基于GIS的城市内涝积水数值模拟

Numerical Simulation of Urban Waterlogging Based on GIS

根据城市内涝产流、汇流过程及其原理,以GIS为分析和开发工具,模拟、分析内涝积水的空间分布。基于DEM数据完成水流方向提取、汇流量计算,以及汇水区域提取,实现产流、汇流模拟。利用降水产、汇流的模拟结果,结合水文计算方法,基于GIS实现对城市内涝积水的数值模拟。

This paper first sets out the geographical data processing method of urban waterlogging of underlying factors,according to city DEM extraction of urban land surface hydrology and related factors and analysis.Secondly,the paper presents the analysis of the convergence of urban waterlogging of precipitation,runoff,and other processes,and in accordance with its principles and calculation methods,application of secondary development of GIS for modeling.Then,the paper uses urban municipal pipe network information to establish the urban drainage modeling,network capacity and urban DEM amendment,making urban drainage of model parameters,calculation and simulation of spatial-temporal distribution of urban waterlogging.