A fishway system for improving the efficiency of benthic fish over a dam

By introducing a Z-shaped flipping plate driven by a flipping motor and an adjustable bottom structure into the fishway system, combined with mechanical and autonomous fish passage modes, the problem of low efficiency of benthic fish crossing the dam was solved, and efficient upstream migration of benthic fish was achieved.

CN120520197BActive Publication Date: 2026-07-21CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
Filing Date
2025-05-07
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing fishway systems are ineffective in improving the efficiency of bottom-dwelling fish crossing dams, especially for fish species with conservation value such as the blue rock catfish and the yellow rock catfish, whose upstream migration efficiency is relatively low.

Method used

A fishway system was designed, including a fishway inlet and outlet, with a Z-shaped flip plate driven by a flip motor and an adjustable bottom structure. By combining mechanical and autonomous fish passage modes, it provides a bottom fish passage adapted to different working conditions, including conventional autonomous and mechanical transfer modes.

Benefits of technology

It enables efficient upstream migration of benthic fish. By switching between mechanical transport and autonomous fish passage modes, it improves the efficiency of benthic fish crossing the dam, especially for fish with weak swimming ability, and adapts to complex water flow environments.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120520197B_ABST
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Abstract

The application provides a fishway system for improving the dam-passing efficiency of benthic fishes, and relates to the technical field of ecological protection of water conservancy and hydropower, which comprises a fishway inlet arranged at the downstream of a dam and a fishway outlet arranged at the upstream of the dam, a plurality of fishway partitions are arranged along the length direction of the fishway side wall in the fishway, vertical joints are arranged between the fishway partitions, adjacent fishway partitions and fishway side walls enclose a plurality of fishway pool rooms, and a bottom structure component is arranged at the bottom of the fishway pool room; the bottom structure component comprises turnover motors arranged at the fishway inlet and the fishway outlet, a track arranged along the length direction of the fishway is arranged between the turnover motors, and a plurality of groups of Z-shaped turnover plates are movably arranged on the track. The application innovates the bottom fish-passing channel which is adapted to the traditional self-mechanical fish-passing mode, and provides the bottom space of the benthic fishes which changes with the switching of the fish-passing mode.
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