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中文摘要：
城市降水径流污染中的污染物主要来自降水、城市地表和排水系统。根据武汉不透水区、透水区和森林覆盖区的不同区域的采样试验分析得出，降水径流污染除了受大气质量影响外，还受到降水强度、降水量、降水历时、降水间隔时间和汇水面等因素的影响；屋面径流污染物的来源具有多样性、复杂性和不确定性，除了大气湿沉降带来各种不同类型的污染物外，还受到屋面材料、屋面年限、材料腐蚀、管道腐蚀和污染残留物等因素的影响。一般规律是降水径流初始污染物浓度高，随着降水历时的延长，降水径流污染物浓度逐渐降低。在合流制排水系统的城市，有20％～60％的径流污染（SS、COD和BOD1）来自排水系统。因此，改造排水系统、控制径流污染，可以维持生态平衡和保护城市水环境。
英文摘要：
The urban rainfall runoff pollution originates from the precipitation, the urban surface and the drainage system. According to the sampling experiment on non-water leakage area, water leakage area and forest covering area in Wuhan, besides the air quality, rainfall runoff pollution is affected by the intensity and volume of rainfall, the time of rainfall, the interval of rainfall events, and the quality of collection are- a. The source of roof runoff pollution has variety, complexity and indefiniteness. Besides different kinds of pollution brought by the air subsidence, roof runoff pollution is affected by roof material, the using time of roof, material corrosion, pipeline corrosion and pollution residuum. In general, the first contaminant con- centration of rainfall runoff is high and the contaminant concentration is decreasing, with the time of rain- fall prolonging. In the combined sewer networks, the erosion of the in-sewer pollutant stocks can provide 20~60~ of total SS, COD, BODs. Therefore, In order to maintain ecologic balance and protect water environment in cities, it is necessary to rebuild the drainage system and control runoff pollution.
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