Water complementing system for fish-way entrance

Abstract

The invention discloses a water complementing system for a fish-way entrance, which has good fish attracting effects. The water complementing system comprises a water complementing pool, wherein a water completing header tube is connected on the water complementing pool; at least one water complementing sub tube is connected on the water complementing header tube; a plurality of water complementing branch tubes are connected on the water complementing sub tube. The water complementing system adopts a sectional water complementing manner to simultaneously complement water for a plurality of positions of the fish-way entrance, so that water flow speed of the whole fish-way entrance is simultaneously changed without destroying the flow regime at the fish-way entrance, the flow regime at the fish-way entrance is kept to be stable to effectively attract fishes to enter the fish-way, thereby achieving good fish attracting effects; moreover, a plurality of water complementing branch tubes are adopted to complement water, and flow speed at the exit of each water complementing branch tube is not too large, so that large interferences cannot be caused to the flow speed of the fish-way, the tracing of fishes is not affected and is not blocked. The water complementing system is suitable for popularization and application in the fish-way field.

Description

technical field [0001] The invention relates to the field of fishways, in particular to a fishway inlet water supply system. Background technique [0002] With the overall development of my country's economy and society, people realize that hydropower generation has brought economic benefits and at the same time has formed a barrier to fish germplasm exchange channels, resulting in habitat fragmentation. With the continuous improvement of environmental protection policies and the continuous increase of environmental supervision of construction projects, the construction of fishways to provide fish with artificial water tanks that migrate through sluices or dams has attracted much attention. [0003] The design of the fishway mainly considers the upstream habit of the fish. In the downstream of the gate and dam, the fish rely on the attraction of the water flow to enter the fishway. The fishway goes downstream. In order to attract fish to enter the fishway, induction facilit...

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Problems solved by technology

[0003] The design of the fishway mainly considers the upstream habit of the fish. In the downstream of the gate and dam, the fish rely on the attraction of the water flow to enter the fishway. The fishway goes downstream. In order to attract fish to enter the fishway, induction facilities are usually installed at the entrance of the fishway. Generally, the induction facilities used include fish dams (weirs), nets, electric grids, water flow induction, etc. Among them, the water flow Induction is the most commonly used method. The water flow induction refers to controlling the flow rate of the water flow at the inlet of the fishway so that the flow rate reaches a suitable range, thereby attracting fish to enter the fishway. However, when the generator set is working, the fish will The water level of the tailrace channel at the entrance of the fishway increases, and the more generators work at the same time, the more the water level of the tailrace channel rises. The increase in the water level of the tailrace channel will reduce the water flow rate at the entrance of the fishway, which cannot Attract fish to enter the fishway. Therefore, in order to improve the effect of luring fish, it is usually necessary to replenish water at the entrance of the fishway so that the water flow rate at the entrance of the fishway can meet the specified requirements. Although the method of concentrated water replenishment can adjust the water flow velocity at the entrance of the fishway, the flow velocity at the outlet of the water replenishment pipe is relatively high in the way of centralized water replenishment, and the flow velocity at other locations is relatively small, which can easily cause water flow at the entrance of the fishway. The flow state is disordered, which cannot effectively attract fish to enter the fishway. The fishway entrance has a poor fish luring effect, and concentrated water replenishment will make the flow rate of the local pool section of the fishway too slow, which will affect the upward movement of fish and affect the upward movement of fish. create obstacles

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