Engineering and Application of Wetland Purification Technology for Surface Source Pollution in Small Towns in Chaohu Lake Basin
Chaohu lake,as one of the"Three Rivers and Three Lakes"in the national water pollution prevention and control program,surface pollution in towns has become an important source of pollution in its watershed.To manage the face source pollution in the towns in the basin and optimize the cost-effectiveness ratio of the project,this paper takes the new artificial wetland in Huailin town as an example,and proposes the combination process of"front ecological pond+surface flow artificial wetland".Through the multi-pond living water chain technology,terrain modification,plant planting,and other engineering measures,to build a rich and diverse water ecosystem.The project constructs an effective wetland area of 22 000 m²,with a daily water treatment capacity of 2 000 m³,and the total amount of COD can be removed up to 16.6 t,NH3-N 2 t and TP 0.64 t per year,which can effectively intercept the first rain,purify the water coming from the upstream of Shizi river,cut down the surface pollution of the township,and improve the quality of the water entering into the Chaohu lake.Realize ecological restoration,water purification,and landscape enhancement of the functional,while cost optimization is effective.
Chaohu lake basinNon-point source pollution controlSurface flow Constructed wetlandEngineering designLandscape
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