Ecological fishway with multi-level flow velocity channels

Abstract

The invention discloses an ecological fishway with a multi-stage flow velocity channel, including a fish pond, which at least includes a low flow velocity fish passage, a medium flow velocity fish passage and a high flow fish passage; a low flow velocity fish passage, a medium flow passage Both the fish channel and the high-velocity fish channel are formed in the fish pond, and the extension directions of the low-velocity fish channel, the medium-velocity fish channel and the high-velocity fish channel are consistent with the direction of the water flow. By implementing the technical solution of the present invention, the ecological fishway can meet the migration needs of various fish in the river fish ecological community, and the fish passing effect of the fishway is improved. Thereby the species of passing fish increases, and species diversity and ecological balance can be maintained.

Description

technical field [0001] The invention relates to the technical field of dam protection for migratory fish, in particular to an ecological fishway with multi-stage flow velocity channels. Background technique [0002] Fishway is an extremely important part of modern water conservancy projects involving "harmonious coexistence between engineering and nature". Resources, water purification, maintenance of species diversity and ecological balance are all of great significance. [0003] At present, there are many types of fishways, mainly including technical fishways and ecological fishways such as pool-type fishways, baffle-type fishways (Daniel fishways), vertical-slotted fishways, but no matter what type of fishway it is, Its designs are all aimed at a specific fish object, such as fish with high economic value, such as salmon, trout, etc., or some rare and unique fish, such as Chinese sturgeon. However, in natural river water ecosystems, there are generally dozens or even hu...

AI Technical Summary

Problems solved by technology

However, in natural river water ecosystems, there are generally dozens or even hundreds of fish species that form communities. Various fishes have different migration periods and adapt to different flow velocities in each migration period. Therefore, the traditional fishway design has great advantages. Large limitations lead to a single species of fish, which cannot maintain species diversity and ecological balance

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