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• 111. [Article] Salem Notice of Adopted Amendment (2010-02-10)

  7 pp. Adopted 2010-02-10. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Salem Notice of Adopted Amendment (2010-02-10) Author: Salem Year: 2014, 2010 7 pp. Adopted 2010-02-10. Department of Land Conservation and Development Notice of Adopted Amendment Title: Salem Notice of Adopted Amendment (2010-02-10) Author: Salem Year: 2014, 2010 7 pp. Adopted 2010-02-10. Department of Land Conservation and Development Notice of Adopted Amendment Close

• 112. [Article] Imbler Notice of Adopted Amendment (2006-07-07)

  10 pp. Adopted 2006-07-07. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Imbler Notice of Adopted Amendment (2006-07-07) Author: Imbler Year: 2014, 2006 10 pp. Adopted 2006-07-07. Department of Land Conservation and Development Notice of Adopted Amendment Title: Imbler Notice of Adopted Amendment (2006-07-07) Author: Imbler Year: 2014, 2006 10 pp. Adopted 2006-07-07. Department of Land Conservation and Development Notice of Adopted Amendment Close

• 113. [Article] Local Growth and Land Use Intensification: A Sociological Study of Urbanization and Environmental Change

  This dissertation takes a sociological look at the relationship between urbanization and environmental change. While sociological studies on urbanization have long addressed the social dimensions of the ...

  Citation × Citation Citation Abstract Copy Title: Local Growth and Land Use Intensification: A Sociological Study of Urbanization and Environmental Change Author: Clement, Matthew Year: 2015 This dissertation takes a sociological look at the relationship between urbanization and environmental change. While sociological studies on urbanization have long addressed the social dimensions of the built environment, the natural environment has not been treated as a primary concept in urban sociology. Based on an analysis of local land use change across the United States at the beginning of the 21st century, this dissertation brings the built and natural environments together, recognizing both as important dimensions of urbanization. The expansion of the built environment, through deforestation and the covering up of fertile agricultural land, represents a modern form of land use change with direct and indirect impacts on the natural environment, the most severe effects of which are seen in biodiversity loss, disruption of the nitrogen cycle, and climate change. Drawing on literatures and theories in environmental, rural, and urban sociology as well as demography and human ecology, the bulk of the dissertation involves empirical analyses of overall changes in forest cover as well as the loss of forest cover and agricultural land to the built environment (i.e., the impervious structures and surfaces that cover the land), a process I refer to as land use intensification. My dissertation project uses quantitative methods to examine the demographic, economic, and social forces behind this process in contemporary America. Hypotheses are derived from the various literatures mentioned above; to test these hypotheses, I integrate county-level data from US governmental sources with satellite imagery on land cover change from the National Land Cover Database (NLCD). For the years 2001-2006, I use the NLCD data to quantify three dependent variables at the county-level: overall change in the area of forest cover as well as the area of forest cover and agricultural land lost to the built environment. Results from regression analyses demonstrate that urbanization is a multidimensional process that differentially transforms the American landscape. With a focus on land use intensification, this study advances a sociological framework to address connections between urbanization and changes in both the built and natural environments. Title: Local Growth and Land Use Intensification: A Sociological Study of Urbanization and Environmental Change Author: Clement, Matthew Year: 2015 This dissertation takes a sociological look at the relationship between urbanization and environmental change. While sociological studies on urbanization have long addressed the social dimensions of the built environment, the natural environment has not been treated as a primary concept in urban sociology. Based on an analysis of local land use change across the United States at the beginning of the 21st century, this dissertation brings the built and natural environments together, recognizing both as important dimensions of urbanization. The expansion of the built environment, through deforestation and the covering up of fertile agricultural land, represents a modern form of land use change with direct and indirect impacts on the natural environment, the most severe effects of which are seen in biodiversity loss, disruption of the nitrogen cycle, and climate change. Drawing on literatures and theories in environmental, rural, and urban sociology as well as demography and human ecology, the bulk of the dissertation involves empirical analyses of overall changes in forest cover as well as the loss of forest cover and agricultural land to the built environment (i.e., the impervious structures and surfaces that cover the land), a process I refer to as land use intensification. My dissertation project uses quantitative methods to examine the demographic, economic, and social forces behind this process in contemporary America. Hypotheses are derived from the various literatures mentioned above; to test these hypotheses, I integrate county-level data from US governmental sources with satellite imagery on land cover change from the National Land Cover Database (NLCD). For the years 2001-2006, I use the NLCD data to quantify three dependent variables at the county-level: overall change in the area of forest cover as well as the area of forest cover and agricultural land lost to the built environment. Results from regression analyses demonstrate that urbanization is a multidimensional process that differentially transforms the American landscape. With a focus on land use intensification, this study advances a sociological framework to address connections between urbanization and changes in both the built and natural environments. Close

• 114. [Article] The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments

  Hydrologic processes within mineral flat wetlands, along with their connections to groundwater and downstream surface water in lowland agricultural catchments are poorly understood, particularly under ...

  Citation × Citation Citation Abstract Copy Title: The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments Author: Marshall, Sarah M. (Sarah Marie) Hydrologic processes within mineral flat wetlands, along with their connections to groundwater and downstream surface water in lowland agricultural catchments are poorly understood, particularly under different land uses. In the three field studies included in this thesis, we examined infiltration, wetland hydroperiod, groundwater recharge dynamics, surface runoff generation, and water quality in mineral flat wetlands using a combination of soil and hydrometric measurements, stable isotope tracers, and water chemistry analysis. Our overarching objectives were to examine, for mineral flat wetlands under native prairie, farmed grassland, and restored prairie land cover: 1) how different land management influences infiltration and wetland hydroperiod at the plot scale, 2) the effects of land use on seasonal groundwater-surface water dynamics at the field scale, and 3) seasonal variation in runoff sources and nutrient transport from native prairie and farmed wetlands at the small catchment scale. At the plot scale, our results suggest that edaphic factors, particularly those related to soil structure, are strongly associated with wetland infiltration and overall hydroperiod across least-altered prairie, farmed, and restored prairie mineral flat wetlands. The hydroperiod metrics we examined were generally more sensitive to level of site disturbance than land use alone. At the field scale, our results indicate that, in spite of land use differences and slight variations in soil stratigraphy, many similarities exist in overall wetland hydroperiod, water sources and evaporation rates for mineral flat wetlands in the Willamette Valley lowlands. Isotopic evidence suggests that the greatest degree of groundwater-surface water mixing occurs in the upper 0.5 m of the saturated soil profile across sites under all land uses. Finally, at the small catchment scale, farmed wetland runoff was isotopically similar to field surface water for most of the wet season, indicating that saturation excess was an important runoff generation process. Prairie wetland runoff was isotopically similar to upstream water throughout the winter, and briefly similar to shallow groundwater and surface water within the wetland in mid-spring. Throughout the wet season, elevated nitrate, sulfate, and chloride concentrations were observed in groundwater and surface water at the farm site, and deeper groundwater at the prairie site. Upstream-downstream runoff chemistry remained similar throughout the wet season at the prairie site. Farm site runoff chemistry reflected the dominant water source within the farm field throughout the wet season. Our findings suggest that, while surface water pathways dominate runoff from wetland flats under farm land use, large wetland flat fields have a high potential to absorb, store, and process nutrients and agrochemicals from on-site and nearby off-site chemical inputs. Mineral flats that maintain wetland hydrology in spite of farm use represent a unique balance between agricultural production and preservation of some of the water storage and delay, and water quality-related ecosystem services once provided at a much larger scale in the Willamette Valley lowlands. We anticipate that results of this work will lead to better understanding of key site-scale edaphic and hydrologic factors to consider when prioritizing and managing sites for restoration, and how site disturbance under a variety of land uses may impact different hydrologic processes and components of the wetland hydroperiod. Additionally, our results provide a better understanding of how land use affects seasonal runoff generation processes in mineral flat wetlands, and the water quality implications of modifying groundwater and surface water connectivity between mineral flats and surrounding surface drainage networks. Title: The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments Author: Marshall, Sarah M. (Sarah Marie) Hydrologic processes within mineral flat wetlands, along with their connections to groundwater and downstream surface water in lowland agricultural catchments are poorly understood, particularly under different land uses. In the three field studies included in this thesis, we examined infiltration, wetland hydroperiod, groundwater recharge dynamics, surface runoff generation, and water quality in mineral flat wetlands using a combination of soil and hydrometric measurements, stable isotope tracers, and water chemistry analysis. Our overarching objectives were to examine, for mineral flat wetlands under native prairie, farmed grassland, and restored prairie land cover: 1) how different land management influences infiltration and wetland hydroperiod at the plot scale, 2) the effects of land use on seasonal groundwater-surface water dynamics at the field scale, and 3) seasonal variation in runoff sources and nutrient transport from native prairie and farmed wetlands at the small catchment scale. At the plot scale, our results suggest that edaphic factors, particularly those related to soil structure, are strongly associated with wetland infiltration and overall hydroperiod across least-altered prairie, farmed, and restored prairie mineral flat wetlands. The hydroperiod metrics we examined were generally more sensitive to level of site disturbance than land use alone. At the field scale, our results indicate that, in spite of land use differences and slight variations in soil stratigraphy, many similarities exist in overall wetland hydroperiod, water sources and evaporation rates for mineral flat wetlands in the Willamette Valley lowlands. Isotopic evidence suggests that the greatest degree of groundwater-surface water mixing occurs in the upper 0.5 m of the saturated soil profile across sites under all land uses. Finally, at the small catchment scale, farmed wetland runoff was isotopically similar to field surface water for most of the wet season, indicating that saturation excess was an important runoff generation process. Prairie wetland runoff was isotopically similar to upstream water throughout the winter, and briefly similar to shallow groundwater and surface water within the wetland in mid-spring. Throughout the wet season, elevated nitrate, sulfate, and chloride concentrations were observed in groundwater and surface water at the farm site, and deeper groundwater at the prairie site. Upstream-downstream runoff chemistry remained similar throughout the wet season at the prairie site. Farm site runoff chemistry reflected the dominant water source within the farm field throughout the wet season. Our findings suggest that, while surface water pathways dominate runoff from wetland flats under farm land use, large wetland flat fields have a high potential to absorb, store, and process nutrients and agrochemicals from on-site and nearby off-site chemical inputs. Mineral flats that maintain wetland hydrology in spite of farm use represent a unique balance between agricultural production and preservation of some of the water storage and delay, and water quality-related ecosystem services once provided at a much larger scale in the Willamette Valley lowlands. We anticipate that results of this work will lead to better understanding of key site-scale edaphic and hydrologic factors to consider when prioritizing and managing sites for restoration, and how site disturbance under a variety of land uses may impact different hydrologic processes and components of the wetland hydroperiod. Additionally, our results provide a better understanding of how land use affects seasonal runoff generation processes in mineral flat wetlands, and the water quality implications of modifying groundwater and surface water connectivity between mineral flats and surrounding surface drainage networks. Close

• 115. [Article] Douglas County Notice of Adopted Amendment (2006-09-26)

  8 pp. Adopted 2006-09-26. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Douglas County Notice of Adopted Amendment (2006-09-26) Author: Douglas County Year: 2014, 2006 8 pp. Adopted 2006-09-26. Department of Land Conservation and Development Notice of Adopted Amendment Title: Douglas County Notice of Adopted Amendment (2006-09-26) Author: Douglas County Year: 2014, 2006 8 pp. Adopted 2006-09-26. Department of Land Conservation and Development Notice of Adopted Amendment Close

• 116. [Article] Douglas County Notice of Adopted Amendment (2006-09-26)

  7 pp. Adopted 2006-09-26. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Douglas County Notice of Adopted Amendment (2006-09-26) Author: Douglas County Year: 2014, 2006 7 pp. Adopted 2006-09-26. Department of Land Conservation and Development Notice of Adopted Amendment Title: Douglas County Notice of Adopted Amendment (2006-09-26) Author: Douglas County Year: 2014, 2006 7 pp. Adopted 2006-09-26. Department of Land Conservation and Development Notice of Adopted Amendment Close

• 117. [Article] Washington County Notice of Adopted Amendment (2009-10-30)

  183 pp. Adopted 2009-10-30. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Washington County Notice of Adopted Amendment (2009-10-30) Author: Washington County Year: 2014, 2009 183 pp. Adopted 2009-10-30. Department of Land Conservation and Development Notice of Adopted Amendment Title: Washington County Notice of Adopted Amendment (2009-10-30) Author: Washington County Year: 2014, 2009 183 pp. Adopted 2009-10-30. Department of Land Conservation and Development Notice of Adopted Amendment Close

• 118. [Article] Multnomah County Notice of Adopted Amendment (2012-05-23)

  44 pp. Adopted 2012-05-23. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Multnomah County Notice of Adopted Amendment (2012-05-23) Author: Multnomah County Year: 2014, 2012 44 pp. Adopted 2012-05-23. Department of Land Conservation and Development Notice of Adopted Amendment Title: Multnomah County Notice of Adopted Amendment (2012-05-23) Author: Multnomah County Year: 2014, 2012 44 pp. Adopted 2012-05-23. Department of Land Conservation and Development Notice of Adopted Amendment Close

• 119. [Article] Polk County Notice of Adopted Amendment (2012-02-17)

  19 pp. Adopted 2012-02-17. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Polk County Notice of Adopted Amendment (2012-02-17) Author: Polk County Year: 2014, 2012 19 pp. Adopted 2012-02-17. Department of Land Conservation and Development Notice of Adopted Amendment Title: Polk County Notice of Adopted Amendment (2012-02-17) Author: Polk County Year: 2014, 2012 19 pp. Adopted 2012-02-17. Department of Land Conservation and Development Notice of Adopted Amendment Close

• 120. [Article] Polk County Notice of Adopted Amendment (2012-01-03)

  182 pp. Adopted 2012-01-03. Department of Land Conservation and Development Notice of Adopted Amendment

  Citation × Citation Citation Abstract Copy Title: Polk County Notice of Adopted Amendment (2012-01-03) Author: Polk County Year: 2014, 2012 182 pp. Adopted 2012-01-03. Department of Land Conservation and Development Notice of Adopted Amendment Title: Polk County Notice of Adopted Amendment (2012-01-03) Author: Polk County Year: 2014, 2012 182 pp. Adopted 2012-01-03. Department of Land Conservation and Development Notice of Adopted Amendment Close