Doorway type fishway

Abstract

The invention relates to a doorway type fishway, comprising a water flow channel arranged in the dam body. The doorway type fishway is characterized in that a dam body at the low-water-level side of the water flow channel is internally provided with a door No.1 which can be opened and closed, the outer side of the door No.1 is provided with a dam tail gate, the dam body at the high-water-level side of the water flow channel is internally provided with a door No.2 which can be opened and closed, the outer side of the door No.2 is also provided with a dam upper gate, the door No.2 is provided with a plurality of induction water injection holes, a cave between the door No.1 and the door No.2 and the low-water-level side of the dam body are connected by virtue of a cave bypass valve, and the cave is connected with the high-water-level side of the dam body by virtue of a cave water injection regulating valve. By adopting the doorway type fishway provided by the invention, the problem that operating effect of various fishways in modern times is poor is solved, investment is low, no additional land area is occupied, water power consumption is low, operation is not limited by upper water level of a dam, fishes can migrate smoothly and can pass through the dam smoothly to propagate, biological diversity of the water ecosystem can be protected, harmonious co-existence of hydropower engineering and nature can be practicable, and benefit of the doorway type fishway is great.

Description

technical field [0001] The invention relates to a doorway fishway, which belongs to the field of water conservancy and hydropower engineering. Background technique [0002] In order to obtain water energy, humans build dams and build power stations on rivers, blocking the passage for fish to migrate and spawn. The number of many naturally growing fish has declined sharply, and even is on the verge of extinction; in order to save these fish, people have tried every means at any cost, and built various artificial waterways (also called fishways) for fish to migrate upstream and cross the dam. [0003] It is reported that the fish passage facilities (commonly known as "fishways") of the Itaipu Hydropower Station are 10 kilometers long, including 6 kilometers of natural "fishways" and 4 kilometers of artificially built "fishways". It was completed at the end of 2002 and cost 1200 yuan Ten thousand U.S. dollars. After swimming through the 6-kilometer-long section of the "Haojin...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a door-hole fishway, which effectively solves the problem of poor operation effect of the current fishway, huge project investment, large land area required, fishway operation is also limited by the upstream water level, and water energy loss is large. question

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