城市雨水排放系统的数值模拟技术及其应用

该文以暴雨管理模型(SWMM)为基础介绍了管网模型的基本概念、原理和建模方法,利用Arcgis辅助处理模型基本数据,采用泰森多边形(Thiessen Polygons)算法划分汇水区域。通过建立城市雨水排放系统的数值模型,对研究区域内管网进行排水能力评估,并模拟了不同外江水位对城市排水系统的影响。雨水排放系统的数值模拟技术可对设计管网进行优化,便于管理部门进行管网信息查询和维护,更可通过模拟预测未来可能发生的洪涝灾害并提前作出防灾预案。

Numerical Simulating Technology of Urban Rainwater Discharge System and Its Application

Based on the storm water management model (SWMM), the article introduces the basic conception, principle and modeling method of the pipeline network model, uses the Arcgis to process the basic data of the model, and adopts the Thiessen Polygons algorithm to divide the catchment area. The numerical model of urban rainwater discharge system is set up to evaluate the drainage capacity of the areal pipeline network, and to simulate the influence of the different water levels of the exterior rivers on the urban drainage system. The numerical simulation technology of rainwater discharge system can optimize the design of pipeline network, which can be easy for the management departments to refer to the information and to maintain the pipeline network, and can still forecast the flood and waterlog disasters possibly to happen in the future by the simulation and propose the disaster prevention plan ahead of time.