Low-water-head dam fishway with function of ecological flow discharge

Abstract

The invention provides a low-water-head dam fishway with the function of ecological flow discharge. The low-water-head dam fishway is arranged on the side away from a water guide gate and comprises anupstream water inlet segment, a fishway and a water supplementary channel. The fishway and the water supplementary channel are arranged on the upstream portion and the downstream portion side by side. The upstream water inlet segment is connected with the fishway and the water supplementary channel on the upstream portion and is movably connected with a fish guide grid. The fishway is a slope segment and is sequentially provided with a first upstream gate, multiple partition plates and a first downstream gate. The water supplementary channel is a slope segment, multiple water supplementary pipes are arranged between the water supplementary channel and the fishway on the downstream portion, and water supplementary pipe gates are arranged in the water supplementary pipes. A second upstreamgate, a water supplementary pipe gate control mechanism, a fish pound and a second downstream gate are arranged in the water supplementary channel. The water supplementary pipe gate control mechanismis used for controlling the opening degree of the water supplementary pipe gates. The low-water-head dam fishway has the beneficial effects that the ecological flow discharge measure and a fish passing building are combined perfectly, and the functionality of fishway engineering is further improved.

Description

technical field [0001] The invention belongs to the technical field of river connectivity restoration engineering, and in particular relates to a low-head dam fishway with the function of releasing ecological flow. Background technique [0002] Under the environment of green hydropower and ecological hydropower, taking certain ecological compensation measures to alleviate the adverse effects of hydropower project construction has become the standard configuration of current hydropower project construction. To restore river connectivity, fishway engineering is widely used. At present, the negative ecological impact brought by large-scale hydropower has attracted much attention, and fishway engineering is given priority to large-scale hydropower stations with a certain scale. This type of hydropower station is basically not a diversion-type power station. The downstream of the dam has a stable discharge flow, which is sufficient to ensure sufficient river flow. Fish can often...

AI Technical Summary

Problems solved by technology

Different from large-scale hydropower stations, small hydropower stations are usually diversion-type power stations. The upstream flow is basically used for power generation of the power station. The discharge of ecological flow at the dam site is seriously insufficient or there is no way to discharge ecological flow. There is a long distance between the barrage and the tail water of the diversion-type power station reduced water reaches, creating new obstacles for upstream fish

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