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李明慧, 侯精明, 王 添, 栾广学, 银雅伦, 杨 露, 李欣怡, 樊 超, 沈 建.基于SWMM的银川市金凤区雨洪模拟及LID效果评估水资源与水工程学报[J].,2023,34(2):128-134
基于SWMM的银川市金凤区雨洪模拟及LID效果评估
Rainstorm simulation and LID effect evaluation of Jinfeng District, Yinchuan based on SWMM
  
DOI:10.11705/j.issn.1672-643X.2023.02.16
中文关键词:  海绵城市  低影响开发(LID)  SWMM  雨水径流控制  污染物削减  银川市金凤区
英文关键词:sponge city  low impact development (LID)  storm water management model (SWMM)  rainfall runoff control  pollutant reduction  Jinfeng District of Yinchuan City
基金项目:中德合作交流项目(M-0427);国家自然科学基金项目(52079106、52009104);陕西省科技创新团队项目(2020TD-023)
作者单位
李明慧1, 侯精明1, 王 添1, 栾广学1, 银雅伦1, 杨 露1, 李欣怡1, 樊 超2, 沈 建2 (1.西安理工大学 省部共建西北旱区生态水利国家重点实验室 陕西 西安 7100482.中规院(北京)规划设计有限公司 北京 100044) 
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中文摘要:
      针对城市内涝及非点源污染问题,从海绵城市建设的角度出发,以银川市金凤区作为研究区域,采用SWMM建立雨洪模型,选取设计雨峰系数为0.4的5种降雨重现期和降雨重现期为0.5 a的4种雨峰系数共9场降雨,评估研究区在下凹式绿地、透水铺装、雨水花园、下凹式绿地组合透水铺装及雨水花园组合透水铺装5种LID方案下对径流及4种污染物的控制效果。模拟结果表明:随着重现期的增大,5种方案的径流控制率及污染物负荷削减率均有所减小;下凹式绿地组合透水铺装方案的削减效果最为显著,重现期为0.5~5 a时,该方案径流控制率均大于65%,污染物负荷削减率均大于45%;重现期为10 a时,径流控制率及TSS、COD、TP与TN负荷削减率分别为61.38%、42.86%、58.23%、44.03%和55.95%;重现期为0.5 a时,随着雨峰系数的增大,5种LID方案的径流控制率及污染物负荷削减率的变化均不明显。LID方案对中小重现期降雨有较好的控制效果,但因组合方案各措施间受到相互作用及不透水面积等因素的影响,并未达到“1+1>2”的叠加效应,最优方案还需深入研究。
英文摘要:
      In view of urban waterlogging and non-point source pollution, the SWMM is used to establish a stormwater model for Jinfeng District of Yinchuan City from the perspective of sponge city construction. Five return periods with a design rainfall peak coefficient of 0.4 and four rainfall peak coefficients with a return period of 0.5 a constitute a total of nine rainfall events, which are adopted to assess the control effect of five LID schemes of concave green space, permeable pavement, rain garden, the combination of concave green space and permeable pavement, the combination of rain garden and permeable pavement on runoff and four pollutants. The simulation results show that the runoff control rate and pollutant load reduction rate of the five schemes decrease with the increase of the return period; concave green space has the best performance, when the return period is 0.5-5 a, the runoff control rate of each scheme is greater than 65%,and the pollutant load reduction rate is greater than 45%; when the return period is 10 a, the runoff control rate and the reduction rate of TSS, COD, TP and TN load are 61.38%,42.86%,58.23%,44.03% and 55.95%, respectively; when the return period is 0.5 a, with the increase of rainfall peak coefficient, the runoff control rate and pollutant load reduction effect of the five LID schemes show no obvious changes. The LID schemes have a good control effect on rainfall with medium and small return periods; however, the superposition effect of “1+1>2” has not been achieved, due to the interaction among various measures of the combined schemes and the impervious areas in between, and the optimal scheme is yet to be discussed in further study.
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