芜湖市中心城区内涝风险模拟分析

Waterlogging Simulation and Risk Analysis in Wuhu Urban Area

摘要: 在调查分析芜湖市中心城区雨水管道、排涝水系和排涝泵站等现状防涝系统情况的基础上，基于MIKE FLOOD耦合模型评估芜湖市中心城区内涝风险。将一维管网模型、河网模型以及二维地表漫流模型进行耦合计算，分析设计重现期为30年一遇的24小时暴雨情况下的城区内涝风险分布情况。根据芜湖市的排涝分区和中心城区内涝防治标准，通过积水深度和积水时间两个指标对城区内涝风险区域进行划分，得到芜湖市中心城区的高、中、低内涝风险范围。结合现状情况分析发现芜湖市城北片内涝主要是由于雨水管网排水标准不达标；城南和三山内涝原因是城市新建区域较多，存在大面积的低洼空间。通过对芜湖市城区内涝风险进行系统性分析，可以为后续的城区内涝防治工程实施和管理提供依据。

Abstract: Based on the investigation of current flood control system such as rainwater pipeline, drainage system and drainage pumping station, MIKE FLOOD coupling model is used to evaluate the waterlogging risk in Wuhu urban area. The one-dimensional pipe network model, the river network model and the two- dimensional surface flow model are coupled to simulate the urban waterlogging and analyze the waterlogging risk distribution in Wuhu urban area under the 24-hour torrential rain with a return period of 30 years. According to the two indicators of water depth and ponding time, the waterlogging risk level in urban area is determined. The waterlogging in the Chengbei area is mainly due to the poor drainage construction of rainwater pipeline network; the waterlogging in the Chengnan area and Sanshan area is due to the large area of low-lying space in these newly built sectors. Through systematic analysis of the waterlogging risk, it can be used as reference for the waterlogging drainage project in Wuhu urban area.