Fish collecting system and fish collecting method for collecting fish by utilizing tail water of hydropower station

Abstract

The invention discloses a fish collecting system and a fish collecting method for collecting fish by utilizing tail water of a hydropower station. The problem of dam-passing transfer of fish in a high dam project in a high-intensity alpine and valley region is solved and the fish collecting efficiency is improved. The fish collecting system comprises a fish collecting building, a top fish collecting platform, diversion piers and a backfilled tower back, the fish collecting building is divided into an upper part and a lower part, the boundary elevation is not lower than the highest tail water level, the upper part is a closed tower system consisting of connecting walls and supporting columns, the lower part is a fish passing channel consisting of the connecting walls, the supporting columns and internal transition sections, steel plates are embedded in the left and right contacting walls to install fish collecting box guide rails, the upstream and downstream diversion piers are asymmetrically designed, the tail water flow state is improved to enhance the fish luring effect, the backfilled tower back is connected to an upper structure through joint bars and extends to the top to serve as a traffic bridge, a top platform expands platform space through brackets, and a machine room is started and stopped to start and stop the fish collecting device. According to the fish collecting system and fish collecting method for collecting the fish by utilizing the tail water of the hydropower station, the fish collecting method can be used for a tail water outlet of the hydropower station and has the advantages of being safe, reliable, feasible in technology and convenient and fast to construct.

Description

technical field [0001] The invention relates to a fish collection system and a fish collection method using the tail water of a hydropower station, and belongs to the technical field of water conservancy and hydropower engineering. Background technique [0002] As a renewable clean energy, hydropower has many advantages such as no pollution, low operating cost, and convenient power peak regulation. In recent years, my country has developed and constructed a large number of water conservancy and hydropower projects. , the inevitable impact on the ecological environment cannot be ignored, especially it destroys the connectivity of the river, blocks the migration channel of fish, and has a great impact on the migration and reproduction of migratory fish. [0003] At present, at home and abroad, the method of building various fish passing facilities is mainly used to reduce the impact of engineering construction on the obstruction of migration channels, such as fishways, fish loc...

AI Technical Summary

Problems solved by technology

Among them, the main disadvantage of the fishway is that it is not suitable for high water head dams, and it needs to be combined with the layout of the power station hub, which has a certain impact on the construction and operation of the main project. According to the data analysis, the fishway at home and abroad has not achieved the desired effect.

Fish locks and fish elevators have the disadvantages of large construction investment, difficulty in design and construction, and high maintenance costs, and their application is restricted by many factors

The above-mentioned facilities are generally arranged on the shore or at a certain position in the dam, but because the discharge flow is far lower than the tail water flow of power generation, fish are often attracted by the tail water of power generation, and finally gather near the tail water, resulting in excessive Inefficient collection of fish by fish facilities

Some fish-passing facilities improve the efficiency of fish collection by increasing the flow of fish luring by using water pumps. However, the flow of water is limited, and the effect is not obvious. In addition, water replenishment will increase or decrease energy consumption and consume flow, which has a great impact on the power generation efficiency of the project.

In addition, large-scale water conservancy and hydropower projects are often located in mountainous and canyon areas, where the water flow is turbulent, the flow regime is complex, and the topography of the river bank and the bottom of the river changes drastically.

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