A Flood Terrace Constructed Wetland System for Reducing River Surface Source Pollution

Abstract

The invention provides a river beach platform artificial wetland system for reducing river surface source pollution, which belongs to the field of water pollution control and treatment. Specifically, it includes the grass-planting ditch, overflow well, water distribution channel, ecological detention pond, two wetland treatment units, water collection channels and emptying drainage channels; the grass-planting ditch is used to collect sewage polluted by non-point sources, and is connected to the overflow well through drainage pipes. The overflow well is connected to the water distribution channel through the connecting pipe, and the water distribution channel distributes water to the ecological detention pond through the water distribution pipeline. , water distribution channels, ecological detention ponds, first-level platform wetland treatment units, second-level platform wetland treatment units and water collection channels can all be emptied into empty drains. This system enables non-point source sewage to be effectively collected, filtered and purified, and can ensure the quality of the water entering the river.

Description

technical field [0001] The invention relates to the field of water pollution control and treatment, in particular to a river beach platform artificial wetland system for reducing pollution from river surface sources. Background technique [0002] The management of non-point source polluted rivers is one of the hot spots in the field of comprehensive water environment management. The main sources of non-point source pollutants include agricultural and rural non-point source pollution, rainwater runoff, and dry and wet deposition. Among them, agricultural and rural non-point source pollutants mainly come from aquaculture, planting and rural domestic sewage. Rainwater runoff pollutants are divided into initial rainwater in rainwater pipe network and initial rain runoff in areas without rainwater pipe network according to whether there is rainwater pipe network. In addition, wet and dry deposition pollutants directly entering river water bodies are also included. [0003] The...

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Problems solved by technology

[0005] (1) Farmland surface runoff, farmland drainage and underground seepage are not easy to collect into constructed wetlands, and after purification and reduction, they directly enter the water body to form non-point source pollution;

[0006] (2) When the concentration of pollutants in rainwater runoff is high, silt and clogging will occur in traditional constructed wetlands, which will reduce hydraulic conductivity, wetland treatment effect and operating life;

[0007] (3) In rainy weather, the initial rainwater and other rainwater with better water quality pass through the traditional artificial wetland without considering the overflow condition, resulting in a large processing load

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