【摘要】 在北京市城区部分排水管道调研的基础上,通过监测西城区上游、下游雨水管道检查井断面径流中的污染物,研究管道沉积物在次降雨条件下的冲刷释放污染负荷.结果表明,在城市降雨径流污染控制中,雨水管道沉积物的冲刷释放作用对管道出流的污染贡献不可忽视.对于本研究所选取的雨水管道,其中84 m管道中沉积物次降雨(2010年7月9日)过程中对径流出流的污染负荷贡献率分别为:TN(总氮)8.5%、TP(总磷)8.2%、COD 18.3%、SS(悬浮颗粒物)7.7%;295 m管道中沉积物次降雨过程中(2010年8月4日)的污染负荷贡献率为:TN(总氮)23.12%、TP(总磷)30.01%、COD 33.78%、SS(悬浮颗粒物)31.89%.因此,为保证城市水环境得到根本的改善,明确雨水管道沉积物冲刷释放的量对径流总量的控制有一定的借鉴意义.更多还原

【Abstract】 Based on the investigation of sewer sediments in Xi Cheng district in Beijing,scour-release pollution load in one rainfall from sewer sediments was studied by monitoring the pollutants in the run-off of manhole’s section.It was shown that the contribution of scour-release pollutants from sewer sediments to sewer outflow was obvious.The contribution rate of the sediments pollution load to runoff outflow in the 84 m pipeline in one rainfall(9 Jul.,2010) was as follows: TN 8.5%,TP 8.2%,COD 18.3%,SS 7.7%,respectively.And the pollutant contribution rate in the 295 m pipeline in another rainfall(4 Aug.,2010) was TN 23.12%,TP 60.01%,COD 33.78%,SS 31.89%.Therefore,it is important to control the pollution from sewer sediments for the improvement of water environment.更多还原