LIU Lu;LI Ji-ming;KE Fan;Geological Environment Exploration Institute of Jiangsu Province;Luanhe-Tianjin Aqueduct Management Office;State Key Laboratory of Lakes and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences;

LIU Lu%LI Ji-ming%KE Fan%Geological Environment Exploration Institute of Jiangsu Province%Luanhe-Tianjin Aqueduct Management Office%State Key Laboratory of Lakes and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences

Lakeshore Raised Constructed Wetlands(LRCW);;Fuxian Lake;;Agricultural non-point source pollution;;Purification effect

[Objective]The research aimed to study the water quality purification effect of the wetland on the agricultural non-point source polluted river water. [Method] Based on the agricultural non-point source polluted river water of the Guangnanyinggou and Shapen river which on the north shore of the Lake Fuxian. The river was characterized by high flow rate and low pollutant concentration. We constructed Lakeshore Raised Constructed Wetlands in lakeside of Lake Fuxian. The process route was designed with the sedimentation tanks,a second surface flow wetland and gravel bed wetland. [Result] The average removal rate of SS,CODCr,TN and TP was 90%,54%,50% and 66% respectively. When the designed hydraulic load was 0. 47 m~3(/m~2·d),the best purification effect was achieved. The sand silting area of the process could effectively reduce the content of SS,reduce the pressure of the subsequent wetland system treatment,and prevent the plugging of the filler. The secondary surface flow-gravel bed wetland has a good effect of nitrogen and phosphorus removal,effectively reducing the pollution load into the lake.[Conclusion] Lakeshore Raised Constructed Wetlands can be applied to the agricultural non-point source polluted river water. It has good economic,environmental and ecological benefits.