow and have significant influence on water quality during summer low-flow conditions. 3. Nutrient concentrations are greatest during the summer. This may be a consequence of increased solubility and greater contact time between soils and groundwater moving toward the creek. A second alternative is the winter time sediment deposition. 4. Most of the nutrient and solids loading occurs during the winter and early spring at times of highest stream flows. Close

• 27. [Article] Water quality modeling of the Tualatin River

  Water quality problems related to excessive algal growth, high nutrient loading, and low flows have been occurring along Oregon's Tualatin River. The Tualatin River is 86 miles long and has a drainage ...

  Citation × Citation Citation Abstract Copy Title: Water quality modeling of the Tualatin River Author: Berger, Christopher J. (Christopher John) Water quality problems related to excessive algal growth, high nutrient loading, and low flows have been occurring along Oregon's Tualatin River. The Tualatin River is 86 miles long and has a drainage basin of 711 square miles. The drainage basin incorporates forest, agricultural, and urban areas. Located in the Portland metropolitan area, these problems have been acerbated by the effects of urban growth. To help analyze pollution control alternatives, a river model study, funded by the Oregon Department of Environmental Quality (DEQ), was undertaken. An in-stream model of hydraulics and water quality was developed. The Corps of Engineer's CE-QUAL-W2 model, a twodimensional, laterally averaged, dynamic model of hydrodynamics and water quality was applied to the Tualatin system. Calibration of the main pool model of the Tualatin River was from field data taken during June through August of 1991. Verification of the model was performed from field data taken during the summer of 1990. After calibration and verification of the model, management alternatives were evaluated in order to achieve DEQ mandated water quality standards. Environmental performance criteria were determined to evaluate differences between model scenarios. Management alternatives focused on the reduction of point and non-point sources of pollution, flow augmentation, and structural changes in the river system, such as removal of the Lake Oswego Diversion Dam. Title: Water quality modeling of the Tualatin River Author: Berger, Christopher J. (Christopher John) Water quality problems related to excessive algal growth, high nutrient loading, and low flows have been occurring along Oregon's Tualatin River. The Tualatin River is 86 miles long and has a drainage basin of 711 square miles. The drainage basin incorporates forest, agricultural, and urban areas. Located in the Portland metropolitan area, these problems have been acerbated by the effects of urban growth. To help analyze pollution control alternatives, a river model study, funded by the Oregon Department of Environmental Quality (DEQ), was undertaken. An in-stream model of hydraulics and water quality was developed. The Corps of Engineer's CE-QUAL-W2 model, a twodimensional, laterally averaged, dynamic model of hydrodynamics and water quality was applied to the Tualatin system. Calibration of the main pool model of the Tualatin River was from field data taken during June through August of 1991. Verification of the model was performed from field data taken during the summer of 1990. After calibration and verification of the model, management alternatives were evaluated in order to achieve DEQ mandated water quality standards. Environmental performance criteria were determined to evaluate differences between model scenarios. Management alternatives focused on the reduction of point and non-point sources of pollution, flow augmentation, and structural changes in the river system, such as removal of the Lake Oswego Diversion Dam. Close

• 28. [Article] Climate Change and Shifts in Water Related Ecosystem Services in the Tualatin and Yamhill River Basins

  Presented at The Oregon Water Conference, May 24-25, 2011, Corvallis, OR.

  Citation × Citation Citation Abstract Copy Title: Climate Change and Shifts in Water Related Ecosystem Services in the Tualatin and Yamhill River Basins Author: Chang, Heejun, Sharma, Manu, Ennaanay, Driss, Anthony, Terrance Year: 2011 Presented at The Oregon Water Conference, May 24-25, 2011, Corvallis, OR. Title: Climate Change and Shifts in Water Related Ecosystem Services in the Tualatin and Yamhill River Basins Author: Chang, Heejun, Sharma, Manu, Ennaanay, Driss, Anthony, Terrance Year: 2011 Presented at The Oregon Water Conference, May 24-25, 2011, Corvallis, OR. Close

• 29. [Article] Calibration and verification of HSPF model for Tualatin River Basin Water Quality

  The Tualatin River Basin is located in the Washington County, Oregon. The river was detected having high chlorophyll a concentration and low dissolved oxygen concentration during summer time, which violated ...

  Citation × Citation Citation Abstract Copy Title: Calibration and verification of HSPF model for Tualatin River Basin Water Quality Author: Tang, Fei The Tualatin River Basin is located in the Washington County, Oregon. The river was detected having high chlorophyll a concentration and low dissolved oxygen concentration during summer time, which violated DEQ water quality standards. A mathematical model (HSPF) was used to simulate physical, chemical and biological processes in the basin and to evaluate the effect of the 'best management practice' (BMP) strategy on improving water quality of the basin. Calibration of the model was focused on water temperature, total suspended solids, dissolved oxygen, dissolved ammonia, dissolved nitrate, dissolved phosphate, and chlorophyll a. Comparison against observed data (1990) showed that the model predictions were accurate for most of the constituents. After verification, the model was used to evaluate the strategy of the Best Management Practice (BMP) on the agricultural land at Gales Creek basin, a major sub-basin of the study area. The results showed that the effect of BMP on nutrients loading from land segment is not significant at Gales Creek. Title: Calibration and verification of HSPF model for Tualatin River Basin Water Quality Author: Tang, Fei The Tualatin River Basin is located in the Washington County, Oregon. The river was detected having high chlorophyll a concentration and low dissolved oxygen concentration during summer time, which violated DEQ water quality standards. A mathematical model (HSPF) was used to simulate physical, chemical and biological processes in the basin and to evaluate the effect of the 'best management practice' (BMP) strategy on improving water quality of the basin. Calibration of the model was focused on water temperature, total suspended solids, dissolved oxygen, dissolved ammonia, dissolved nitrate, dissolved phosphate, and chlorophyll a. Comparison against observed data (1990) showed that the model predictions were accurate for most of the constituents. After verification, the model was used to evaluate the strategy of the Best Management Practice (BMP) on the agricultural land at Gales Creek basin, a major sub-basin of the study area. The results showed that the effect of BMP on nutrients loading from land segment is not significant at Gales Creek. Close

• 30. [Article] The farm wood lot in the hardwood district of Minnesota and in the Tualatin Valley of Oregon

  Citation × Citation Citation Abstract Copy Title: The farm wood lot in the hardwood district of Minnesota and in the Tualatin Valley of Oregon Author: Johnson, Earl L. Title: The farm wood lot in the hardwood district of Minnesota and in the Tualatin Valley of Oregon Author: Johnson, Earl L. Close

• 31. [Article] The Shade Credit Incentive Landscapes of the McKenzie/Willamette Confluence

  Increasing population and land use decisions have had a negative effect on the aquatic ecosystems in the Willamette River Basin. One result is elevated temperatures in many of the Basin’s streams, which ...

  Citation × Citation Citation Abstract Copy Title: The Shade Credit Incentive Landscapes of the McKenzie/Willamette Confluence Author: Shaub, Nathan C. Increasing population and land use decisions have had a negative effect on the aquatic ecosystems in the Willamette River Basin. One result is elevated temperatures in many of the Basin’s streams, which adversely affect the fish that live in these streams. There are several regulatory mechanisms in place to improve water quality; however, recent attention has been focused on market-based pollution credit trading systems as an alternative approach. Clean Water Services, the public water utility in the Tualatin Watershed near Portland recently began the first program in the country to trade temperature pollution credits for creating shade. This project explores the distribution of high and low shade credit potential in the landscape around the confluence of the Willamette and McKenzie Rivers using the peer reviewed WET_Temp stream temperature model. The intent of this project is to provide a tool for land use planners to explore the geographic characteristics of high incentive areas (high shade potential) and target these areas with shade credit programs. Also, this project explores the effects of management decisions on the changing shade credit incentive landscape. Title: The Shade Credit Incentive Landscapes of the McKenzie/Willamette Confluence Author: Shaub, Nathan C. Increasing population and land use decisions have had a negative effect on the aquatic ecosystems in the Willamette River Basin. One result is elevated temperatures in many of the Basin’s streams, which adversely affect the fish that live in these streams. There are several regulatory mechanisms in place to improve water quality; however, recent attention has been focused on market-based pollution credit trading systems as an alternative approach. Clean Water Services, the public water utility in the Tualatin Watershed near Portland recently began the first program in the country to trade temperature pollution credits for creating shade. This project explores the distribution of high and low shade credit potential in the landscape around the confluence of the Willamette and McKenzie Rivers using the peer reviewed WET_Temp stream temperature model. The intent of this project is to provide a tool for land use planners to explore the geographic characteristics of high incentive areas (high shade potential) and target these areas with shade credit programs. Also, this project explores the effects of management decisions on the changing shade credit incentive landscape. Close

• 32. [Article] Copper Speciation in Wastewater-Impacted Surface Waters

  This study investigates the relationship between total and ionic copper in samples taken from the Tualatin River and wastewater treatment facilities (WWTFs) that discharge into the Tualatin River. Copper ...

  Citation × Citation Citation Abstract Copy Title: Copper Speciation in Wastewater-Impacted Surface Waters Author: Mosbrucker, Ariel M. This study investigates the relationship between total and ionic copper in samples taken from the Tualatin River and wastewater treatment facilities (WWTFs) that discharge into the Tualatin River. Copper speciation was analyzed by determining conditional stability constants and densities of copper binding ligands on the dissolved organic matter (DOM) in each sample using a two-ligand model. Differences in copper binding between wastewater and river water were identified, changes in copper binding following the mixing of WWTF effluent and receiving waters were observed, and the ability of the Biotic Ligand Model (BLM) to predict copper speciation in each sample was determined. WWTF effluent samples were found to bind copper more strongly than river water samples through a larger conditional stability constant for the strong binding site. At low dilution ratios, copper binding characteristics in waters downstream of WWTF outfalls deviated from those of upstream waters by approaching the WWTF effluent characteristics for copper binding. The BLM adequately predicted copper speciation in waters without a high percentage of WWTF effluent, but overpredicted ionic copper concentrations in effluent and downstream waters during low-flow by as much as 2-3 orders of magnitude. The differences observed highlight the need to account for WWTF DOM in the BLM framework. Title: Copper Speciation in Wastewater-Impacted Surface Waters Author: Mosbrucker, Ariel M. This study investigates the relationship between total and ionic copper in samples taken from the Tualatin River and wastewater treatment facilities (WWTFs) that discharge into the Tualatin River. Copper speciation was analyzed by determining conditional stability constants and densities of copper binding ligands on the dissolved organic matter (DOM) in each sample using a two-ligand model. Differences in copper binding between wastewater and river water were identified, changes in copper binding following the mixing of WWTF effluent and receiving waters were observed, and the ability of the Biotic Ligand Model (BLM) to predict copper speciation in each sample was determined. WWTF effluent samples were found to bind copper more strongly than river water samples through a larger conditional stability constant for the strong binding site. At low dilution ratios, copper binding characteristics in waters downstream of WWTF outfalls deviated from those of upstream waters by approaching the WWTF effluent characteristics for copper binding. The BLM adequately predicted copper speciation in waters without a high percentage of WWTF effluent, but overpredicted ionic copper concentrations in effluent and downstream waters during low-flow by as much as 2-3 orders of magnitude. The differences observed highlight the need to account for WWTF DOM in the BLM framework. Close

• 33. [Article] Biological Opinion: West Fork Dairy Creek (Soupy Mud) Erosion Repair, Nehalem Highway, Washington County, Oregon

  On September 22, 2000, the National Marine Fisheries Service (NMFS) received a request from the U.S. Army Corps of Engineers (COE) for Endangered Species Act (ESA) section 7 formal consultation for the ...

  Citation × Citation Citation Abstract Copy Title: Biological Opinion: West Fork Dairy Creek (Soupy Mud) Erosion Repair, Nehalem Highway, Washington County, Oregon On September 22, 2000, the National Marine Fisheries Service (NMFS) received a request from the U.S. Army Corps of Engineers (COE) for Endangered Species Act (ESA) section 7 formal consultation for the West Fork Dairy Creek (Soupy Mud) erosion repair project (Corps No. 2000- 862). The project will repair the erosion along the Nehalem Highway (Highway 47) at milepoint 74.8, located about 1.5 miles north of the Sunset Highway in Washington County, Oregon. The West Fork Dairy Creek is a tributary of the Tualatin River. The dominant land use upstream of the project area is forestry. The watershed has been logged intensively in the past 10 years. This biological opinion (Opinion) is based on the information presented in the biological assessment (BA) and the result of the consultation process. The consultation process has involved a site visit, and correspondence and communications to obtain additional information and clarify the BA. Title: Biological Opinion: West Fork Dairy Creek (Soupy Mud) Erosion Repair, Nehalem Highway, Washington County, Oregon On September 22, 2000, the National Marine Fisheries Service (NMFS) received a request from the U.S. Army Corps of Engineers (COE) for Endangered Species Act (ESA) section 7 formal consultation for the West Fork Dairy Creek (Soupy Mud) erosion repair project (Corps No. 2000- 862). The project will repair the erosion along the Nehalem Highway (Highway 47) at milepoint 74.8, located about 1.5 miles north of the Sunset Highway in Washington County, Oregon. The West Fork Dairy Creek is a tributary of the Tualatin River. The dominant land use upstream of the project area is forestry. The watershed has been logged intensively in the past 10 years. This biological opinion (Opinion) is based on the information presented in the biological assessment (BA) and the result of the consultation process. The consultation process has involved a site visit, and correspondence and communications to obtain additional information and clarify the BA. Close

• 34. [Article] Clackamas River watershed atlas

  Metro received grant funding from the U.S. Environmental Protection Agency in 1995 to gather digital, or computerized, geographic data for the Clackamas River watershed. This atlas was produced as one ...

  Citation × Citation Citation Abstract Copy Title: Clackamas River watershed atlas Author: Metro Regional Services Metro received grant funding from the U.S. Environmental Protection Agency in 1995 to gather digital, or computerized, geographic data for the Clackamas River watershed. This atlas was produced as one way to share the information collected with resource managers, policy makers, and people living in and interested in the Clackamas River watershed. The project study area is the entire land area draining into the Clackamas River in northwestern Oregon, referred to as the Clackamas River watershed. The watershed is part of the lower portion of the Willamette River basin. Title: Clackamas River watershed atlas Author: Metro Regional Services Metro received grant funding from the U.S. Environmental Protection Agency in 1995 to gather digital, or computerized, geographic data for the Clackamas River watershed. This atlas was produced as one way to share the information collected with resource managers, policy makers, and people living in and interested in the Clackamas River watershed. The project study area is the entire land area draining into the Clackamas River in northwestern Oregon, referred to as the Clackamas River watershed. The watershed is part of the lower portion of the Willamette River basin. Close

• 35. [Article] Incorporation of salmon derived nutrients into Oregon coastal streams and the role of physical habitat

  Citation × Citation Citation Abstract Copy Title: Incorporation of salmon derived nutrients into Oregon coastal streams and the role of physical habitat Author: Shaff, Courtney D. Title: Incorporation of salmon derived nutrients into Oregon coastal streams and the role of physical habitat Author: Shaff, Courtney D. Close

• 36. [Article] Jordan/Alder Watershed Assessment

  The Jordan/Alder Watershed is a 2,459-acre watershed located in southwest Oregon immediately west of Canyonville in Douglas County. This watershed--a portion of the O'Shea Creek HUC6, or sixth-field watershed--lies ...

  Citation × Citation Citation Abstract Copy Title: Jordan/Alder Watershed Assessment Author: Barnes and Associates Inc. The Jordan/Alder Watershed is a 2,459-acre watershed located in southwest Oregon immediately west of Canyonville in Douglas County. This watershed--a portion of the O'Shea Creek HUC6, or sixth-field watershed--lies within the bounds of the South Umpqua River HUC5, or fifth-field watershed. Jordan Creek is a tributary to the South Umpqua River immediately downstream of the City of Canyonville, while Alder Creek is a tributary of Jordan Creek. The South Umpqua River bounds the watershed on the north. Title: Jordan/Alder Watershed Assessment Author: Barnes and Associates Inc. The Jordan/Alder Watershed is a 2,459-acre watershed located in southwest Oregon immediately west of Canyonville in Douglas County. This watershed--a portion of the O'Shea Creek HUC6, or sixth-field watershed--lies within the bounds of the South Umpqua River HUC5, or fifth-field watershed. Jordan Creek is a tributary to the South Umpqua River immediately downstream of the City of Canyonville, while Alder Creek is a tributary of Jordan Creek. The South Umpqua River bounds the watershed on the north. Close

• 37. [Article] Clackamas River watershed atlas

  For full resolution tiffs of maps contact scholarsarchive@OSU.

  Citation × Citation Citation Abstract Copy Title: Clackamas River watershed atlas Author: Metropolitan Service District (Or.) For full resolution tiffs of maps contact scholarsarchive@OSU. Title: Clackamas River watershed atlas Author: Metropolitan Service District (Or.) For full resolution tiffs of maps contact scholarsarchive@OSU. Close

• 38. [Article] Marys River Watershed restoration planning by using a multiple-objective decision-support tool, RESTORE

  Citation × Citation Citation Abstract Copy Title: Marys River Watershed restoration planning by using a multiple-objective decision-support tool, RESTORE Author: Nishioka, Kimitake Title: Marys River Watershed restoration planning by using a multiple-objective decision-support tool, RESTORE Author: Nishioka, Kimitake Close

• 39. [Article] USDA report on water and related land resources, Middle Willamette River Basin, Oregon

  Citation × Citation Citation Abstract Copy Title: USDA report on water and related land resources, Middle Willamette River Basin, Oregon Author: USDA Oregon River Basin Survey Party, Oregon. State Water Resources Board, United States. Dept. of Agriculture. Economic Research Service, United States. Soil Conservation Service, USDA Field Advisory Committee, United States. Forest Service Title: USDA report on water and related land resources, Middle Willamette River Basin, Oregon Author: USDA Oregon River Basin Survey Party, Oregon. State Water Resources Board, United States. Dept. of Agriculture. Economic Research Service, United States. Soil Conservation Service, USDA Field Advisory Committee, United States. Forest Service Close

• 40. [Article] Social Learning and Adaptive Capacity in Collaborative Watershed Partnerships

  This dissertation examines learning driven adaptations in salmon recovery efforts and water resources management in Oregon. The case study utilizes a framework highlighting the connections between human ...

  Citation × Citation Citation Abstract Copy Title: Social Learning and Adaptive Capacity in Collaborative Watershed Partnerships Author: Calvert, Daniel T. This dissertation examines learning driven adaptations in salmon recovery efforts and water resources management in Oregon. The case study utilizes a framework highlighting the connections between human and natural systems. Semi-structured interviews are used to analyze interactions between rural riparian landowners and watershed council staffs living and working in Oregon’s Upper Willamette River basin. Findings indicate that 1) different types of learning interventions and peer-to-peer interactions are key drivers of learning, 2) natural resource management and learning interventions should be tailored towards social-ecological systems, and 3) collaborative watershed partnerships can integrate different knowledge types and increase adaptive capacity. Title: Social Learning and Adaptive Capacity in Collaborative Watershed Partnerships Author: Calvert, Daniel T. This dissertation examines learning driven adaptations in salmon recovery efforts and water resources management in Oregon. The case study utilizes a framework highlighting the connections between human and natural systems. Semi-structured interviews are used to analyze interactions between rural riparian landowners and watershed council staffs living and working in Oregon’s Upper Willamette River basin. Findings indicate that 1) different types of learning interventions and peer-to-peer interactions are key drivers of learning, 2) natural resource management and learning interventions should be tailored towards social-ecological systems, and 3) collaborative watershed partnerships can integrate different knowledge types and increase adaptive capacity. Close

• 41. [Article] Trask watershed action plan

  The purpose of this document is to help guide the Council toward its goals of improving, maintaining and protecting watershed health, and fostering stewardship and understanding of the watershed.

  Citation × Citation Citation Abstract Copy Title: Trask watershed action plan Author: Tillamook Bay Watershed Council The purpose of this document is to help guide the Council toward its goals of improving, maintaining and protecting watershed health, and fostering stewardship and understanding of the watershed. Title: Trask watershed action plan Author: Tillamook Bay Watershed Council The purpose of this document is to help guide the Council toward its goals of improving, maintaining and protecting watershed health, and fostering stewardship and understanding of the watershed. Close

• 42. [Article] A physical inventory of streams in the Upper Willamette Watershed above the confluence of middle and coast forks of Willamette River : 1964

  Dimensions of paper map: 37" x 37.5".

  Citation × Citation Citation Abstract Copy Title: A physical inventory of streams in the Upper Willamette Watershed above the confluence of middle and coast forks of Willamette River : 1964 Author: Oregon. State Game Commission. Basin Investigations Section, Thompson, Kenneth E. Dimensions of paper map: 37" x 37.5". Title: A physical inventory of streams in the Upper Willamette Watershed above the confluence of middle and coast forks of Willamette River : 1964 Author: Oregon. State Game Commission. Basin Investigations Section, Thompson, Kenneth E. Dimensions of paper map: 37" x 37.5". Close

• 43. [Article] South Umpqua River Watershed assessment and action plan

  The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information ...

  Citation × Citation Citation Abstract Copy Title: South Umpqua River Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), the Myrtle Creek Watershed Analysis (Draft) (USDI Bureau of Land Management, 2002) and the Middle South Umpqua Watershed Analysis (USDI Bureau of Land Management, 1999). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Title: South Umpqua River Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), the Myrtle Creek Watershed Analysis (Draft) (USDI Bureau of Land Management, 2002) and the Middle South Umpqua Watershed Analysis (USDI Bureau of Land Management, 1999). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Close

• 44. [Article] Issues surrounding the Biota of the Tualatin River Basin

  Citation × Citation Citation Abstract Copy Title: Issues surrounding the Biota of the Tualatin River Basin Author: Oregon State University. Water Resources Research Institute, Gregory, Stanley V., Li, Judith L. Title: Issues surrounding the Biota of the Tualatin River Basin Author: Oregon State University. Water Resources Research Institute, Gregory, Stanley V., Li, Judith L. Close

• 45. [Article] Streamside forests, channel constraint, large woody debris characteristics, and pool morphology in low order streams, Blue Mountains, Oregon

  Citation × Citation Citation Abstract Copy Title: Streamside forests, channel constraint, large woody debris characteristics, and pool morphology in low order streams, Blue Mountains, Oregon Author: Cordova, Jerry J. Title: Streamside forests, channel constraint, large woody debris characteristics, and pool morphology in low order streams, Blue Mountains, Oregon Author: Cordova, Jerry J. Close

• 46. [Article] South Fork Alsea watershed analysis

  Citation × Citation Citation Abstract Copy Title: South Fork Alsea watershed analysis Title: South Fork Alsea watershed analysis Close

• 47. [Article] Necanicum River watershed assessment

  In this watershed assessment, the authors of the report summarized current conditions and data gaps within the Necanicum River watershed to help to identify how current and past resource management is ...

  Citation × Citation Citation Abstract Copy Title: Necanicum River watershed assessment Author: E&S Environmental Chemistry, Inc., Sullivan, Timothy J., Snyder, Kai U., Raymond, Richard B., Gilbert, Erin H., Moore, Deian L. In this watershed assessment, the authors of the report summarized current conditions and data gaps within the Necanicum River watershed to help to identify how current and past resource management is impacting aquatic resources. Title: Necanicum River watershed assessment Author: E&S Environmental Chemistry, Inc., Sullivan, Timothy J., Snyder, Kai U., Raymond, Richard B., Gilbert, Erin H., Moore, Deian L. In this watershed assessment, the authors of the report summarized current conditions and data gaps within the Necanicum River watershed to help to identify how current and past resource management is impacting aquatic resources. Close

• 48. [Article] How forest conditions affected the 1948 Columbia flood

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: How forest conditions affected the 1948 Columbia flood Author: United States. Forest Service Gerald W. Williams Collection Title: How forest conditions affected the 1948 Columbia flood Author: United States. Forest Service Gerald W. Williams Collection Close

• 49. [Article] A demonstration of lodgepole pine management to prevent mountain pine beetle outbreaks, Yaak and Thompson River drainages : progress report

  Citation × Citation Citation Abstract Copy Title: A demonstration of lodgepole pine management to prevent mountain pine beetle outbreaks, Yaak and Thompson River drainages : progress report Author: United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D. Title: A demonstration of lodgepole pine management to prevent mountain pine beetle outbreaks, Yaak and Thompson River drainages : progress report Author: United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D. Close

• 50. [Article] Report on reconnaissance, Clearwater River and tributaries, Idaho : 22 September to 8 October 1944

  Citation × Citation Citation Abstract Copy Title: Report on reconnaissance, Clearwater River and tributaries, Idaho : 22 September to 8 October 1944 Author: MacDuffee, K. M. Title: Report on reconnaissance, Clearwater River and tributaries, Idaho : 22 September to 8 October 1944 Author: MacDuffee, K. M. Close