城市防涝风险分析研究——以武汉光谷中心城为例

Analysis and Research on Urban Waterlogging Risk—A Case of Guanggu Central City, Wuhan

摘要: 随着城市的发展和各地新城规划建设步伐的加快，在极端气候影响下，雨洪灾害给新建城区造成的损失也越来越大，因此对建设过程中的新城区防涝风险的分析研究变得非常重要。本文以正在规划建设过程中的武汉光谷中心城为研究对象，利用MIKE URBAN和MIKE 21分别构建中心城区一维和二维水动力模型，并通过MIKE FLOOD耦合计算了在50年一遇暴雨条件下的城市洪涝情况，通过分析洪水演进过程、绘制洪水风险图及分析内涝原因，评估城区面临的防涝风险。结果表明中心城部分区域面临一定的洪涝威胁，从而为城市下一步的风险评估提供借鉴，并为防汛部门制定排涝减灾策略提供科学的依据。

Abstract: With the development of cities and the acceleration of planning and construction of new towns, under the influence of extreme climate, the losses caused by rainstorm and flood disasters to new urban areas are also increasing. Therefore, it is very important to study the risk of waterlogging prevention in new urban areas in the process of construction. This paper takes Wuhan Guanggu Central City in the process of planning and construction as the research object. In order to analyze the flood risk in Guanggu Central City, one-dimensional and two-dimensional hydrodynamic models are constructed by MIKE URBAN and MIKE 21 respectively, and the urban flood process under 50-year frequency rainstorm is calculated by MIKE FLOOD coupling. By analyzing the flood evolu-tion process, drawing the flood risk map and analyzing the causes of waterlogging, the waterlogging risk faced by the urban area was evaluated. The results show that some areas of the Central City are faced with certain risk of waterlogging, which provides reference for the risk assessment of the next step of the city, and provides scientific decision-making basis for the flood control departments to formulate flood drainage and disaster reduction strategies.