太湖五里湖非点源污染物的来源与控制对策

Pollution Sources and Control Countermeasures of Non-Point Sources of Wuli Lake, Lake Taihu

  • 摘要: 现场调查显示,五里湖非点源污染物来源于城区道路、居民区、农业和绿化施肥等方面,在降雨时通过河道、湖周散流和大气沉降方式入湖.根据流域环境特点,将五里湖流域划分为西南山地风景旅游管理区,北部新城污染控制区和东南农业、渔业综合整治区3个区域类型,并对各区提出了如下的非点源污染控制对策:西南山地风景旅游管理区需采取陆上植被保护和滨水植被恢复工程;北部新城污染控制区需采取滨水区、河口区、河道区植被恢复工程以及人工湿地工程;东南农业、渔业综合整治区需采取有机农业工程、污水处理工程、植物塘净化工程和河道生态净化工程.

     

    Abstract: Based on field survey,it is identified that the non-point sources of Wuli Lake are from urban roads,residential areas,agriculture,and fertilization of greensward.The pollutants flow into lake through rivers,lakeshore and atmosphere precipitation during raining.According to characteristics of environment,the watershed is divided into 3 pollution control zones: landscape tourism management zone of southwest mountain(A),pollution control zone of north New City Zone(B) and comprehensive improvement zone of southeast agriculture and fishery(C).The pollution control strategies of non-point sources was suggested that the protection of terricolous vegetation and restoration of riparian vegetation was suitable for zone A,the reconstruction of riparian,estuarine and riverway vegetation and the applying of constructed wetlands was suitable for zone B,and the engineering of organic agriculture,sewage treatment,stabilization lagoon and riverway ecological purification was suitable for zone C.

     

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