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Rectification pool type fishway and flow state control method

A pond-type fishway and fishway technology, which is applied in the field of fishway and fishway flow control, can solve the problems of poor adaptability to complex flow conditions, small individuals, and small flow rate capabilities, and achieve the protection or restoration of river ecological environment , The effect of improving the efficiency of fish passing

Active Publication Date: 2014-05-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the "four major family fish", swordfish, perch, sweetfish, eel, etc., the individuals are small, the ability to overcome the flow velocity is small, and the ability to adapt to complex flow regimes is poor, so there are few studies

Method used

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  • Rectification pool type fishway and flow state control method
  • Rectification pool type fishway and flow state control method
  • Rectification pool type fishway and flow state control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment is a kind of rectification type pond type fishway, as figure 1 shown. This embodiment includes: a plurality of continuous step-shaped elevated pool chambers 1, and rectifying plates 2 with a plurality of flow holes 3 arranged up and down, left and right are arranged between each of the pool chambers.

[0023] This embodiment adopts pool-type energy dissipation, eliminates the upstream and downstream water head difference formed by the gate dam through the stepped pool chamber, and the water flowing out through the flow hole reduces part of the flow rate head in the pool, and at the same time flows out through the flow hole The water flow interferes with the water flow overflowing from the top of the rectifying plate to form a smooth water flow.

[0024] The water flow pattern produced by the traditional fish pond-shaped fishway is as follows: figure 2 shown. The water tongue produced by the overflow will produce forward and backward positive and nega...

Embodiment 2

[0031] This embodiment is an improvement of the first embodiment, and it is a refinement of the first embodiment about fish ponds. The ratio between the width and the length of the fish pond described in this embodiment is: 1:1.25 to 1:1.5. The height is generally 1.5 ~ 2.5m.

[0032] The ratio of the width, length and height of the fish pond is determined according to the water level difference between the upstream and downstream of the dam, the flow rate of the fishway and the type of fish species.

Embodiment 3

[0034] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment. The flow hole of the rectifying plate described in this embodiment is one of circular, elliptical, and rectangular flow holes.

[0035] The selection of the flow hole is determined according to factors such as the type of fish passing through and the flow rate of the fishway, especially the small fish passing through the fishway by drilling. When the small-sized fishes are mainly crabs, the elliptical holes or long holes with the major axis level on the cross-sectional shape are used to facilitate the passage of crabs.

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Abstract

The invention relates to a rectification pool type fishway and a flow state control method. The rectification pool type fishway comprises a plurality of continuous chambers which are raised in a ladder mode, and a rectification board provided with a plurality of flow holes arranged above and below and left and right is arranged between every two adjacent chambers. The fishway suitable for fishes having small sizes and poor swimming capability is a pool type fishway making use of the hydraulics rectification and energy dissipation principle of the rectification boards, the rectification boards can play an obvious role in energy dissipation between the chambers, the definite water flow direction can be formed while energy dissipation is carried out, and therefore the fishes can go upstream in the definite direction when swimming in the fishway and cannot get lost or be trapped in the fishway. The fishway reduces obstruction influence of hydraulic engineering construction on the fishes, fish passing efficiency of the fishway is improved, and the river ecological environment is protected or restored.

Description

technical field [0001] The invention relates to a rectification-type pool-type fishway and a flow state control method, and is a fishway and a flow state control method of the fishway. Background technique [0002] There are various types of fishways such as pool type, vertical slit type, baffle type, simple type, fish ladder and fish gate, etc. Each fishway forms different water flow conditions to adapt to the smooth passage of different fish through water retaining structures such as gate dams . Research and experiments, and the fishways with more successful cases are stepped or pond-type fishways, and the target fish species are salmonids with strong swimming ability such as salmon or trout. For the "four major fish", swordfish, perch, sweetfish, eel, etc., the individuals are small, the ability to overcome the flow velocity is small, and the ability to adapt to complex flow regimes is poor, so there are few studies. In terms of fishway design, the fishway design standa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/08
CPCY02A40/60
Inventor 白音包力皋穆祥鹏吴一红王秀英许凤冉龚丽刘慧郭晓晨崔巍陈兴茹
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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