上海市文教区屋面径流水质特性研究

在对2003～2006 年上海市文教区屋面径流进行监测的基础上,分析了屋面径流污染物的出流过程,并应用统计分析方法对屋面径流水质及其影响因素进行了探讨.结果表明,屋面径流污染物EMC的对数正态概率分布均呈现出良好的线性分布,说明污染物EMC具有较好的正态分布性;上海市文教区屋面径流污染物COD、SS、BOD5、NH4 -N、TP和TN的EMC中值浓度分别为42.6、76.9、15.2、1.61、0.14和4.8 mg/L;通过聚类分析可知,屋面径流水质整体上受大气沉降等污染物累积效应的影响最大,而受雨水冲刷作用的影响次之.

Characteristics of Urban Roof Runoff in Shanghai Cultural and Educational Area

Based on the monitoring the urban roof runoff quality in Shanghai cultural and educational area during 2003-2006, the variations of pollutants concentrations were analyzed, and then the characteristics of roof runoff quality and the influential factors were studied by statistical methods. From the probability plot of the EMCs, it was showed that all the pollutants concentrations had the good fitness for lognormal distribution. And the EMCs of COD, SS, BOD5, NH4(+)-N, TP, TN for the urban roof runoff in Shanghai cultural and educational area were 42.6 mg/L, 76.9 mg/L, 15.2 mg/L, 1.61 mg/L, 0.14 mg/L, 4.8 mg/L respectively. The roof runoff quality was mainly influenced by dry weather deposits and the washed out effects during rainfalls through the cluster analysis.