【摘要】 针对日益严重的城市内涝及降雨径流污染问题,搭建下凹式绿地装置,人工配水模拟地表降雨径流及污染物,通过改变基质种类和结构、不同植被考察下凹式绿地对降雨径流污染物去除效果及对降雨径流的削减效果。结果表明:无植被覆盖情况下,沸石、草炭土分层填装和混合填装处理装置中,4#沸石+土壤混合填装的装置对COD、NH3-N和TP的去除效果最好,分别达到55.61%,99.55%和89.00%;2#沸石+土壤分层装置对径流削减能力最强;种植植被狗牙根和高羊茅后装置对污染物的去除率和径流削减能力明显提升,其中种植高羊茅的装置去除效果较优,对COD、NH3-N和TP的去除率达到66.78%,89.98%和96.92%,径流削减率最高,达到了46.00%。更多还原

【Abstract】 In response to the growing problem of urban flooding and rainfall runoff pollution,construct a concave green space device,artificial water distribution was used to simulate surface rainfall runoff and pollutants.By changing the matrix type,structure and different vegetation to investigate the effect of the concave green space on the removal of rainfall runoff pollutants and the reduction of rainfall runoff.The results showed that soil mixed with the zeolite filling device without vegetation coverage had the best removal effect on COD,NH3-N and TP than soil mixed with peat filling device and soil with zeolite or peat layered filling device,the removal rate were 55.61%,99.55% and 89.00%;The device with soil and zeolite stratification reflected the strongest ability in reducing runoff.The devices with planting Bermudagrass and Tall fescue has significantly improved on the removal rate of pollutants and the ability to reduce runoff,and the Tall fescue was better,of which the removal rates of COD,NH3-N and TP were 66.78%,89.98% and 96.92%,and the runoff was reduced by 46.00%.更多还原