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Water-permeable fishway

A fishway and fish technology, applied in water conservancy projects, sea area engineering, climate change adaptation, etc., can solve problems such as complex flow regimes, achieve good water flow conditions, improve fishway bottom slopes, and have good application prospects

Inactive Publication Date: 2012-10-31
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the energy dissipation effect of the vertical slit type is relatively sufficient, and this form is widely used in foreign countries, but its flow state is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment is a permeable fishway with a structure such as figure 1 with figure 2 As shown, the fishway pond chamber 1 is included, and a plurality of partitions 2 arranged on the inner side wall 6 of the fishway pond chamber 1 are arranged at the other inner side of the fishway pond chamber 1 with a certain distance between each partition plate 2 A plurality of diversion vertical walls 3 on the wall 7, each diversion vertical wall 3 and the partition plate 2 are misplaced, and a fish hole 4 is formed between each corresponding diversion vertical wall 3 and the partition plate 2, and the partition plate 2 is provided with permeable perforation or seam 5. The permeable perforations or slits 5 are arranged in an array on the separator 2 . Water-permeable perforation or seam 5 can permeate water, but can not pass fish. Partition 2 is partially permeable or completely permeable.

[0031] Part of the water flow from the upper-level fishway pond chamber enters the ...

Embodiment 2

[0033] This embodiment is a permeable fishway with a structure such as image 3 As shown, the fishway pond chamber 1 is included, and a plurality of partitions 2 arranged on the inner side wall 6 of the fishway pond chamber 1 are arranged at the other inner side of the fishway pond chamber 1 with a certain distance between each partition plate 2 A plurality of diversion vertical walls 3 on the wall 7, each diversion vertical wall 3 and the partition plate 2 are misplaced, and a fish hole 4 is formed between each corresponding diversion vertical wall 3 and the partition plate 2, and the partition plate 2 is a double-layer structure, forming a double-layer permeable structure. There is a space between the two layers of partitions. One end of the two layers of partitions is connected, and the other end is fixed on the inner wall of the fishway pond chamber 1, forming a back-shaped structure. Water-permeable perforations or seams 5 are all arranged on the two-layer dividing plate....

Embodiment 3

[0036] This embodiment is a kind of permeable fishway. This embodiment is modified on the basis of Embodiment 1. The structure is as follows Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the permeable fishway partitions 2 of this embodiment are arranged staggeredly on the inner side wall 6 and the inner side wall 7 of the pool chamber 1, and the diversion vertical wall 3 is arranged on the pair of partitions 2 The side and inner side walls, and the diversion vertical wall 3 is distributed between two adjacent partitions 2, and a fish hole 4 is formed between each diversion vertical wall 3 and its adjacent partition 2.

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Abstract

The invention belongs to the technical field of catadromous fish cross-dam protection, and in particular relates to a water-permeable fishway applied to an environment with a larger water head difference and a larger slope. The water-permeable fishway comprises a fishway pool chamber, a plurality of partition plates arranged on one inside wall of the fishway pool chamber, and a plurality of water diversion vertical walls on the other inside wall of the fishway pool chamber, wherein a certain distance is reserved between every two partition plates; the water diversion vertical walls and the partition plates are arranged in a staggered manner; fish through holes or seams are formed between the water diversion vertical walls and the partition plates which correspond to one another; water-permeable holes or seams are formed on the partition plates; and water can permeate through the water-permeable holes or seams, but fish cannot pass through the water-permeable holes or seams. According to the water-permeable fishway disclosed by the invention, the energy dissipation effect is improved by 10-20% in comparison with the traditional partition plates, so that the problem that the fishway cannot be adapted to the environment with the larger water head difference, the larger slope and a bad flow condition is solved, therefore the slope of the bottom slope of the fishway is increased, the length of the fishway is shortened, and the project investment is lowered.

Description

technical field [0001] The invention belongs to the technical field of protection for migratory fish crossing dams, and relates to a fishway, in particular to a permeable fishway suitable for large water head difference and steep slope. Background technique [0002] A fishway is a channel set up in a fixed river structure (such as a dam) that allows migratory aquatic organisms to pass countercurrently or downstream. At present, fishways are divided into original ecological fishways, trough fishways, special structural fishways, and pool chamber fishways (also known as clapboard fishways) according to their structural types. When the original ecological fishway is very close to the natural river, it mainly relies on extending the water flow path and increasing the roughness to dissipate energy, which is especially suitable for low weirs or pivots with low water head; the trough fishway is mainly arranged on the groove wall and bottom All kinds of blocking boards and ridges w...

Claims

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Application Information

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IPC IPC(8): E02B8/08
CPCY02A40/60
Inventor 李中华胡亚安宣国祥黄岳郭超薛淑
Owner NANJING HYDRAULIC RES INST
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