不同土壤对下凹式绿地对城市道路中雨水的调蓄拦污效果分析

Analysis of the Effect of Different Soil Types on the Storage and Pollution Control of Urban Road Rainwater in Depressed Green Spaces

本文研究了红壤土、黄棕壤土和黑壤土三组实验装置分别对COD(化学需氧量)、NH4+-N(总氮)、PO43--P(总磷)、和SS(总悬浮物)的去除效果,实验结果表明:红壤土对COD和NH4+-N的处理效果稍优于其他两种土壤,而对于PO43--P的去除,三种土壤之间并没有明显的区别,黄棕壤土对SS去除效果稍高,为88.79%。由此可以得出结论:决定下凹式绿地土壤类型的影响因素并非取决于土壤自身的拦污程度,而是工程施工时土壤取用的便利性和土壤对绿地植物生长的适宜性。

This paper studied the removal effects of three groups of experimental devices made of red soil,yellow-brown soil,and black soil on COD(Chemical oxygen demand),NH4+-N(Total nitrogen),PO43--P(Total phosphorus),and SS(Total suspended solids).The experimental results showed that the treatment effect of red soil on COD and NH4+-N was slightly better than the other two types of soil.However,there was no significant difference among the three soils in the removal of PO43--P.The removal effect of yellow-brown soil on SS was slightly higher,reaching 88.79%.Therefore,it can be concluded that the influencing factors determining the soil type of the concave green space are not solely dependent on the soil's own pollution interception degree,but also on the convenience of soil acquisition during engineering construction and the suitability of the soil for the growth of green space plants.