A construction method for biofiltration slope protection for river restoration

Abstract

The invention discloses a biological filtration protection slope for riverway ecological remediation and a construction method of the biological filtration protection slope. With the trapezoidal riverway section as the basis, the biological filtration protection slope is composed of a water interception and water distribution system and a biological filtration wetland from upstream to downstream.The water interception and water distribution system is arranged on the upstream portion of a riverway. The water level of the riverway is lifted through a rubber dam, a water distribution well systemconveys river water to the biological filtration wetland of the riverway protection slope through perforated water distribution pipes, and each water distribution well corresponds to a biological filtration band. The perforated water distribution pipes achieve even water drainage along the biological filtration bands, the river water sequentially passes through biological filtration layers, transition layers and water drainage layers of the biological filtration bands, and finally the treated river water is drained out of the system through water drainage of perforated water drainage pipes and is drained into the riverway again. The biological filtration protection slope has the function of purifying polluted river water, operation is achieved under the unpowered condition, the system canfreely set the number of the in-pressure water distribution wells and the number of the biological filtration bands according to the terrain of the riverway, setting is flexible, normal flow drainageof the riverway is not influenced, and the function of urban landscape is achieved.

Description

technical field [0001] The invention belongs to the technical field of river water purification and ecological restoration, and in particular relates to a biological filtration slope protection for river ecological restoration and a construction method thereof. Background technique [0002] At present, my country is facing serious problems of water resource shortage and water environment deterioration, especially the pollution of rivers flowing through cities. Most of the rivers flowing through cities in my country are responsible for urban sewage and flood discharge. A large amount of biological sewage, industrial waste water and rainwater containing pollutants are discharged into the river, causing the ecological deterioration of the river water body and forming a black and smelly river. Threats to health and quality of life have become a persistent problem that cannot be solved in urban environmental protection work, so it is extremely urgent to restore the ecology of the ...

AI Technical Summary

Problems solved by technology

[0006] 3) Insufficient dissolved oxygen in the water body, resulting in anoxic state

The physical method is to build an artificial filter bed. It is necessary to lift the water in the river to the artificial filter bed on the bank slope, which not only occupies a large amount of urban land, but also consumes a lot of electricity for water extraction.

The chemical method puts chemical reagents into the river, which may cause secondary pollution to the river, and the construction of artificial wetlands in the river will affect the discharge of river water, and the plants and biological filter layers are easily destroyed during the flood season, and the river water filtration effect is not as good as offline good handling

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