基于GIS构建邯郸市某区SWMM雨洪模型的方法研究

Method of Constructing SWMM Storm Flood Model in a District of Handan City based on GIS

以河北省邯郸市某区雨水管网为例,通过建立GIS管网、划分子汇水区、构建地面高程图、绘制土地利用类型图及计算模型参数,借助GIS空间数据及融合理论和SWMM产流、汇流理论搭建雨洪模型,模拟4种不同重现期的降雨情境,验证模型的准确性,分析模型运行后雨水管网排水能力。结果表明,该方法建立模型的准确性高、适用性强,连续性误差均在5%以内,可直观反映雨洪情况。

Taking a district of Handan City in Hebei Province as an example,this study establishes GIS pipe network,delineates the catchment area,constructs ground elevation map,draws land use type map and calculates model parameters,builds storm flood model with the help of GIS spatial data,fusion theory and SWMM flow generation and confluence theory,simulates four rainfall scenarios of different recurrence periods,and verifies the accuracy of the model.Analyze the drainage capacity of rainwater pipe network after the model runs.The results show that the model established by this method has high accuracy and strong applicability,and the continuous error is less than 5%,which can reflect the storm flood situation intuitively.