Fishway inlet water supplementing system

Abstract

The invention discloses a fishway inlet water supplementing system with good fish inducing effects. The system includes a water supplementing pool; the water supplementing pool is connected to a watersupplementing main pipe; the water supplementing main pipe is connected to at least one water supplementing branched pipe; and the water supplementing branched pipes are connected to multiple water supplementing branch pipes. The system adopts a mode of sectional water supplementing, so that water supplementing on multiple positions of a fishway inlet can be simultaneously performed, and therefore, the water flow velocity of the whole fishway inlet can be simultaneously changed, the water flow states at the fishway inlet cannot be destroyed, the stable water flow states at the fishway inlet can be maintained, fishes can be effectively attracted to enter a fishway, and good fish inducing effects of the fishway inlet can be achieved; the system adopts multiple water supplementing branch pipes to perform water supplementing, so that the flow velocity of the outlet of each water supplementing branch pipe cannot be too large, large influences on the flow velocity of the fishway cannot be caused, and therefore, upward tracing of fish cannot be affected, and obstruction on the upward tracing of the fish can be avoided; and the system is suitable for being popularized and applied in the field of fishways.

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 are working at the same time, the more the water level of the tailrace channel rises. 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 meets the specified requirements. Although the method of concentrated water supply can adjust the flow rate of the water flow at the entrance of the fishway, the flow rate at the outlet of the water supply pipe is relatively high in the way of concentrated water supply, and the flow rate at other locations is relatively small, which can easily cause water flow at the entrance of the fishway. The flow state is turbulent, which cannot effectively attract fish into 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. create obstacles

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