Adjusted Streamflow and Storage 1928-1989
Adjusted Streamflow and Storage 1928-1989

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Published: 1993

Total Pages: 337

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The development of irrigation projects since the 1830's and the construction of major dams and reservoirs since the early 1900's have altered substantially the natural streamflow regimen of the Columbia River and its tributaries. As development expanded a multipurpose approach to streamflow regulation evolved to provide flood control, irrigation, hydropower generation, navigation, recreation, water quality enhancement, fish and wildlife, and instream flow maintenance. The responsible agencies use computer programs to determine the effects of various alternative system regulations. This report describes the development of the streamflow data that these computer programs use.

Technical Appendix for Development for Modified Streamflows 1928-1989
Technical Appendix for Development for Modified Streamflows 1928-1989

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Published: 1993

Total Pages: 449

ISBN-13:

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The report ''Adjusted Streamflow and Storage 1928-1989'' contains listings of historical flows for the sites in the Columbia River and Coastal Basins. This section of the Technical Appendix provides for the site specific procedures used to determine those historical flows. The study purpose, authority, and definitions are given in the main report. The purpose of this section of the Technical Appendix is to document the computational procedures used at each of the project sites to develop historical flows for the period July 1928--September 1989.