屋面径流污染特性及回用分析  

Runoff Pollution Characteristics of SBS Roof

作　　者：高玉婵 金星龙[1] 赵乐军 宋现才 GAO Yu-chan;JIN Xing-long;ZHAO Le-jun;SONG Xian-cai(College of Environment Science and Safety Engineering,Tianjin University of Technology, Tianjin 300000, China;Tianjin Municipal Engineering Design and Research Institute, Tianjin 300392,China)

机构地区：[1]天津理工大学环境科学与安全工程学院,天津300000 [2]天津市市政工程研究院,天津300392

出　　处：《中国农村水利水电》2019年第10期38-41,46,共5页China Rural Water and Hydropower

基　　金：天津市技术创新引导专项项目(16YDLJSF00030);天津市高等学校创新团队项目(TD13-5021)

摘　　要：以天津市某大学SBS(改性沥青)屋面为研究对象,2018年8-9月考察了3次典型降雨事件中屋面径流中污染物随降雨历时的出流规律和影响因素、各降雨事件的事件平均浓度(EMC)以及初始冲洗效果强度。研究表明,初期径流水质较差,污染较严重,随时间的延长,各污染物质量浓度逐渐降低并趋于平稳,且降雨量越大、屋面污染总负荷越高,雨水对屋面的冲刷作用越强,降低趋势和初始冲洗效果越显著;结合各污染物EMC分析可知,3次降雨事件中COD污染最严重,均超出了《地表水环境质量标准》Ⅴ类标准,TP污染较轻,最小质量浓度可达0.08 mg/L(降雨事件Ⅰ和降雨事件Ⅲ),同时其他指标也达到湖泊、水景类水质标准,可作为景观类用水水源。This work investigates the runoff discharge pattern of pollutants, the event mean concentration (EMC) and the first flush effect of three rainfall events in the period of August to September 2018. The results show that the roof runoff is seriously polluted in the early stage, with the extension of time the pollutant concentrations would gradually decrease, and finally tend to be stable. And the larger the rainfall intensity is, the more obvious the pollutant concentrations change. By comparing the EMC of various pollutants in three rainfall events with the fifth class value of the surface water quality standards and aesthetic environment use standards, COD concentrations in runoff are higher. The mean TP concentrations (rainfall eventⅠand rainfall eventⅡ) reach esthetic environment use standard and become a potential energy source for lakes. The results provide data support for water quality evaluation of roof runoff and recycling of urban rainwater resources.

关 键 词：屋面径流 污染特性 出流规律 事件平均浓度 初始冲洗效果 

分 类 号：TV213.9[水利工程—水文学及水资源]