摘要
在对湖南省长潭西高速公路关键地段(学士收费站和服务区加油站)降雨径流水质进行监测的基础上,分析了高速公路路面径流污染物特征,探讨了各污染物的初期冲刷效应和各污染因子间的相关性。结果表明,收费站路面径流样品中的COD和SS平均浓度分别为70 585 mg/L,而服务区加油站样品的COD和SS平均浓度分别为120 357 mg/L。受汇水面积差异的影响,收费站处的径流污染物未发生初期冲刷现象,而加油站的径流污染物均产生初期冲刷效应,以COD最为明显,20%的径流量携带的COD含量接近50%。2个地段的各污染物之间相关性处于显著水平以上,SS与其他污染物的相关系数均大于0.7。
Road runoff samples during a rainfall were collected at two typical sites (a toll gate and a gas station) of the Changsha-Xiangtan Freeway, and were analyzed to determine contamination level of pollutants including COD, SS, TN, TP, pH and heavy metals such as Cu, Zn, Pb and Cd . Phenomena of the first flush effects (FFE) were studied for the different sites focusing on the co-relation between FFE and the pollutants. Findings of the study were that FFE differed at two sites depending on the area of catchment related; there were significant linear relations among the pollutant parameters in the runoff water, and in particular, correlation coefficient between SS and other parameters was greater than 0.7.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第6期134-137,共4页
Environmental Science & Technology
基金
湖南省交通科技项目(200811)