Device and method for improving fish passing effect in fish pass by using fish phototaxis characteristics

Abstract

The invention discloses a device making use of fish phototaxis to improve fish passing effects of fishways. The device comprises a main control computer and at least one stage light guide lock chamber. Each stage light guide lock chamber comprises a fishway, an inlet fish collection lamp and an outlet fish collection lamp, wherein the inlet fish collection lamp and the outlet fish collection lamp are sequentially arranged on the cross section of the fishway, and the distance between the inlet fish collection lamp and the outlet fish collection lamp is less than the irradiation distance of the outlet fish collection lamp. When the light guide lock chamber is multi-stage, an outlet fish collection lamp of the upper stage lock chamber serves as an inlet fish collection lamp of the adjacent lower stage lock chamber. The main control computer is connected with the inlet fish collection lamp and the outlet fish collection lamp and controls opening and closing of the inlet fish collection lamp and the outlet fish collection lamp. At the same time, the invention further provides a method making use of fish phototaxis to improve fish passing effects of fishways. According to the device and the method, irradiation ranges of the fish collection lamps are indirectly expanded, the fish collection lamps can be applied to water areas with different depths, the variety of passing fishes and the number of passing fishes are increased, and universality of the fishways is enhanced.

Description

technical field [0001] The invention relates to a fishway device, in particular to a device for improving the effect of passing fish in a fishway by utilizing the phototaxis feature of fish, and belongs to the field of water conservancy and hydropower engineering environment. Background technique [0002] At present, the existing fishway design focuses on the water flow to lure fish. The basic principle is to change the geometric structure of the fishway to generate the water flow conditions that fish prefer to attract fish to pass through. However, practical research has found that the water flow conditions generated by this type of fishway often have a limited effect on attracting fish. After the fish enters the first two stages of the fishway, they linger or return to the original place, resulting in poor fish passing ability in the fishway. It is very ideal, and the fish species are limited, and the expected effect cannot be achieved. Therefore, fishway designers need t...

AI Technical Summary

Problems solved by technology

Existing practice shows that as long as the brightness (power) of the fish-collecting lamp is set in a reasonable range, a large number of fish can be successfully lured; The difference is large, the fishway is designed with a small bottom slope and a long distance, and it is still difficult to directly use the fish collection light

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