Seepage-proofing step-deep pool system for repairing water reducing and dehydrating river channel in mountainous area

Abstract

The invention discloses a seepage-proofing step-deep pool system for repairing a water reducing and dehydrating river channel in a mountainous area. The whole seepage-proofing step-deep pool system isin a pitted shape, deep pools with seepage-proofing performance and steps with water retaining performance are arranged in the water reducing and dehydrating river channel in the mountainous area, the steps are formed by stacking stones of different sizes in a nested mode at the edges of the deep pools, the deep pools are composed of pit bottom sand pebble, supporting base small gravel, supporting base fine sand, seepage-proofing layers, mat layer coarse sand and surface sand pebble from bottom to top in sequence, and the depth of pool pits is 0.5-2m. According to the seepage-proofing step-deep pool system for repairing the water reducing and dehydrating river channel in the mountainous area, by constructing the step-deep pool system with seepage-proofing and water storage performance ona sandy pebble riverbed, a basic emergency shelter can be provided for fish and other aquatic organisms in the water reducing and dehydrating river channel in the mountainous area, and the ecologicalwater demand of the river channel is met. The seepage-proofing step-deep pool system is simple in design and easy to construct, the layout form and quantity are applied to local conditions without operating cost, and the seepage-proofing step-deep pool system is applied to ecological restoration of water reducing and dehydrating river channels of small hydropower stations in mountainous areas withabundant rainfall, and is further applied to ecological control of downstream river channels of dam (sluice) with low rainfall but certain discharge flow at regular intervals.

Description

technical field [0001] The invention relates to the technical field of river ecological restoration, in particular to an anti-seepage ladder-deep pool system used for restoration of dewatered river courses in mountainous areas. Background technique [0002] Restricted by various factors in history (including policy, planning, design, capital, technical level, etc.), some small hydropower projects that were developed and built in my country in the early stage and are still in operation today, especially diversion-type power stations, have caused problems in the river channel under the dam (sluice). The amount of water is reduced or cut off compared with natural conditions. Existing studies have shown that the generation of dewatered river sections destroys the connectivity of rivers, affects the ecological water use of downstream rivers, and causes great damage to aquatic organisms and their habitats. Ecosystem deterioration. In the past period of time, because small hydropo...

AI Technical Summary

Problems solved by technology

Therefore, if the problem of seepage in the sandy river bed is not solved, it will be difficult to store a small amount of river water retained in the dewatered channel, and the basic living space or shelter necessary for aquatic organisms will not be maintained.

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