Urban and rural-residential land uses : their role in watershed health and the rehabilitation of Oregon's wild salmonids Public Deposited


This report was prepared by the Independent Multidisciplinary Science Team of the Oregon Plan for Salmon and Watersheds.


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Abstract or Summary
  • Urban areas currently cover a small fraction of Oregon’s landscape but will expand to accommodate an increasingly large proportion of the state’s growing population and economic activity. Residential developments on rural lands now cover more than twice the area occupied by Oregon’s urban developments and are growing rapidly. Oregon urban and rural-residential developments are frequently located along streams, rivers, estuaries, and coasts. Associated landscape alterations in these areas can impair aquatic ecosystems in a variety of ways. In the Pacific Northwest, there is a growing understanding that aquatic habitat affected by development is important for salmonid populations. This technical report by the Independent Multidisciplinary Science Team (IMST) is a comprehensive review of how human activities in urban and rural-residential areas alter watershed functions, aquatic ecosystems, and the potential implications for salmonid recovery in Oregon. The report focuses on the effects of urban and rural-residential development on Oregon’s watersheds and native wild salmonids; actions that can be used to avoid or mitigate undesirable changes to aquatic ecosystems near developed areas; actions that could facilitate the recovery of salmonid populations in areas affected by development; and the effectiveness of salmonid habitat rehabilitation actions within established urban and rural residential areas.
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  • Independent Multidisciplinary Science Team. 2010. Urban and Rural-residential Land Uses: Their Roles in Watershed Health and the Recovery of Oregon's Wild Salmonids. Technical Report 2010-1. Oregon Plan for Salmon and Watersheds. Oregon Watershed Enhancement Board. Salem, Oregon.
Table of Contents
  • Executive Summary Preface: IMST Perspective and Approach List of Acronyms and Abbreviations Introduction and Background Information Section 1.0: Scope of this Report Section 1.1: A Landscape Approach to Science Questions Section 1.2: Terminology Used in this Report Section 1.3: Policy Context Section 1.4: Oregon’s Human Population Growth Trends Section 1.5: A Landscape Perspective on Rivers in Oregon’s Urban and Rural-residential Areas Science Question 1: How does urbanization alter aquatic ecosystems and what are the implications for salmonid rehabilitation? Section 2.0: Stormwater Section 3.0: Wastewater Sections 4 to 8: Aquatic Ecosystem Processes Altered by Urban and Rural-residential Development Section 4.0: Hydrology Section 5.0: Riparian and Aquatic Physical Habitat Section 6.0: Fish Passage through Urban and Rural-residential Areas Section 7.0: Water Quality Section 8.0: Biological Responses of Aquatic Ecosystems to Urban and Rural-residential Development Science Question 2 – How might Oregon accomplish the mission of the Oregon Plan in the face of an increasingly urbanized landscape? Section 9.0: Potential Contributions to the Oregon Plan Section 9.1: Futures Analysis as a Planning Tool Section 9.2: What actions can be taken to protect salmonids in the face of a developing landscape? Section 9.3: Offsetting Impacts of New Development Section 9.4: Determining the Effectiveness of Actions Taken to Minimize or Offset the Effects of Development on Aquatic Ecosystems Section 9.5: Spatial Scale and Regional Planning Section 9.6: A Role for Education Science Question 3 – What is the current state of knowledge for rehabilitating adverse ecological effects associated with rural-residential and urban development? Section 10.0: Rehabilitating Aquatic Ecosystems in Developed Areas Section 10.1: Determining Rehabilitation and Enhancement Success Section 10.2: Current State of Knowledge of Various Rehabilitation Approaches Section 10.3: Common Assumptions about Successful Aquatic Rehabilitation Section 10.4: Information Needs for Rehabilitation in Developed Areas Science Question 4: What are the major research and monitoring needs for urban and rural-residential landscapes? Section 11.0: Research and Monitoring Needs References Appendix A. Indices of Biological Integrity
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