基于SWMM模型的万州龙宝河片区径流污染控制研究  

Study on runoff pollution control in Longbao River of Wanzhou based on SWMM model

作　　者：袁绍春 牟伟 吕波 杨清伟[1] 樵凌枫 郑若烨 YUAN Shaochun;MOU Wei;LYU Bo;YANG Qingwei;QIAO Lingfeng;ZHENG Ruoye(Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education,Chongqing Jiaotong University,Chongqing 400074;Engineering Research Center for Sponge City Construction of Chongqing,Chongqing 400020;Chongqing Engineering Laboratory of Environmental Hydraulic Engineering,Chongqing Jiaotong University,Chongqing 400074;Chongqing Academy of Science and Technology,Chongqing 401123;Chongqing Municipal Research Institute of Design,Chongqing 401120)

机构地区：[1]重庆交通大学水利水运工程教育部重点实验室,重庆400074 [2]重庆市海绵城市建设工程技术研究中心,重庆400020 [3]重庆交通大学环境水利工程重庆市工程实验室,重庆400074 [4]重庆市科学技术研究院,重庆401123 [5]重庆市市政设计研究院有限公司,重庆401120

出　　处：《环境污染与防治》2023年第6期765-770,776,共7页Environmental Pollution & Control

基　　金：重庆市自然科学基金资助项目(No.cstc2020jcyj-msxmX1000);重庆市建设科技项目(城科字2021第7-14)。

摘　　要：为评价重庆万州龙宝河片区海绵城市改造的径流污染控制效果,运用SWMM模型模拟该片区的径流过程,研究不同重现期下绿色屋顶、透水铺装、生物滞留带等低影响开发(LID)设施对污染物的控制效果。结果表明:当重现期为1~50 a时,LID设施对悬浮固体(SS)、化学需氧量(COD)、总磷(TP)、总氮(TN)的总量削减率分别可达47%~72%、56%~70%、48%~64%、43%~66%;对上述污染物峰值浓度的削减率分别为31.31%~41.05%、25.12%~38.93%、22.50%~31.38%、13.39%~21.76%,并能延迟峰现时间2~11 min。由此可见,海绵城市改造能够有效缓解径流污染,但随着重现期增加,控制效果会变差,说明海绵城市更适用于低降雨强度的径流污染控制。In order to evaluate the runoff pollution control effect of sponge city construction in Longbao River of Wanzhou,Chongqing,SWMM model was used to simulate the runoff process,and the impact of low impact development(LID)facilities like green roof,penetrative pavement and bioretention zone on pollutants control under different return periods was studied.Results showed that when return periods was 1-50 a,the total reduction rates of suspended solids(SS),chemical oxygen demand(COD),total phosphorus(TP)and total nitrogen(TN)by LID facilities could reach 47%-72%,56%-70%,48%-64%and 43%-66%,respectively.The reduction rates of the peak concentration of the above pollutants were 31.31%-41.05%,25.12%-38.93%,22.50%-31.38%and 13.39%-21.76%,respectively.And the peak concentration could delay by 2-11 min.It could be seen that the sponge city construction could effectively alleviate runoff pollution,but with the increase of return period,the control effect gradually decreased,indicating that sponge city was particularly suitable for runoff pollution control when rainfall intensity was low.

关 键 词：径流污染控制 重现期 低影响开发设施 SWMM模型 海绵城市 

分 类 号：X52[环境科学与工程—环境工程]