Optimizing the entrance location for a fish pass facility with limited attraction flow in a large river — A case study of the Jinsha River, China

The fish pass facility of the Suwalong hydropower project (SHP) is one of the fish pass facilities in the Jinsha River with limited attraction flow. The bed elevation was raised and a shunt wall was added to optimize aggregation zones in the tailrace channel of the SHP. The flow field, fish migratio...

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Bibliographic Details
Published inCanadian journal of civil engineering Vol. 46; no. 9; pp. 847 - 857
Main Authors Li, Guangning, Sun, Shuangke, Liu, Haitao, Zheng, Tiegang
Format Journal Article
LanguageEnglish
Published Ottawa NRC Research Press 01.09.2019
Canadian Science Publishing NRC Research Press
Subjects
Agglomeration
Aggregation
aggregation zone
Attraction
Canals
champ d’écoulement
Computational fluid dynamics
Computer applications
Corridors
couloir migratoire
Discharge
entrance
entrée
Fish
Fish migration
fish pass facility
Flow
flow field
Fluid dynamics
Fluid flow
Hydrodynamics
Hydroelectric power
installation de passe à poissons
Methods
migration corridor
Migrations
obstacle au débit
Optimization
Rivers
Tailrace
Three dimensional flow
velocity barrier
zone d’agrégation
China
Jinsha River
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Summary:The fish pass facility of the Suwalong hydropower project (SHP) is one of the fish pass facilities in the Jinsha River with limited attraction flow. The bed elevation was raised and a shunt wall was added to optimize aggregation zones in the tailrace channel of the SHP. The flow field, fish migration corridors, and aggregation zones were analyzed using computational fluid dynamics software Flow-3D. Raising the bed elevation can accelerate the water, and new velocity barriers can be formed. Adding a shunt wall can split the flow. These two methods are effective for creating fish migration corridors and aggregation zones in the tailrace discharge. As the fish pass facility attraction flow cannot compete with the main current of the river, it is reasonable to first attract the fish from the river into the aggregation zone in the tailrace channel through the tailrace discharge and then set the entrance within the zone. These two methods were utilized to enhance the attraction efficiency through optimizing the entrance location.
ISSN:0315-1468
1208-6029
DOI:10.1139/cjce-2018-0523