Automatic water level raising fishway

Abstract

A fishway with automatically-lifting water level comprises three stages of fish chambers in ladder-like arrangement, wherein the inner side of a water inlet wall of the first stage of fish chamber is provided with a first siphon communicated with the outer part, the outer side of a water outlet wall of the first stage of fish chamber is provided with a second siphon, the second stage of fish chamber is communicated with a second communicating vessel, a second twisting type opening-closing door is matched with a second fish-passing gate opening, a water outlet wall of the second stage of fish chamber is provided with a third fish-passing gate opening, a turning plate gate is mounted on a fish outlet formed in the lower part of a water outlet wall of the third stage of fish chamber, and the height of the upper end of the first stage of fish chamber is greater than that of the upper end of the third stage of fish chamber. The fishway with the automatically-lifting water level can be used for solving the problems of the existing fishways, is smaller in length, convenient to arrange, suitable for different terrain and geology conditions, and well adaptive to the waterhead size change of the upstream and the downstream of a reservoir and the water level change of the reservoir; the water level automatically lifts, labor needed during passing of fish is saved, and fish in different sizes can pass; the whole fishway can automatically run without additional power, and energy is saved.

Description

technical field [0001] The invention relates to a fishway suitable for water conservancy projects, in particular to an automatic water level raising fishway suitable for solving the problem of fish migration in high-water-head pivot projects with various terrain conditions. Background technique [0002] Building dams on natural rivers to develop and utilize water resources will benefit the people, but it will also have some negative impacts on the ecological environment. For fish, it mainly blocks the migration channels of fish and destroys production. Spawning grounds and reduction of fishery resources. This is often devastating to migratory or semi-migratory fish that undergo extensive migrations as they complete their life history. The construction of water conservancy dams will inevitably affect the connection between upstream and downstream organisms. Some organisms cannot visit the habitat they need. Over time, this habitat may become extinct, and the entire watershed...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an automatic water level raising fishway, which can solve the problems of existing fishways, is short in length, easy to arrange, and is suitable for different terrain and geological conditions; Good adaptability to water level changes; the water level rises automatically, saving the physical strength required for fish to pass, and is suitable for passing fish of different sizes; the entire fishway can run automatically without additional power, saving energy

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