fish pass

A fishway and swimming pool technology, applied in the field of ecological restoration engineering, can solve problems such as the increase in length of fishway hub projects, fish not getting enough rest, and mechanical damage to fish bodies in upward tracing. Good energy dissipation effect and constant flow rate

Active Publication Date: 2014-10-29
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Embodiment

[0032] Adopt the fishway of prior art to compare with the fishway among the present invention as comparative example, refer to image 3 and Figure 4 , three pond chamber vertical seams 24 chosen among the present invention are identical with three pond chamber vertical seams 24 of the prior art in respective fishways, and are numbered 1, 2, 3 in pairs respectively. The following table is a comparison table of the water flow velocity at the vertical seam of the fishway of the present invention and the fishway of the prior art:

[0033]

[0034] From the above table, it can be clearly seen that the water flow velocity at 24 vertical seams of the pond chamber of the fishway structure of the present invention is much smaller than that at 24 vertical seams of the pond chamber of the fishway structure of the prior art. The resistance to fish will be greatly reduced, and it will be easier for fish to pass through the fishway, which will greatly increase the number of fish passin...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B8/08
CPCY02A40/60
Inventor 职小前李亚农王泽溪张连明蒋红郎建陈静周小波夏勇王丽
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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