基于SWMM的LID措施对城市面源污染削减效果研究  

Research on Effect of LID Measures on Urban Non-point Source Pollution Reduction Based on SWMM

作　　者：李连文 代张路 李昂[1] 刘加强[1] 苏林萌 LI Lianwen;DAI Zhanglu;LI Ang;LIU Jiaqiang;SU Linmeng

机构地区：[1]徐州工程学院环境工程学院,江苏徐州221111 [2]济南市市政工程设计研究院(集团)有限责任公司徐州分公司,江苏徐州221007 [3]江苏瑞杰项目管理顾问有限公司徐州分公司,江苏徐州221007

出　　处：《城市道桥与防洪》2022年第12期203-207,232,I0017-I0018,共8页Urban Roads Bridges & Flood Control

基　　金：徐州市重点研发计划(KC19218)。

摘　　要：城市面源污染已成为我国城市水环境治理的重点对象,但由于时空分布不均、污染途径随机及成分复杂多变等特点,使城市面源污染的治理难度较高。在充分调研的基础上,建立徐州经济技术开发区三八河流域SWMM模型,模拟分析研究不同重现期下(1 a、2 a、3 a、5 a、10 a)单一LID措施及组合LID措施对面源污染削减的效果。模拟结果表明:LID控制措施占比越高,对污染物的削减效果越好;城市径流污染受降雨强度影响较大,降雨强度越大,径流污染物平均浓度越低;生物滞留设施对污染物削减效果要优于雨水花园和绿色屋顶;LID措施组合使用时,多种源头控制措施并没有呈现叠加效果,建议应用源头控制措施加末端控制措施组合方案以提高污染物削减效果。Urban non-point source pollution has become a key object of urban water environment governance in China, but due to the uneven distribution of time and space, random pollution routes and complex and changeable composition, the treatment of urban non-point source pollution is more difficult. On the basis of full research, the SWMM model of the Sanba River Basin of Xuzhou Economic and Technological Development Zone is established to simulate and analyze the effects of single LID measures and combined LID measures on the source pollution reduction under the different recurrence periods(1 year, 2 years, 3 years, 5 years and 10 years). The simulation result shows that the higher the proportion of LID control measures, the better the reduction effect on pollutants. The urban runoff pollution is greatly affected by the intensity of rainfall, and the greater the rainfall intensity, the lower the average concentration of runoff pollutants. The bioretention facilities are better at reducing pollutants than the rainwater garden and green roof. When LID measures are used in combination, the multiple source control measures do not show a superposition effect. It is recommended to apply a combination scheme of source control measures and end control measures to improve the effect of pollutant reduction.

关 键 词：SWMM模型 城市面源污染 LID控制措施 组合措施方案 污染物排放平均浓度 污染物削减率 

分 类 号：X52[环境科学与工程—环境工程]