三维GIS的城市暴雨积涝灾害模拟

发布时间：2018-11-07 14:13

【摘要】：针对传统基于二维GIS进行城市暴雨积涝模拟分析不能立体地展现积涝灾害动态演进过程、地物受灾情况的问题,该文提出了基于三维GIS进行城市暴雨积涝灾害模拟分析。该方法综合应用精细化建模与地物拉伸建模技术,通过区域DEM构建、地表路面建模、建筑物建模、地形匹配构建研究区三维模型;以改进的D8算法进行汇水区划分,应用径流系数法进行汇水区产流计算。研究结果表明,该方法能够有效实现三维场景中暴雨积涝积水深度、积水范围计算以及积水深度、受灾房屋、受灾道路可视化表达,为城市暴雨积涝灾害防灾减灾提供技术支撑。
[Abstract]:Aiming at the problem that the traditional simulation analysis of urban rainstorm accumulation and waterlogging based on 2D GIS can not show the dynamic evolution process of accumulated waterlogging disaster and the disaster situation of ground objects, this paper puts forward the simulation analysis of urban rainstorm flood disaster based on 3D GIS. The method synthetically applies fine modeling and ground object stretching modeling technology to construct 3D model of research area through area DEM construction, surface pavement modeling, building modeling and terrain matching. The improved D8 algorithm is used to divide the catchment area and the runoff coefficient method is used to calculate the runoff yield in the catchment area. The research results show that the method can effectively realize the depth of accumulated waterlogging, the calculation of water accumulation range, the depth of water accumulation, the affected house and the affected road in 3D scene. To provide technical support for urban rainstorm accumulation and waterlogging disaster prevention and mitigation.
【作者单位】：南京信息工程大学地理与遥感学院;南京信息工程大学气象灾害省部共建教育部重点实验室;
【基金】：江苏省自然科学基金项目(BK20151458) 江苏省博士后科研基金项目(1101024B) 中国气象局北京城市气象研究城市气象科学研究基金项目(IUMKY&UMRF201103)
【分类号】：P208;P426.616

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