雨水管道沉积物污染初期冲刷效应及初期雨水量研究  

Study on first flush effect and initial rainwater volume in storm sewer sediments pollution

作　　者：张青文 余健[1] 李天兵 Zhang Qingwen;Yu Jian;Li Tianbing(College of Civil Engineering,Hunan University,Changsha 410082,China;Guangzhou Zhonggong Water Information Technology Co.,Ltd.,Guangzhou 510280,China)

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]广州中工水务信息科技有限公司,广州510280

出　　处：《给水排水》2020年第7期119-124,共6页Water & Wastewater Engineering

基　　金：湖南创新型省份建设专项经费(2019SK2111)。

摘　　要：为了控制雨水管道沉积物在降雨径流的冲刷下再悬浮随雨水排入受纳水体而造成的污染,利用SWMM软件构建汇水面污染冲刷模型,耦合管道沉积物冲刷模型,分析在管道沉积物影响下的径流污染初期冲刷效应,并提出一种初期雨水量的动态计算方法。结果表明:管道沉积物的存在会削弱初期冲刷效应,需要控制比地面截流3~5mm更多的初期雨水,可根据对降雨径流污染的监测数据,结合初期雨水的汇流规律,通过图解法求得。In order to control the pollution caused by storm sewer sediments discharging into the receiving water under the erosion of rainfall runoff,the flush model of catchment pollution build by SWMM and scour model of sewer sediments is necessary.The purpose is to analyze the first flush effect of runoff pollution under the influence of storm sewer sediments.And a dynamic calculation method of initial rainfall is put forward.The results show that the existence of storm sewer sediments will weaken the first flush effect.It is necessary to control more initial rainwater than the ground rainfall of 3~5 mm.The initial rainwater volume can be calculated by graphic method using the monitoring data of rainfall runoff pollution and initial rainfall confluence law.

关 键 词：管道沉积物 初期冲刷 初期雨水 SWMM 

分 类 号：TU990.3[建筑科学—市政工程]