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Study on the Optimization of Fishway Inlet
Fishway is the only path through which the aquatic animal fauna can smoothly pass obstruction of its upstream migration. The conventional design and study of fishway are mainly focused on the internal structure and flow conditions, while the researches on the layout of fishway inlet and the optimization of fishway structure are relatively less. That leads to difficulties or even impossibilities for fishes to enter the fishway in engineering applications. In this paper, the principles of the fishway inlet location selection were verified by numerical simulations through establishing the ecological hydraulics indexes of fishway inlet as well as combining the fish swimming performance with the flow pattern index of fishway inlet. What's more, a new fishway inlet structure which can control the discharge and velocity was proposed so as to take into account the role of tempting fish and making up water. Through the above methods, the fishway inlet has been optimized and it can help fish smoothly finish migration.
Keywords
Fishway Inlet, Ecological Hydraulics, Indexes, Numerical Simulation, Upstream Migration.
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