Imitation of natural fishway adapted to fish with different swimming abilities

Abstract

The invention discloses a nature-imitated fishway adapted to fishes with different swimming abilities, and relates to the ecological field of fish passing structures and water conservancy and hydroelectric engineering. The nature-imitated fishway comprises fishway outer wing walls, a fishway bottom plate and a plurality of fishway units. Fish upstream outer passages with the small flowing speed are formed between the fishway outer wing walls and fishway inner wing walls, and fish upstream inner passages with the large flowing speed are formed between the fishway inner wing walls of the same fishway unit; the outer passages and the inner passages are combined to form multiple hydrodynamic conditions to meet the upstream demands of the fishes with the different swimming abilities; and the fishway units are internally provided with deflection plates which automatically adjust the magnitude of the opening degree according to the flow magnitude and water depth change, so that the proper flow speed for passing of the fishes is easily formed at fish passing vertical seams. Compared with a tradition fishaway, according to the nature-imitated fishway adapted to the fishes with the differentswimming abilities, the diversified water flow conditions can be formed, environmental suitability of fish upstream is enhanced, and the migratory efficiency of the fishes with the different swimmingabilities is improved.

Description

technical field [0001] The invention belongs to the technical field of fish-passing buildings and water conservancy and hydropower engineering ecological environments, and in particular relates to a natural-imitation fishway suitable for fish with different swimming abilities. Background technique [0002] In rivers all over the world, humans have built numerous hydraulic structures such as gates, dams and weirs on rivers for the purposes of flood control, power generation, irrigation, shipping and water supply. According to statistics, my country has built more than 98,000 reservoir dams, and other water conservancy facilities such as gates and weirs have reached an immeasurable level. These water retaining structures directly block the connectivity of the river flow, destroy the topography and landform of the original river channel, and hinder the upward movement of fish, which changes the habitats of aquatic organisms such as fish and shrimp. The number and species of aqu...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an imitation natural fishway suitable for fish with different swimming abilities, and solves the problem of single structure of the existing fishway and difficulty in passing through the fish mouth or the vertical seam. The problem of automatic adjustment of the flow rate to meet the needs of fish with different swimming abilities to migrate upwards, assist migratory fish to cross the dam in time with low physical energy consumption, improve the fish passing effect of the fishway, protect natural fishery resources, and ensure the protection of the aquatic ecosystem. Continuity and Diversity

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