[PDF] Modification Of Fish Ladders Bonneville Dam Columbia River Oregon And Washington Hydraulic Model Investigation eBook

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Modification of Fish Ladders, Bonneville Dam, Columbia River, Oregon and Washington; Hydraulic Model Investigation

Louis Z. Perkins
Modification of Fish Ladders, Bonneville Dam, Columbia River, Oregon and Washington; Hydraulic Model Investigation by Louis Z. Perkins PDF

Author : Louis Z. Perkins
Publisher :
Page : 102 pages
File Size : 49,34 MB
Release : 1973
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ISBN :

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Modifications of the flow control sections and counting stations of the Bradford Island and Washington Shore fish ladders at Bonneville Dam were necessary to accommodate rapid pool changes which will result from fluctuating discharges caused by power peaking at hydroelectric projects upstream. Fishway operation for the extreme flood control pool range from elev 70.0 to elev 82.5 (feet above mean sea level) was considered. The normal range for design was between elev 72.0 and 80.0. A portion of the forebay, the exit control section, the counting station, the supply channel for auxiliary water, and typical sections of each ladder were studied in a 1:14-scale model. (Modified author abstract).

Spillway Gate Modification Bonneville Dam, Columbia River, Oregon and Washington

Spillway Gate Modification Bonneville Dam, Columbia River, Oregon and Washington by PDF

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Page : 0 pages
File Size : 46,63 MB
Release : 1975
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Model investigation verified that vertical vibration of the Bonneville spillway gates was caused by flow instability beneath the gate. When the gate bottom was submerged by tailwater and the gate was at certain openings, the line of flow control shifted back and forth between the gate seal near the center of the bottom and the upstream face of the gate. Pressure changes accompanying the control shifts created large changes in vertical force on the upstream half of the gate bottom. A bottom shape with a longer lip for better flow control was developed. The new shape was structurally feasible, usable in either set of existing gate slots without modification of embedded seal plates, and operable at all gate openings with negligible vertical vibration. Other shapes not usable with existing seal plates were developed but were considered less suitable.