Fishway inlet water replenishing and energy dissipation structure and design method

Abstract

The invention discloses a fishway inlet water replenishing and energy dissipation structure and a design method, and belongs to the technical field of fishway design. The fishway inlet water replenishing and energy dissipation structure comprises a water replenishing pipe, an energy dissipation pool, brackets, energy dissipation cover plates and a water permeable grating. The water replenishing pipe is a water replenishing steel pipe, the energy dissipation pool is a water replenishing steel pipe outlet water gathering pool, the brackets are located at the top of the energy dissipation pool and are used for supporting the energy dissipation cover plates, the energy dissipation cover plates are located on the brackets, gaps between the energy dissipation cover plates are different, water replenishing outflow is relatively uniform, water replenishing flow enters a fishway from the gaps between the energy dissipation cover plates, and a large-scale turbulence vortex group is forcibly changed into small-scale vortex groups; after the size of the vortex is reduced, viscous shear stress easily converts turbulent kinetic energy into fluid internal energy to be dissipated, and the turbulent kinetic energy in the fishway is reduced; and the water permeable grating is fixed to the energy dissipation cover plates, a water replenishing water body enters the fishway from the energy dissipation pool through secondary energy dissipation of the energy dissipation cover plates, disorder of the water body caused by water replenishing can be reduced to the maximum extent, and smooth migration of fishes in the fishway is ensured.

Description

technical field [0001] The invention relates to the technical field of fishway design, in particular to a fishway inlet water supplement and energy dissipation structure and design method. Background technique [0002] The success or failure of the fishway operation is mainly determined by two aspects: 1) whether the fish can find the entrance; 2) whether the fish can pass through smoothly. Therefore, the effectiveness of the fishway is closely related to the swimming behavior of the target fish. Specifically, the current characteristics of fish are mainly used in the design of the flow field at the inlet of the fishway; the swimming indicators such as the gram flow velocity and fatigue time of the fish are mainly used in the design of the flow velocity of the fishway. [0003] The location selection of the fishway entrance belongs to the interdisciplinary research field of fish behavior and hydraulics, and whether the setting is appropriate or not directly affects the fish...

AI Technical Summary

Problems solved by technology

[0005] When the fishway replenishes water, the replenishment water mixes with the water body in the fishway pond chamber, which will cause obvious disturbance to the water body in the fishway, cause the flow state in the fishway to be disordered, and adversely affect the upward migration of fish. Therefore, a fishway inlet is required. The water supply and energy dissipation structure and design method are to meet the stable water flow conditions in the fishway. Based on this, the present invention designs a fishway inlet water supply and energy dissipation structure and design method to solve the above problems

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