Three-dimensional Dynamic Scene Simulation Of Dam-break Flood Routing In Urban Areas

With the development of human society,The growing demand for water resources is increasing,and more and more reservoirs are put into use.Once the dam breaks,urban people's lives and property will face huge losses.Dynamic scene simulation of dam-break flood routing can show the real scene before dam breaks,thus provides an important basis for personnel safety and property in the city.At present,the research of flood evolution visualization can show the main purpose of the hydraulic factors such as the flood water at a certain time,most of them only study on the regional topography and geomorphology and ignore the scene and flood flow pattern,so it has been unable to meet the needs.Recently,Research and Application about scene simulation has grown up,while the study now is still staying in static display and calculation of regional flood evolution,water depth,flow velocity uses one and two-dimensional flood routing model,three-dimensional dynamic scene simulation of dam-break flood routing in urban areas hasn't been realized.In view of the above problems,the visualization of dam break flood in urban area is studied by means of numerical simulation in this paper,thus three-dimensional dynamic scene simulation of dam-break flood routing in urban areas has been realized.The dynamic evolution process of the flood in the research scene is demonstrated,and the visual analysis basis and the important theoretical basis for the development of flood control and disaster reduction measures are provided.This paper mainly probes into the following several aspects:(1)The 3D model of the terrain model and dam break flood evolution of urban reservoir is established,and the control equation is solved by numerical simulation method.(2)CSG method is used to construct the 3D scene around the reservoir dam.The numerical simulation is used to simulate the flood evolution by using GUI technology.The system dynamics is used to simulate the flood.(3)Taking a certain city reservoir as an example,the probability of dam break is analyzed,and the regional terrain model is constructed,and the hydraulic parameters such as water depth,flow velocity and so on are calculated by numerical simulation.The scene model of urban reservoir is established,and the hydraulic parameters are analyzed by numerical simulation,and the evolution process of dam break flood is demonstrated.