Large medium river course compound platform surface source control and purification system

Abstract

The invention relates to a source retention and purification system for a composite flat table top of a large and intermediate riverway, wherein, an interception cross trench the cross section of which is a trapezoid wide on the upper part and narrow on the lower part is arranged on a joint of a riverway slope and a composite platform; gravels with different grain diameters are filled into the composite platform layer by layer from far to near according to the distance with the middle of a river to respectively form a round gravel layer, a mediate gravel layer and a fragmental gravel layer; concrete bricks are laid on the top of the composite platform; one side of the composite platform on the waterfront is provided with a slope waterfront; nonfines concrete blocks are laid on the slope waterfront; and planting is performed on the slope waterfront in turn according to the depth and the height of the water to form a submerged plant community, a floating plant community and an emersed plant community. The source retention and purification system has the advantages that: rainfall runoff surface source pollutants can be retained and purified through the action of the interception cross trench, herbal plants, the gravel layers and aquatic plants on the waterfront of the composite platform, thereby a suitable living environment is created and the integration of the paddling amusement function, the flood carrying function, the surface source retention and purification function and the ecological function of a composite riverbed of the large and intermediate riverway is realized. Moreover, the source retention and purification system has the advantages of simple structure, convenient construction, stable function, low cost and convenient use.

Description

technical field [0001] The invention relates to a technical method for ecological restoration of rivers and interception and purification of non-point source pollution, in particular, it is beneficial to transform the compound platform of large and medium-sized rivers with an ecological method, so that it can meet the requirements of water-friendly entertainment and flood discharge, and at the same time have non-point source interception , water purification and ecological habitat multifunctional technical method. The invention belongs to the technical field of river ecological restoration. Background technique [0002] At present, the compound riverbed of large and medium-sized rivers is usually composed of slopes, compound platforms, vertical revetments, and river channels. Under normal circumstances, the river flows in the river channel, and the platform can be used by passers-by to fully enjoy the pleasure of being close to the water; when the flood comes, the river wat...

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Problems solved by technology

[0003] However, this kind of compound riverbed still has certain defects, which are mainly manifested in the following aspects: (1) As point source pollution is increasingly controlled, non-point source pollution has become an important form of pollution affecting river water quality. However, the design of the above-mentioned compound riverbed does not consider Non-point source interception and purification function, so the interception and purification effect on non-point source pollution is very limited, causing non-point source pollutants to directly enter the river water body, causing great pollution to the river water quality; (2) The waterfront side of the platform of the above-mentioned compound riverbed adopts vertical revetment forms, which are not conducive to the habitat and growth of aquatic organisms, and will have adverse effects on the health of river ecosystems

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