Streamline variable section recoil energy dissipation fishway with fish luring function

Abstract

The invention provides a flow-line variable-cross-section back-flushing energy dissipation fishway with a fish luring function. The flow-line variable-cross-section back-flushing energy dissipation fishway comprises bottom plates, back-flushing water outlets, a base, flow-line-type combination side walls, back-flushing waterways, a lower chamber, an underwater water outlet; the flow-line-type combination side walls are uniformly arranged along the whole fishway; the back-flushing waterways are formed in the bottom plates and are located at downstream parts which are 60 cm away from narrowest parts of the fishways defined by the left and right flow-line-type combination side walls; the lower chamber is arranged below the bottom plates; the underwater water outlet is formed in a bottom partof a tail end of the lower chamber; and each back-flushing waterway is of a curve-surface structure of which the lower part is large and the upper part is small. The flow-line variable-cross-section back-flushing energy dissipation fishway has the beneficial effects that flowing speed and flow of bottom-layer water flows of the water outlets of the fishway are increased through bottom-layer high-pressure water flows, and a fish luring effect of the water outlets in the fishway is improved; back-flushing water flows and flow-line-type fishway side walls are designed, so that water flow energy in the fishway is dissipated; the flowing state and flowing speed of water flows in the fishway are improved; and a fish passing rate of the fishway is improved.

Description

technical field

[0001] The invention belongs to the technical field of water conservancy engineering, in particular to a recoil energy-dissipating fishway with variable streamline cross-section and the function of luring fish. Background technique

[0002] Migration is an active, regular, cyclical movement of some fish species that repeats annually as the stages of the fish life cycle progress; dam construction blocks fish migration, which has a negative impact on fish reproduction and river There is a relatively large potential threat to the ecology of the dam; as an important facility for migratory fish and other aquatic animals to pass through the artificial dam, the fishway plays an important role in coordinating the contradiction between the dam construction and the ecological environment. to meet the requirements of migratory fish going up or down the river; the existing fishways, including hundreds of patented technologies, mainly include simple trough type, Daniel ty...

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