Overlapping arc fishway with variable hydraulic gradient and fish passing method

Abstract

The invention discloses a superimposed arc type hydraulic-slope-variable fishway and a fish passing method, and relates to the field of ecological environment of fish passing buildings and water conservancy and hydropower projects. The superimposed arc type hydraulic-slope-variable fishway is composed of a bottom plate with a plurality of steps, wing walls, a water retaining structure, a drive assisting structure, an inductor and a master controller, wherein the bottom plate and the water retaining structure can form a temporary pool so that the hydraulic slope of the fishway unit can be reduced and the hydrodynamic condition beneficial to upstream swimming of fish can be formed; and the drive assisting structure can assist fish in quickly and efficiently swimming upwards. Compared with a traditional fishway, the length of the fishway can be decreased, construction cost can be reduced, the waterflow condition of the fishway is easy to control, the fishway is suitable for dams with different delivery lifts to allow passing of fish, and the fishway has broad application prospects and remarkable economic and ecological benefits.

Description

technical field [0001] The invention relates to the field of fish-passing buildings and water conservancy and hydropower engineering ecological environments, in particular to a superimposed-arc fishway with variable hydraulic gradient and a fish-passing method. Background technique [0002] The construction of water conservancy and hydropower projects provides guarantees for regional flood control safety, power generation, irrigation, and water supply, but while promoting the service functions of rivers, it also produces certain negative effects. The dam raises the water level and blocks the river, leading to a series of changes in the energy flow, material cycle and information transmission of the open and continuous system of the natural river, which makes the habitat conditions and hydrological conditions required for the survival of the fish living in it changes, ultimately affecting fish stocks. In order to protect natural fishery resources and ensure the continuity an...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to solve the problem of too long fishway and high cost when the existing fishway technology is used in the middle and high head water conservancy projects, at the same time, reduce the requirements of the traditional fishway on the ability of fish to control flow and continuous jumping ability, improve the The effect of passing fish in fishways, protecting natural fishery resources, and ensuring the continuity and diversity of aquatic ecosystems, the present invention provides a superimposed arc type fishway with variable hydraulic gradient and a method for passing fish

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