摘要
为了避免汇水面源头以及分流制雨水管道系统中沉积的大量污染物在降雨时随雨水径流被冲刷进入水体,从而控制径流对水环境构成的冲击性污染,从理论和试验2方面分析了管道径流污染物(汇水面和管道沉积物2个来源)的流失规律.结果表明,汇水面源头污染物流失较符合源头冲刷的指数衰减模型,管道内沉积物流失可用流量曲线模型计算;管道内沉积物占管道径流污染物的比例越大,管道径流的初期冲刷现象越不明显.为了提高径流污染控制设施的效率,宜在源头进行分散控制,并加强雨水管网系统清洁维护,避免污染物的积累.
It is important to control runoff pollution flushed to the water-system, and avoid large amounts of pollutants from catchments and pollutants settled and accumulated in storm sewers from being washed out to receiving waters in wet weather. A discharge law of different source pollutants （ from catchments and sewer） was analyzed by theory and experiment. It was shown that the pollutant discharge law from catchments accords with an exponential washoff model, but sediment pollutants in the sewer fit a rating curve washoff model. The more the sediments, the weaker the first flush effects would be. To ensure high running efficiency of runoff control facilities, source pollution control is important, and effective storm sewer system maintenance is a significant measure to avoid accumulation of contaminants,
出处
《环境科学学报》
CAS
CSCD
北大核心
2009年第4期771-776,共6页
Acta Scientiae Circumstantiae
基金
国家自然科学基金项目(No.50808009)
国家科技支撑计划课题(No.2006BAJ08B04)
北京市教委科技计划项目(No.KM200810016012)~~
关键词
管道沉积物
初期冲刷
指数衰减模型
流量曲线模型
径流污染控制
storm sewer sediment
first flush
exponential washoff
rating curve washoff
stormwater pollution control
