模拟降雨地表径流污染物输移规律试验研究

Research the Law of Surface Transport by Simulated Rainfall

为研究不同雨强情况下,下垫面对降雨地表径流污染物的削减效果,选取水泥土、粘土砖、机瓦3种典型下垫面进行室内模拟试验。试验结果表明:对CODMn、NH4+-N的削减效果依次为机瓦>粘土砖>水泥土;对UV254的削减效果依次为粘土砖>水泥土>机瓦;对TP削减效果依次为水泥土>粘土砖>机瓦。考虑下垫面集流效率与削减能力,此3种下垫面中机瓦最优。

In order to study the underlying surface on reduction effect of pollutants in rainfall runoff in different rainfall intensity.Select the three kinds of typical underlying surface for indoor simulation experiment.The three kinds of underlying surface include cement,brick and tile.The results showed that the order of the reduction effect for CODMn and NH4^＋-N is tile〉 brick 〉cement;reduction effect for UV254 is brick〉cement〉tile,and the reduction effect for TP is cement〉brick〉tile.Consider the collection efficiency and reduction efficiency of underlying surface,tile is the optimal underlying surface in three kinds of underlying surface.