高位湖滩湿地在农业面源污染河水中的应用  

The Application of Lakeshore Raised Constructed Wetlands in Agricultural Non-point Source Polluted River Water

作　　者：刘璐 李继明[2] 柯凡[3] 李文朝[3] 侯长定 LIU Lu;LI Ji-ming;KE Fan(Geological Environment Exploration Institute of Jiangsu Provinc;Luanhe-Tianjin Aqueduct Management Offic;State Key Laboratory of Lakes and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing,Jiansu 21000)

机构地区：[1]江苏省地质环境勘查院,江苏南京210012 [2]天津市引滦工程管理处,天津301900 [3]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,江苏南京210008 [4]玉溪市环境科学研究所,云南玉溪653100

出　　处：《安徽农业科学》2018年第19期83-87,共5页Journal of Anhui Agricultural Sciences

基　　金：国家"十三.五"水体污染控制与治理科技重大专项(2017ZX07603-004-02)

摘　　要：[目的]研究高位湖滩湿地对农业面源污染河水的净化效果。[方法]根据抚仙湖北岸受农业面源污染入湖河流广南营沟、沙盆河水流量大、污染物浓度较低的特点,在河口区湖滩地采用拦污沉沙—二级表流湿地—砂砾床工艺路线设计了高位湖滩湿地,通过对湿地进水量、进出水质周年监测与分析。[结果]该系统对SS、CODCr、TN、TP平均去除率分别为90%、54%、50%、66%,设计水力负荷为0.47 m^3/(m^2·d)时,净化效果最佳。该工艺拦污沉沙区域,可以有效降低SS的含量,减轻后续湿地系统处理的压力,防止填料堵塞;二级表流—砂砾床湿地,脱氮除磷效果较好,有效削减入湖污染负荷量。[结论]该湿地系统适用于农业面源污染河水,具有良好的经济、环境、生态效益。[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.

关 键 词：高位湖滩湿地 抚仙湖 农业面源污染 净化效果 

分 类 号：S181[农业科学—农业基础科学]