Effects of Protective Plates and Stoplogs on Water Flow Through the Gleed Fish Screen Facility, April 2007 - September 2007.

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Description

In 2007, Pacific Northwest National Laboratory was asked by the U.S. Bureau of Reclamation to provide additional velocity measurements at Gleed fish screens site to support decisions on mitigating extreme flow fluctuations near the screens. The site consistently has had extreme water velocities in places and a strong back eddy at the downstream end in spring and summer. With the help of Washington Department of Fish and Wildlife staff, we measured the effects of different stoplog configurations behind the screens in May and July 2007. Protective metal plates in front of the trash racks were confirmed to be the cause ... continued below

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14 pages

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Chamness, Mickie December 3, 2007.

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Description

In 2007, Pacific Northwest National Laboratory was asked by the U.S. Bureau of Reclamation to provide additional velocity measurements at Gleed fish screens site to support decisions on mitigating extreme flow fluctuations near the screens. The site consistently has had extreme water velocities in places and a strong back eddy at the downstream end in spring and summer. With the help of Washington Department of Fish and Wildlife staff, we measured the effects of different stoplog configurations behind the screens in May and July 2007. Protective metal plates in front of the trash racks were confirmed to be the cause of uneven and extreme water flow past the vertical traveling screens. Stoplogs were not sufficient to significantly reduce the effect of those metal plates on water velocities past and through the site. We provide a few suggestions including making it easier to raise and lower the metal plates and then adjusting them more often, constructing a new trash rack across the diversion entrance, and raising the control gate at the end of the site as long as possible in spring and during flood events.

Physical Description

14 pages

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  • Related Information: document dated October 2007

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  • Report No.: P104750
  • Grant Number: 26934 REL 1
  • DOI: 10.2172/962138 | External Link
  • Office of Scientific & Technical Information Report Number: 962138
  • Archival Resource Key: ark:/67531/metadc932939

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • December 3, 2007

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 5, 2016, 2:46 p.m.

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Chamness, Mickie. Effects of Protective Plates and Stoplogs on Water Flow Through the Gleed Fish Screen Facility, April 2007 - September 2007., report, December 3, 2007; Portland, Oregon. (digital.library.unt.edu/ark:/67531/metadc932939/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.