选取上海市闵行区樱桃河畔具代表性的滨岸带地域,在模拟降雨过程中,设置不同坡度,不同坡长及植被条件下的对比实验.得出最优方案:坡度约为8°±0.5°,被冬青覆盖的河滨带在宽度为4～5m时,对降雨径流的污染削减效果最佳.此时模拟地表径流平均入水质状况为,进水水质:ρ(COD)=154.7 mg/L、ρ(TP)=0.55 mg/L、ρ(NH3-N)=1.19mg/L,出水水质:ρ(COD)=77.38mg/L、ρ(TP)=0.29 mg/L、ρ(NH3-N)=0.69 mg/L;削减率分别为49.98％,47.27％,41.61％.试验结果为提高城市绿地规划与建设的合理性以及城市降雨径流非点源污染的控制提供参考.%Contrast experiments were conducted of different gradients, grade lengths, and vegetation covers during a simulated rainfall process on the bank of the Yingtao River, a typical river bank area, in the Minhang District of Shanghai. The results show that a river bank that has a gradient of 8° ± 0.5°and is covered by Chinese ilex with a grade length of four to five meters has an optimal pollution reduction effect. Meanwhile, the average quality of input water is 154.7 mg/L for COD, 0.55 mg/L for TP, and 1.19 mg/L for NH3-N; and the quality of exported water is 77.38 mg/ L for COD, 0.29 mg/L for TP, and 0.69 mg/L for NH3-N. The reduction rates of COD, TP, and NH3-N are 49.98% , 41.27% , and 41.61% , respectively. This study provides references for rational design and construction of urban public green lands and non-point pollution control of urban rainfall runoff.
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