Study On Urban Waterlogging Simulation And Visualization Method Based On SWMM

Urban waterlogging is the phenomenon of flood in cities when heavy rainfall overload the drainage system and exceeds the infiltration and storage.As a common natural disaster in China,Urban waterlogging disasters seriously restricted the development of society.Nowadays,while the computer technology is developing continuously,the urban waterlogging model is also constantly improved.These models can simulate the process of urban waterlogging,but the simulation results are not intuitive,so it is difficult for users to understand how the model works.Therefore,it is important to find a way to show the simulation results so that people can see the waterlogging simulation intuitively.Nowadays,many studies focus on both urban waterlogging model and visualization methods.However,there are fewer studies on the combination of the two.As a 3D visualization platform,Cesium has the characteristics of open source,good compatibility and high rendering efficiency.The combination of the urban waterlogging model and the Cesium 3D visualization platform facilitates the intuitive expression of the simulation results and can better adapt to cross-platform applieations.Without visualization,the results of the simulation are only some complicated and unintuitive figures for most non-experts.It can better meet the needs of different terminal devices of different users for the visualization platform,so that users can obtain the disaster information more accurately and intuitively.It is conducive to respond to sudden disasters more quickly and efficiently.This paper attempts to analyze the relationship patterns and structural features in hydrological model data,study the interactive method of hydrological model and 3D visualization,and explore the method of combining waterlogging evolutionary processes and mechanisms with 3D visualization.The main work and conclusions in this study include:(1)Research on visualization-oriented urban waterlogging model and its process simulation.Based on the analysis of the process of urban waterlogging,I analyzed the modeling principle of urban waterlogging model and the module mechanism of each part of the model.Then,the method of the waterlogging model parameter determination and its influence on the simulation result are studied.At last,the data modeling method of S WMM is studied.(2)Research on the visualization method and integration of SWMM and Cesium platform.This paper analyzes the open source data interface of SWMM and studies the integration method of SWMM with Cesium platform and the related technology of 3D visualization.Then I visualize the urban waterlogging process data of SWMM in 3D scenes.(3)The development and implementation of the three-dimensional visualization system of urban waterlogging.This paper designs and develops the urban waterlogging three-dimensional visualization system,and compares the simulation results of different values of parameters.The experiment shows the availability of the three-dimensional visualization method of urban waterlogging in this paper.It has certain value for the emergency management of urban waterlogging disasters.