Imitation natural ecological fishway and construction method thereof

Abstract

The invention provides an imitation natural ecological fishway and a construction method thereof. A cross section of the structure of the imitation natural ecological fishway is trapezoid, a second composite geomembrane (5), a fine sand layer (4), a first composite geomembrane (3), a sand material gradation gravel transition layer (2), and a gabion mesh stone cage bottom slope (1) are successivelyarranged from bottom to top; and a plurality of masonry partitions (6) are arranged on the gabion mesh stone cage bottom slope (1) in the extension direction of the imitation natural ecological fishway. Compared with a traditional fishway, the imitation natural fishway maximumly builds an environment similar to a natural migration passage of fishes before construction of water conservancy projects, local natural building materials are used as far as possible, the imitation natural ecological fishway is closer to natural conditions, and thus the better fish passing effect is realized.

Description

technical field [0001] The invention relates to the field of fishway construction in water conservancy and hydropower projects, in particular to a fishway imitating natural ecology and a construction method thereof. Background technique [0002] The history of fish passing facilities in foreign countries is more than 300 years earlier than that in our country. According to incomplete statistics, by the early 1960s, there were more than 200 fish passing facilities in the United States and Canada, more than 100 in Western European countries, and more than 18 in the former Soviet Union. These fish passing facilities are mainly fishways. By the late 20th century, the number of fishways had increased significantly, with nearly 400 in North America and more than 1,400 in Japan. The construction of these fishways has created good conditions for the restoration of river ecology. [0003] Compared with foreign fishways, the research on fishways in my country started relatively late...

AI Technical Summary

Problems solved by technology

Moreover, the various fishways that have been built and put into use are gradually becoming abandoned due to problems such as improper management and maintenance, unsatisfactory operation results, and low attention.

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