合流制排水系统的位置和面积比对径流污染影响的研究  

Study on the impact of location and area ratio of combined sewer systems on runoff pollution

作　　者：曹勇锋[1] 刘柏佑 仲崇军 林伟国 杜成银 CAO Yongfeng;LIU Baiyou;ZHONG Chongjun;LIN Weiguo;DU Chengyin(School of Civil Engineering and Transportation,Guangzhou University,Guangzhou 510006,China;Guangdong Branch of Beijing Municipal Engineering Design and Research Institute Co.,Ltd.,Guangzhou 510075,China;Guangzhou Urban Drainage Monitoring Station,Guangzhou 510710,China;Guangdong Shouhui Lantian Engineering Technology Co.,Ltd.,Guangzhou 510075,China)

机构地区：[1]广州大学土木与交通工程学院,广州510006 [2]北京市市政工程设计研究总院有限公司广东分院,广州510075 [3]广州市城市排水监测站,广州510710 [4]广东首汇蓝天工程科技有限公司,广州510075

出　　处：《安全与环境学报》2024年第11期4456-4463,共8页Journal of Safety and Environment

基　　金：广州市水务科技项目(2010210042023002)。

摘　　要：为了研究和控制合流制排水系统中径流污染对城市水环境的影响,采用InfoWorks ICM软件对广州市猎德涌流域的合流制排水系统进行水力水质建模,分析流域在3场降雨事件下合流制区域的不同位置和合流制汇水面积比对径流污染的影响,同时结合M(V)曲线分析管内径流的初期冲刷效应。结果显示,径流中固态悬浮物(Suspended Solids,SS)质量浓度总体呈现先快速上升然后下降的变化势态,而且径流初期的SS质量浓度高于后期。随着位置逐渐远离末端排口,径流污染的峰值逐渐向后推移,初期冲刷效应被削弱,M(V)曲线中前30%的累积径流比例所包含的累积污染负荷分别为44.2%~80.5%、46.3%~81.0%和16.9%~74.2%;随着合流制面积比值从0上升到50%,超标排放的持续时间、体积占比和排污量占比均逐渐提升,分别由28 min上升至126 min、15.64%上升至67.75%和28.38%上升至81.49%,初期冲刷效应越不明显,M(V)曲线散度以面积比值为0~10%的情况最大;降雨形成的管内径流对管渠末端沉积物的冲刷是溢流初期SS质量浓度激增的主要原因。To investigate and mitigate the impact of runoff pollution from the combined sewer system on the urban water environment,InfoWorks ICM software was utilized to model the hydraulic dynamics and water quality of the combined sewer system in the Lideyong Basin,Guangzhou.The study analyzed how various locations and catchment area ratios of the combined sewer system within the basin affected runoff pollution during three rainfall events.Additionally,the first flush effect of the runoff in the pipe was examined using the M(V)curve analysis.By comparing the simulation results of the water quality model against the monitoring data's Suspended Solids(SS)process line under identical rainfall patterns,and considering a Nash coefficient(NS)evaluation result of 0.72,a water quality simulation model was developed that can be applied to the drainage system in the study area.The results indicated that under varying rainfall intensities and types,the mass concentration of Suspended Solids(SS)in runoff exhibited a rapid increase followed by a decrease.Notably,the SS concentration during the initial stage of runoff was higher than in the later stages.Furthermore,the concentration peak at position②was significantly greater than those observed at positions①and③.As the location moved progressively away from the outfall,the peak of runoff pollution shifted upstream,with a secondary peak emerging at position③.The first flush effect gradually diminished.Additionally,the divergence of the M(V)curve followed this order:position②,position①,and position③.The cumulative pollution load for the first 30%of the cumulative runoff proportion was observed to be 44.2%-80.5%,46.3%-81.0%,and 16.9%-74.2%for positions②,①,and③,respectively.As the area ratio of the combined sewer system increased from 0%to 50%,the duration,volume ratio,and pollution volume ratio of excessive discharge gradually increased.Specifically,the duration ranged from 28 minutes to 126 minutes,the volume ratio increased from 15.64%to 67.75%,and the pollution vol

关 键 词：环境工程学 合流制排水系统 径流污染 面积比 初期冲刷效应 

分 类 号：X821[环境科学与工程—环境工程]