SWMM模型在深圳市民治河流域的应用

以深圳市民治河流域为研究区域,对组成排水系统的排水管网、道路和河道水系进行合理概化,构建了基于ArcGIS的排水系统数据库。利用流域DEM、街区和道路分布图在ArcGIS中对民治河流域进行子汇水区划分。由此基于双层排水系统思想构建民治河流域SWMM模型,并采用6场实测降雨资料对该模型进行验证,所得内涝淹没位置与实际调研情况基本相符,表明所建模型具有良好的精度和可靠性;分别对重现期为1、2、5、10、20年的设计暴雨情形下管道超负荷、节点溢流等情况模拟表明,该模型较好地评估了该流域排水管网的排水能力,为区域防洪排涝管理、调度、规划和雨洪资源利用提供了决策依据。

Application of SWMM Model in Minzhi River Basin of Shenzhen City

Taking Minzhi river basin of Shenzhen city as the study area, the drainage system including drainage network, roads and river system is reasonably generalized, and the database of drainage system is established based on ArcGIS. Using the distribution map of basin DEM, blocks and roads, sub catchment areas of Minzhi river basin are divided with ArcGIS. Based on the idea of double drainage system, the SWMM model of Minzhi river basin is constructed. And then the model is verified by six measured rainfall data. The simulated waterlogging submerged positions are basically coincided with the actual investigation situations. It shows that the model has good precision and reliability. In the design rainstorm of return period of 1, 2, 5, 10 and 20 year, drainage network overload and node overflow are respectively simulated by using the SWMM model, and the drainage capacity of the drainage network is preferably evaluated at the study area. It provides a decision making basis for the regional flood and drainage waterlogging management, scheduling, planning and the rain resources use.