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Diaphragm type fishway

A diaphragm type and diaphragm technology, applied in water conservancy projects, marine engineering, climate change adaptation and other directions, can solve problems such as small fish migration obstacles, and achieve the effects of reducing resistance, saving water and energy.

Pending Publication Date: 2020-03-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The baffles of the stepped fishways generally have vertical seams, and the baffles of the stepped fishways will greatly hinder the migration of small fish; the water flow velocity of the vertical seams of the stepped fishways will also hinder the migration of small fishes

Method used

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Examples

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Embodiment Construction

[0013] Assuming that there are n diaphragms in the fishway, n water bodies are formed, and all the diaphragms drop due to gravity at the initial moment. The most upstream diaphragm is called the first diaphragm, and the water body above the first diaphragm is called the first water body. The water level of the most downstream water body submerges the center of the nth diaphragm at its lowest level by about 0.3 meters. When a certain number of fish are detected in the nth water body, that is, the penultimate water body, the nth diaphragm, that is, the last diaphragm Rise to the same height as the center point of the diaphragm and the edge of the fishway and stay still. Water accumulates in the body of water between the nth diaphragm and the n-1th diaphragm (not yet raised). When the water overflows the nth diaphragm (at this time, the water body between the n-1th diaphragm and the nth diaphragm will be higher than the height of the center part of the n-1th diaphragm, so that t...

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Abstract

The invention provides a diaphragm type fishway, and relates to fishways, in particular to cascade fishways which provide assistance to fish migration. The section of the fishway in the vertical direction is in a U shape, namely a hollow cuboid with an opening at the upper end. The bottom slope of the fishway is 0.015-0.035, a plurality of diaphragms are fixed on the left sidewall, the bottom surface and the right sidewall of the fishway in a sealed manner, and the central part of each diaphragm can rise and fall; when the centers of the diaphragms are located at the lowest positions, the diaphragms divide the fishway into a plurality of water bodies, namely cascade fishway bodies; and when the centers of the diaphragms are located at the highest positions, the water body enclosed by eachdiaphragm and the fishway can be connected with the water body enclosed when the center of the previous diaphragm is located at the lowest position to form a water body, that is, when the diaphragm isin the highest position, after the fishway is filled with water, the central part of the previous diaphragm at the lowest position can be submerged. Fish can inhabit in the fishway; for larger fishes, the fishes can also jump up in a cascade fishway manner; and the flow of water can be reduced, so the water is saved, the water is used for generating electricity, and energy sources can be saved.

Description

technical field [0001] The invention relates to a fishway, in particular to a device for assisting fish migration with stepped fishways. Background technique [0002] Existing fishways generally adopt the way of energy dissipation, and there are certain flow velocity and energy dissipation obstacles. The baffles of the stepped fishways generally have vertical seams, and the baffles of the stepped fishways greatly hinder the migration of small fishes; the water velocity of the vertical seams of the stepped fishways also hinders the migration of small fishes. Contents of the invention [0003] To provide assistance for migrating fish, the invention designs a membrane-type fishway (belonging to the category of stepped fishways). [0004] The technical solution adopted by the present invention to achieve the purpose of the invention is: a diaphragm type fishway, which is characterized in that: the vertical section of the fishway is U-shaped, that is, a hollow cuboid with an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/08
CPCE02B8/08E02B8/085Y02A40/60
Inventor 陈铨艺胡再国
Owner SICHUAN UNIV
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