Event Title

Session D5: Case Studies of Fish Passages for High Dams in China

Location

Groningen, The Netherlands

Event Website

http://fishpassage.umass.edu/

Start Date

23-6-2015 2:30 PM

End Date

23-6-2015 2:45 PM

Description

Abstract:

High dams created benefits for China in flood control, power capacity, navigation and irrigation. Along with the development of environmental regulations, development of fish passage structures at high dams are of high interest in China. There are hundreds of fish passage structures will be built in the near future for fish upstream migrating across high dams. We present one fish collection system and one fish lift design for dams higher than 100m and discuss the technical challenges during design. The fish collection system consists of a floating barge, guidance net, light and bubble curtain at the bank, together with a reserved navigation route matched with bubble curtain and strobe light exclusion system which allow passage of boats but not fish. The fish lift concept consists of fish attraction channel, holding pool crowder hoist, tank hoist, with a track that transports fish for more than 100m. Both fish passage facilities were designed with the procedures including: 1) requirement by government, 2) fish population survey, 3) evaluation with respect to site hydraulics and hydrology to model the working situations for fish passage, 4) structure design for fish passage, 5) planned biological evaluation as part of the design process. Although these designs have utilized knowledge from western world and are expected to help fish conservation with positive results, a huge gap between knowledge of fish behavior and fish passage design make the success of the proposed fish passage structures uncertain, and the very limited fish population at the site also questions the necessity of fish passage. Further, no downstream passages were considered for the high dams till now.

Comments

Presenting Author Bio: Xiaotao Shi is a professor with the China Three Gorges University. He focused on fish swimming performance quantification during upstream and downstream migration together with hydraulic analysis, aiming at adapting and developing fish passage techniques for Chinese fishes. Related research topics include fish behavior at various environment, fish passage design and methods to improve survival of fishes.

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Jun 23rd, 2:30 PM Jun 23rd, 2:45 PM

Session D5: Case Studies of Fish Passages for High Dams in China

Groningen, The Netherlands

Abstract:

High dams created benefits for China in flood control, power capacity, navigation and irrigation. Along with the development of environmental regulations, development of fish passage structures at high dams are of high interest in China. There are hundreds of fish passage structures will be built in the near future for fish upstream migrating across high dams. We present one fish collection system and one fish lift design for dams higher than 100m and discuss the technical challenges during design. The fish collection system consists of a floating barge, guidance net, light and bubble curtain at the bank, together with a reserved navigation route matched with bubble curtain and strobe light exclusion system which allow passage of boats but not fish. The fish lift concept consists of fish attraction channel, holding pool crowder hoist, tank hoist, with a track that transports fish for more than 100m. Both fish passage facilities were designed with the procedures including: 1) requirement by government, 2) fish population survey, 3) evaluation with respect to site hydraulics and hydrology to model the working situations for fish passage, 4) structure design for fish passage, 5) planned biological evaluation as part of the design process. Although these designs have utilized knowledge from western world and are expected to help fish conservation with positive results, a huge gap between knowledge of fish behavior and fish passage design make the success of the proposed fish passage structures uncertain, and the very limited fish population at the site also questions the necessity of fish passage. Further, no downstream passages were considered for the high dams till now.

https://scholarworks.umass.edu/fishpassage_conference/2015/June23/63