基于FVCOM模型的无管网资料地区暴雨内涝模拟研究  

Study on simulation of urban flooding in areas without drainagepipe data based on FVCOM model

作　　者：李陪然 刘非 陈垚[1,2,3] 魏书仪 代晟 LI Peiran;LIU Fei;CHEN Yao;WEI Shuyi;DAI Sheng(Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education,Chongqing Jiaotong University,Chongqing 400074,China;College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Engineering Laboratory of Environmental Hydraulic Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

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]重庆交通大学河海学院,重庆400074 [3]重庆交通大学环境水利工程重庆市工程实验室,重庆400074

出　　处：《人民长江》2025年第1期31-39,共9页Yangtze River

基　　金：重庆市水利科技项目(CQSLK-2023026);重庆市科学技术局技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0200);重庆市教育委员会科学技术研究项目(KJ202200775487439);重庆市人力资源和社会保障局留学人员回国创业创新支持计划入选项目(CX2023053);重庆交通大学水利水运工程教育部重点实验室开放基金项目(SLK2023B11)。

摘　　要：为实现无管网资料地区内涝风险模拟,以重庆市渝北区悦来新城排水片区为研究区域,采用降雨率折现法、全域等效排水法、道路等效排水法、雨水井等效排水法等4种方法等效替代管网排水能力,并构建基于Finite Volume Coastal Ocean Model(FVCOM)的全水动力雨洪模型,采用理想算例与实测降雨验证模型,选取最合适的等效模型对研究区不同雨型下的内涝积水特征进行模拟分析,并基于洪水危险率分析内涝风险。结果表明:降雨率折现法、全域等效排水法、道路等效排水法和雨水井等效排水法模拟所得易涝点积水面积平均相对误差分别为36.49%,43.31%,8.18%和4.42%,相比之下雨水井等效排水法模拟效果最好,但在无街景区域可能存在一定限制;相同重现期下,雨峰靠前的降雨初期积水增加更快,雨峰靠后的降雨导致的内涝风险相对更高;相同雨峰系数下,重现期越大,积水面积和积水量均越大,整体内涝风险越高。研究成果可为管网资料缺乏地区城市内涝模拟提供参考。To conduct the urban flood risk simulation in areas without drainage pipe survey data,taking the catchment area in Yuelai New Town,Yubei District,Chongqing City as the study area,four equivalent methods were adopted to represent the drainage capacity,that is discounted rainfall method(DRM),the equivalent infiltration approach in all areas(EIA),equivalent infiltration approach on road only(EIR),and the stormwater manhole equivalent infiltration method(SME).And an urban flood model based on the Finite Volume Coastal Ocean Model(FVCOM)was established.An idealized case and the measured rainfall data were used to validate the flood model.The equivalent method with the best performance was used to simulate and analyze the flood characteristics under different rainfall types in the study area,and the flood risk was analyzed based on the flood hazard index.Results show that the average relative errors of the flood areas simulated by DRM,EIA,EIR,and SME are 36.49%,43.31%,8.18%,and 4.42%,respectively,and the performance of SME was the best,but there may be limitations in areas without street views.Under the same rainfall return period,the flood accumulates faster at the initial stage of rainfalls that have earlier peaks,while the flood risk caused by rainfalls with later peaks is relatively higher.In case of the same rainfall peak,the larger the return period,the greater the flooding area and volume,and the higher the overall flooding risk.The proposed method can technically support urban flood management,especially for areas where drainage pipe data is unavailable.

关 键 词：暴雨雨型 内涝风险 等效排水方法 FVCOM 无管网资料地区 重庆市 

分 类 号：TU992[建筑科学—市政工程]