AWWA ACE95006

In the Portland Metropolitan Area (Oregon), twenty-seven municipal water providers are evaluating the regional water supply outlook regarding long-term demands, water availability, water quality, and system needs. A critical component is the determination of how much water is available for future municipal purposes from the Bull Run, Columbia, Clackamas, Willamette and Trask rivers. As part of the overall integrated resources planning projects, Montgomery Watson performed a water availability study involving drought year hydrology; planning level reservoir operations models; instream flow considerations; fish species that are listed, or may be listed, under threatened or endangered species criteria; and numerous other political-environmental issues. This paper summarizes the methods and results of the water availability study. The instream flow picture in the northwest is in a period of rapid change, primarily due to concerns over rare and endangered fish species. Eleven categories of instream flow considerations were identified, ranging from certificated instream water rights to emerging or recent recommendations by resource agencies or environmental organizations. These considerations will impact future water use significantly.

Product Details

Published:

01/01/1995

ISBN(s):

0898678323

Number of Pages:

7

File Size:

1 file , 310 KB