Intake Structure Operation Study, Lost Creek Dam, Oregon
Abstract
An investigation was made into reservoir release operations at the Lost Creek Dam, located on the pristine Rogue River which provides habitat to a valuable anadromous fishery. This fishery is highly temperature sensitive. Multiple-level selective withdrawal technology is presently used to meet established downstream temperature targets that would best suit the fishery. These target temperatures are adequately approximated in the releases for part of the year; however, in the fall, winter, and early springs, the releases are warmer than desired. This problem is thought to be contributing to a lower-than- desirable survival rate among the young salmonids. This study provided a means of predicting the intake port openings to meet the desired release temperature most closely and investigated the potential for improving the long-term operational strategies for this structure. To develop a prediction capability for the intake structure, the site-specific characteristics of selective withdrawal and simultaneous multiple-level withdrawal were studied. A 1:80-scale physical model was tested in both density stratified and homogeneous density environments. An optimization routine was used to evaluate the effects of short- term operational modifications on the reservoir's long-term ability to meet release targets. An alternative set of target temperatures provides inherent resource conservation when used on a daily basis in lieu of the original targets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1989
- Accession Number
- ADA210588
Entities
People
- Stacy E. Howington