基于FloodArea模型的重庆沙坪坝区内涝风险评估研究
Risk Waterlogging Assessment Methods Based on the FloodArea Model——A Case Study of Shapingba District of Chongqing

基于FloodArea二维水动力模型、数字高程模型和土地利用数据, 以重庆市沙坪坝区为研究区域, 对其24 h历时5 a重现期暴雨雨型进行模拟计算, 得到面雨量与淹没水深关系, 并根据3个淹没等级计算出内涝隐患点的致灾临界雨量; 同时对24 h历时的10, 20, 30, 50和100 a重现期暴雨雨型进行了模拟, 并根据风险矩阵法研制了沙坪坝区城市内涝风险区划图.实验结果表明：FloodArea水文模型在城市内涝对于面雨量和地表径流关系上拟合较好, 为城市内涝风险区划计算也提供了物理基础.
Based on the 2D hydrodynamic model FloodArea, Digital Elevation Model (DEM) and land-use data, taking the Shapingba District of Chongqing City as the study area, simulated calculation was made of its 24-hour short duration storm rainfall pattern of 5-year return period, and the relationship of area precipitation with submergence depth was obtained, Then, the disaster-causing critical precipitation of waterlogging potential spots was calculated based on the 3 grades of submergence. Meanwhile the 24-hour short duration storm rainfall patterns of 10-year, 20-year, 30-year, 50-year and 100-year return periods were simulated, and an Urban Waterlogging Risk Zoning Map of Shapingba District was developed based on the risk matrix method. The experimental results showed that the hydrological model FloodArea could well simulate the relationship of area precipitation and surface runoff in the urban waterlogging study area, and could be used to offer a physical basis in order to calculate the urban waterlogging risk