fish pass

Abstract

The invention discloses a fishway which is used for ecological restoration engineering, especially for water conservancy and hydropower engineering. The fishway provided by the invention not only can provide a quiet rest place for fish migrating through the water conservancy and hydropower engineering, but also cannot increase the integral length of the fishway. The fishway comprises a side wall and a partition plate structure, wherein the partition plate structure is arranged on the side wall for dividing the fishway into a plurality of swimming pools; the swimming pools are communicated with each other; the fishway further comprises a rest pool which is arranged between two swimming pools, wherein the rest pool and the swimming pools are separated by the partition plate structure and are communicated with each other; and the rest pool is wider than the swimming pools. Since the rest pool is wider than the swimming pools, so the part, projected out of the swimming pools, of the rest pool is not directly affected by water flow in the fishway, and the water flow in the projected part is clam, so as to be suitable for the fish to rest during breeding migration; moreover, only the rest pool is widened, so that the integral length of the fishway is not increased.

Description

technical field [0001] The invention relates to an ecological restoration project, in particular to a fishway used in water conservancy and hydropower projects. Background technique [0002] The construction of hydropower and water conservancy projects can provide humans with relatively clean energy. However, in the actual implementation process, its impact on the ecological environment is very huge, especially the impact on the local river ecology. The construction of the dam has raised the water level and blocked Breaking the river makes it difficult for fish to migrate, especially for fish that need to migrate to spawn, it almost brings disaster. Therefore, the current relatively mature technology is to build fishways in hydropower and water conservancy projects, so that fish can Migrate smoothly. As an ecological restoration measure to mitigate the impact of fish being blocked by hydropower and water conservancy projects, fishways have attracted more and more attention ...

AI Technical Summary

Problems solved by technology

Domestic fishways usually set up a rest pool for every ten pool rooms, the bottom slope of the rest pool is 0, and the length of the rest pool is twice that of ordinary pool rooms, so that the migrating fish can obtain a certain rest space, but it is longer The length of the fishway hub project has increased due to the rest pool; and the flow state in the rest pool is still relatively turbulent, and the fish have not been able to get enough rest

At present, the rest pool design scheme of domestic fishway engineering is usually difficult to achieve the desired effect

According to the characteristics of domestic hydropower projects and the characteristics of migratory fish, fishway ponds generally choose the vertical seam type, but because there are few projects for reference, often due to improper selection of parameters such as the size of the diaphragm and the structure type, there will be problems. The energy dissipation effect of the partition is poor, the flow state of the pool chamber is unstable, and it is easy to cause mechanical damage to the upward fish body.

Images