Flows of the Columbia River, although modified substantially during the twentieth century, still vary considerably between seasons and between years. Lowest flows tend to occur during summer months when demand for irrigation water is at its highest and when water temperatures are greatest. These periods of low flows, high demand, and high temperature are critical periods for juvenile salmon migrating downstream through the Columbia River hydropower system.
Although impacts on salmon of any individual water withdrawal may be small, the cumulative effects of numerous withdrawals will affect Columbia River flows and would pose increased risks to salmon survival. The body of scientific knowledge explaining salmon migratory behavior and physiology is substantial, but imperfect, and decision makers should acknowledge this and be willing to take action in the face of uncertainties.
In order to provide a more comprehensive water permitting process, the State of Washington, Canada, other basin states, and tribal groups should establish a basin-wide forum to consider future water withdrawal application permits. If the State of Washington issues additional permits for water withdrawals from the Columbia River, those permits should contain provisions that allow withdrawals to be curtailed during critical high-demand periods.
Table of Contents
|2 Development and Changes in the Columbia River Basin||27-41|
|3 Hydrology and Water Management||42-70|
|4 Environmental Influences on Salmon||71-106|
|5 Water Laws and Institutions||107-145|
|6 Better Management of Existing Water Supplies||146-174|
|7 Water Resources Management, Risks, and Uncertainties||175-198|
|Appendix A: Columbia River Initiative Draft Management Scenarios, July 7, 2003||221-228|
|Appendix B: Resources Group||229-229|
|Appendix C: Calculations on Annual Discharges of Water from the Columbia Basin Project||230-234|
|Appendix D: Climate Change and Hydrologic Impacts||235-237|
|Appendix E: Committee Biographical Information||238-243|
|Appendix F: National Research Council Board Membership and Staff||244-246|
Find relevant information like your own rough draft from among the thousands of reports available for free at NAP.edu. Copy and paste up to 8 pages of content—whether from your own draft or an outside article—and Reference Finder will recommend NAP publications related to your text.
View Reference Finder
The National Academies Press (NAP) has partnered with Copyright Clearance Center's Rightslink service to offer you a variety of options for reusing NAP content. Through Rightslink, you may request permission to reprint NAP content in another publication, course pack, secure website, or other media. Rightslink allows you to instantly obtain permission, pay related fees, and print a license directly from the NAP website. The complete terms and conditions of your reuse license can be found in the license agreement that will be made available to you during the online order process. To request permission through Rightslink you are required to create an account by filling out a simple online form. The following list describes license reuses offered by the National Academies Press (NAP) through Rightslink:
Click here to obtain permission for the above reuses. If you have questions or comments concerning the Rightslink service, please contact:
Rightslink Customer Care
Tel (toll free): 877/622-5543
To request permission to distribute a PDF, please contact our Customer Service Department at 800-624-6242 for pricing.
To request permission to translate a book published by the National Academies Press or its imprint, the Joseph Henry Press, please click here to view more information.
Loading stats for Managing the Columbia River: Instream Flows, Water Withdrawals, and Salmon Survival...