基于雨型的南方城市道路降雨径流污染负荷分析

Analysis of road runoff pollution load at Southern City based on the type of rainfall

为研究南方道路降雨径流污染负荷,分析对比了重庆市和苏州市4场典型降雨过程中污染物浓度及污染负荷的变化。结果表明:雨型是污染负荷分布的重要影响因素,Ⅱ型降雨的污染负荷变化相对Ⅶ型降雨与径流量(或降雨强度)变化更为相似;污染物浓度与污染负荷的相关性差,径流量(或降雨量强度)与SS/TSS、TP、Pb的污染负荷存在明显相关性。南方城市道路径流污染控制在截留高浓度的初期雨水的同时,也应从污染负荷方面进行总量控制。

To study road rain runoff pollution load in south china,the changes of pollutant concentration and pollution load during four typical rainfalls at Chongqing and Suzhou were compared and analyzed. The results showed that the rain type was a important influence factor of the distribution of pollution load. The runoff or rainfall change tendency of Ⅶ type rainfall was similar with pollution load of II type rainfall. The correlation of pollutants concentration and pollution load was not good. There was obviously correlation between the runoff（ or rainfall） and pollution loads of SS/TSS,TP and Pb. The runoff pollution control of southern urban road should also control the pollutants total quantity while intercepting high concentration initial rain.