生态绿地控制初期雨水径流污染的研究  

Treatment of Initial Rainwater Runoff Pollutants by Ecological Vegetation

作　　者：王宝山[1] 黄廷林[1] 聂小保[1] 柴蓓蓓[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2010年第3期11-13,17,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07317-004);教育部创新团队项目(IRT0853)

摘　　要：研究了生态绿地对初期雨水径流污染物的控制效果。生态绿地通过滤层过滤、植物吸收和生物降解的多重作用,实现了对SS、TN和TP的高效去除,而过滤介质和植物根系的缓冲作用,使得对CODMn保持了比较稳定的去除效果。生态绿地通过对初期高污染的雨水径流进行收集及后期洁净雨水的溢流实现了对雨水径流污染物的高效控制,对每场降雨中CODMn、TP、TN和SS的平均控制量分别为41.0、0.697、24.5和239mg/m2。生态绿地收集的雨水通过毛细作用到达表层土壤,提高了土壤的含水率,供给植物生长需求,对降雨量的利用率可达20%。生态绿地在有效控制雨水径流污染物的同时,还实现了对雨水的高效利用,可广泛应用于雨水径流面源污染的控制。Ecological vegetation system was built and applied to treat initial rainwater runoff pollutants. The effective removal of suspended solids, total nitrogen and total phosphorus from rainwater is realized by filtration, vegetation absorption and biological degradation. Moreover, the stable removal efficiency of CODMn is kept by buffer action of filtering media and root system of vegetation. The efficient control of rainwater runoff pollutants is achieved by harvesting initial highly-polluted rainwater runoff and overflowing later clean rainwater runoff. The average treatment rates of CODMn, total phosphorus, total nitrogen and suspended solids are 41.0 mg/m^2, 0.697 mg/m^2, ：24.5 mg/m^2 and 239 mg/m^2 respectively. The harvested rainwater reaches soil surface through capillary action, which increases water content in soil for vegetation growth, and about 20% precipitation can be used. The ecological vegetation system can effectively remove pollutants from rainwater runoff and accomplish efficient utilization of rainwater, and it can be used to control non-point source pollution of rainwater runoff.

关 键 词：生态绿地 雨水径流 面源污染 雨水利用 

分 类 号：X52[环境科学与工程—环境工程]