李小宁, 郑世威, 胡庆芳, 王金松, 胡尊乐, 王船海. 基于城市排水过程的内涝高效模拟方法[J]. 北京师范大学学报(自然科学版). DOI: 10.12202/j.0476-0301.2024039
引用本文: 李小宁, 郑世威, 胡庆芳, 王金松, 胡尊乐, 王船海. 基于城市排水过程的内涝高效模拟方法[J]. 北京师范大学学报(自然科学版). DOI: 10.12202/j.0476-0301.2024039
LI Xiaoning, ZHENG Shiwei, HU Qingfang, WANG Jinsong, HU Zunle, WANG Chuanhai. High efficiency urban flood inundation simulation based on the drainage process[J]. Journal of Beijing Normal University(Natural Science). DOI: 10.12202/j.0476-0301.2024039
Citation: LI Xiaoning, ZHENG Shiwei, HU Qingfang, WANG Jinsong, HU Zunle, WANG Chuanhai. High efficiency urban flood inundation simulation based on the drainage process[J]. Journal of Beijing Normal University(Natural Science). DOI: 10.12202/j.0476-0301.2024039

基于城市排水过程的内涝高效模拟方法

High efficiency urban flood inundation simulation based on the drainage process

  • 摘要: 近年来,极端暴雨事件的频繁发生使得内涝灾害日益成为影响我国经济社会发展的重大问题.本文从实际城市排水过程的角度出发,提出了基于汇水单元概念的城市内涝高效模拟方法.该方法以雨篦子作为出水口来划分汇水单元,进而计算城市地表产汇流、积水深度及分布.同时,引入了当量宽度的概念,实现了明渠与有压流两种状态下管道流量和水位计算方法的统一.基于水量平衡原理,利用雨篦子耦合城市地表与地下管网,并结合孔口来耦合管道与河道,构建了地表-管道-河道一体化的求解矩阵.本文将所提出的模拟方法植入成熟的太湖流域模型,并应用常州市城市产汇流与内涝试验基地的监测数据对该方法的有效性和模型的可靠性进行了评估,以期为城市内涝模拟提供新思路.

     

    Abstract: In recent years, the frequent occurrence of extreme rainfall events has increasingly become a significant issue affecting the economic and social development of China. This paper starts from the perspective of actual urban drainage processes and proposes an efficient simulation method for urban flood inundation based on the concept of catchment units. This method utilizes grate inlets as outlets to delineate catchment units, thereby calculating urban surface runoff, flood inundation depth, and distribution. Concurrently, the concept of equivalent width is introduced to unify the calculation methods for flow rate and water level in open channels and pressurized pipe flow conditions. Based on the principle of water balance, grate inlets are used to couple urban surfaces with underground pipelines, and orifices are used to couple pipes with rivers, thereby constructing an integrated solving matrix for surface-pipe-river systems. The proposed simulation method was incorporated into the mature Taihu Basin Model and applied to monitoring data from the urban runoff and flood inundation experimental site in Changzhou to evaluate the method's effectiveness and the model's reliability, aiming to provide new insights for urban flood inundation simulation.

     

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