【摘要】 雨水管道内的沉积现象不仅削弱了管道的排水能力,而且沉积的污染物还会对管道造成腐蚀,或在降雨时随径流排至受纳水体从而对其造成严重污染。对北京城区部分雨水检查井连接雨水管道内沉积物的沉积状况进行调研与分析,讨论了沉积状况的主要影响因素。结果表明,调研区域雨水排放管道内沉积现象普遍存在,且沉积量随管道管径的增加而增大。此外,不同材质管道内的沉积量也存在明显差异。该调研结果可为城市排水系统的管理提供参考,为城市水体污染控制提供一定的依据。更多还原

【Abstract】 Accumulation of solids in storm sewers results in not only a loss of flow-carrying capacity,but also corrosion of drainage pipes and pollution of receiving water bodies.Several storm sewers in Beijing were investigated,and impact factors on solids sedimentation were discussed.The results show that the sedimentation widely exists within storm sewers in the investigated area,and the sedimentation quantity is increased with increasing pipe diameter of storm sewers.In addition,the sedimentation quantities in storm sewers with different materials are significantly different.The investigation result provides reference for management of urban drainage system and control of water pollution associated with storm sewer sediments.更多还原