Trench type fish collection front room suitable for different water depth variation amplitudes of high-head dam

Abstract

The invention discloses a trench type fish collection front room suitable for different water depth variation amplitudes of a high-head dam and belongs to the field of water conservancy facilities. The trench type fish collection front room comprises a fish collecting and luring system and a water supply system, wherein the fish collecting and luring system mainly comprises a long bottom plate anda sloped bottom plate, a fish-collecting transition section, two fish-collecting retaining walls, two energy dissipation gratings, a break joint type control gate, a fish collection tank and a fish collection inlet; the water supply system comprises a power station tail water outlet counter-slope, a water supply open channel section, a water supply closed conduit section, a water supply outlet section and a fish collection outlet. During the operation of the trench type fish collection front room disclosed by the invention, power station tail water flow serves as fish-luring water flow and water supply flow, the flow and the flow velocity of the fish collection front room are controlled by adjusting relative positions of two rows of vertically arranged cross joints of a cross joint type control gate, fishes are lured to enter the fish collection tank of the fish collection front room, the fish collecting and luring effects are obvious and high-efficiency, and the fish collection frontroom has the advantage of being adaptive to great water level variation amplitude and is suitable for popularization and application in water conservancy projects.

Description

technical field [0001] The invention relates to a fish-passing facility technology in water conservancy and hydropower projects, in particular to a trough-type fish-collecting antechamber adapted to varying water depths of high head dams, and belongs to the technical field of water conservancy and hydropower projects. Background technique [0002] During the construction of water conservancy and hydropower projects, the complete river ecosystem is often divided, which blocks the migration channels of migratory fish. As a result, the genes of fish under the dam and above the dam cannot be exchanged normally, and the vitality of species may decrease. Changes in the environment and habitat will also occur, and these changes will lead to the deterioration of the ecological environment of the watershed and the fragmentation effect of the river ecosystem. The deterioration of the ecological environment of the river basin and the discontinuity of the river ecosystem have attracted ...

AI Technical Summary

Problems solved by technology

Among the currently commonly used fish-trapping facilities, the technology of the fish-collecting platform is not mature enough, and the fish-collecting boats and fishing tools are more harmful to fish

The relatively mature fish collection and luring facility is the fishway fish collection system, but it has the following disadvantages: In terms of fish luring effect, the fishway inlet position of the fishway fish collection system is often affected by the overall layout of the project

On the one hand, due to the complex flow state near the entrance of the fishway, it is difficult for fish to find the entrance of the fishway, and the effect of luring fish is not good; , not only occupies the power generation flow, but also affects economic benefits

In terms of the fishway entrance arrangement, fish begin to migrate and spawn during the fish passing season. In order to adapt to changes in the water level of the downstream river and ensure the minimum operating water level of the fishway entrance, it is necessary to set up multiple fishway entrances, and the construction is relatively complicated; In terms of nature, for different fish passing objects, the corresponding internal structure of the fishway is quite different, such as clapboards and guide angles, etc.; and it is not easy to adjust after completion. The fishway-type fish collection system is not easy to promote

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