Hou Pei-Qiang, Ren Yu-Fen, Wang Xiao-Ke, Ouyang Zhi-Yun, Zhou Xiao-Ping
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Huan Jing Ke Xue. 2012 Jan;33(1):71-5.
The natural rainwater and stormwater runoff samples from three underlying surfaces (rooftop, campus road and ring road) were sampled and analyzed from July to October, 2010 in Beijing. Eight rainfall events were collected totally and thirteen water quality parameters were measured in each event. Grey relationship analysis and principal component analysis were applied to assess composite water quality and identify the main pollution sources of stormwater runoff. The results show that the composite water quality of ring road runoff is mostly polluted, and then is rooftop runoff, campus road runoff and rainwater, respectively. The composite water quality of ring road runoff is inferior to V class of surface water, while rooftop runoff, campus road runoff and rainwater are in II class of surface water. The mean concentration of TN and NH4(+)-N in rainwater and runoff is 5.49-11.75 mg x L(-1) and 2.90-5.67 mg x L(-1), respectively, indicating that rainwater and runoff are polluted by nitrogen (N). Two potential pollution sources are identified in ring road runoff: (1) P, SS and organic pollutant are possibly related to debris which is from vehicle tyre and material of ring road; (2) N and dissolved metal have relations with automobile exhaust emissions and bulk deposition.
2010年7月至10月期间，在北京采集并分析了来自三种下垫面（屋顶、校园道路和环路）的天然雨水和雨水径流样本。共收集了8场降雨事件，每场事件测量了13个水质参数。应用灰色关联分析和主成分分析来评估综合水质并识别雨水径流的主要污染源。结果表明，环路径流的综合水质污染最严重，其次分别是屋顶径流、校园道路径流和雨水。环路径流的综合水质劣于地表水Ⅴ类，而屋顶径流、校园道路径流和雨水属于地表水Ⅱ类。雨水和径流中TN和NH₄⁺-N的平均浓度分别为5.49 - 11.75 mg·L⁻¹和2.90 - 5.67 mg·L⁻¹，表明雨水和径流受到氮（N）污染。在环路径流中识别出两个潜在污染源：（1）P、SS和有机污染物可能与来自车辆轮胎和环路材料的碎屑有关；（2）N和溶解金属与汽车尾气排放和大气沉降有关。
