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MODIFICATIONS OF FISH LADDERS AT JOHN DAY DAM,
COLUMBIA RIVER, OREGON AND WASHINGTON
Hydraulic Model Investigation
| 题名： | MODIFICATIONS OF FISH LADDERS AT JOHN DAY DAM, COLUMBIA RIVER, OREGON AND WASHINGTON Hydraulic Model Investigation |
| 关键词： | Hydraulic models John Day Dam Columbia River Fish ladders |
| 摘要： | Prototype operation of the originally constructed fish ladders at John Day Dam revealed the need for ladder modifications to Improve fish passage. A 1:10-scale model was used to evaluate the design modifications for both the northand south-shore ladders. Improvements were desired in the flow-regulating sections and at the fish counting station for both fish ladders. The model was Instrumental in developing a successful modification to the Hell's Gate slotorifice type regulating section. The modification consisted of a slot-only design having a waalM head drop of ipproxlaately 6 Inchea. A vertical counting station was developed for the north-shore ladder. Successful operation In the prototype has verified the effectivcDess of the design. |
| 报告类型： | 科技报告 |
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