摘要
针对目前市政排水与水利排涝两个行业、两个体系导致标准不衔接的问题,提出城市内涝防治的多层级目标,统一设置“低标不积水、涝标不成灾、超标可应对”3个层次的防涝标准和相应的积水范围、积水深度、积水时间、城市基本功能正常发挥程度等防涝目标。以浙江省义乌市中心城区为研究区域,利用MIKE FLOOD模型耦合MIKE Urban一维管网模型、MIKE 11一维河流模型、MIKE 21二维地表漫流模型,建立了“水-地-管-河”耦合的义乌市城市防涝水文水动力模型,通过2场实测暴雨洪水资料对模型进行了参数校准和验证。结果表明:建立的模型较好地模拟了降雨后地下管网的产汇流状态、洪水在河道的演进过程以及河流、管网漫水后在二维地形的淹没情况;多层级目标耦合后,低标情景下的义乌市中心城区排水管道满管率由65.3%上升至76.0%,说明“水-地-管-河”的耦合作用对城市防涝有一定影响。多层级目标耦合的城市防涝模型可较好反映城市防涝工程与非工程体系的实际运行状态和防涝效果,可为城市内涝治理提供参考。
Aiming at the current issue of standards disconnection between municipal and water conservancy drainage systems,we proposed multi-level targets for urban waterlogging prevention and control,and set three levels of urban waterlogging prevention and control standards,which were"no water accumulation on the ground within low-standard rainfall;no waterlogging disasters within modest rainfall;cable of handling under extra-large rainfall".Furthermore,corresponding urban waterlogging prevention and control targets were clarified,such as waterlogging scope,waterlogging depth,waterlogging duration,and normal degree of urban basic functions.Taking the urban area of Yiwu City,Zhejiang Province as the research area,the MIKE FLOOD model was used to couple the MIKE Urban one-dimensional pipe network model,the MIKE 11 one-dimensional river model,and the MIKE 21 two-dimensional surface overflow model to establish a coupled hydrological and hydrodynamic model of"water-land-pipe-river".The model was calibrated and verified by two measured rainstorm flood data.The results show that the established model can well simulate the runoff generation and confluence state of underground pipe network after rainfall,the routing of flood in river channels and the submergence in two-dimensional terrain after river and pipe network overflows,which can achieve whole-domain,whole-factor and whole-process simulation.Under the low-standard scenario in urban area of Yiwu City,the overflow rate of drainage pipes increases from 65.3%to 76.0%after multi-level targets coupling,which indicates that the coupling effect of water-land-pipe-river has a significant impact on urban waterlogging preventing and control.The urban waterlogging control model based on multi-level target coupling can accurately reflect the actual operation state and waterlogging prevention effect of urban waterlogging prevention engineering and non-engineering system,and can provide reference for urban waterlogging control.
作者
周雁潭
刘立军
李鹏辉
孟祥永
ZHOU Yantan;LIU Lijun;LI Penghui;MENG Xiangyong(Zhejiang Institute of Hydraulics and Estuary(Zhejiang Institute of Marine Planning and Design),Hangzhou 310020,China;Zhejiang Provincial Key Laboratory of Hydraulic Disaster Prevention and Mitigation,Hangzhou 310020,China)
出处
《人民长江》
北大核心
2024年第5期15-22,32,共9页
Yangtze River
基金
国家自然科学基金项目(51609213)
浙江省水利科技计划项目(RC2217,RB2202)。
关键词
城市内涝
城市防涝标准
管网模型
河流模型
地表漫流模型
义乌市
urban waterlogging
waterlogging prevention and control standard
pipe network model
river model
surface overflow model
Yiwu City
