| In recent years,the disasters of waterlogging caused by rainstorms in China’s urban areas have happened frequently.Nevertheless,the problems of the difficulty of drainage and the loss of rainwater are the common phenomenon in traditional urban roads,which bring great harm not only to ecological environment but also to citizen’s life and property.In general,the occurrence and the damage of urban waterlogging often fails to provide rescuers with simulation environment,especially rain waterlogging,whose severity and calamity are difficult to simulate through traditional methods.This research selects some parts of urban areas to make an early-stage exploration on waterlogging disaster simulation.It uses Unity3 D to simulate driving engine and waterlogging models to simulate the occurrence and development of waterlogging in urban areas.A three-dimension system of disaster analysis based on 3D simulation results of urban waterlogging was implemented.The system,based on the rainfall intensity,rainfall duration,surface drainage rate and infiltration rate which edit by users,could quickly create 3D virtual scenes of urban waterlogging disasters,which were not subject to the costs and personnel and other external conditions.With the help of unity3 D technology to construct the urban three-dimensional environment in planning,people may use dynamic interaction to carry out a simulated survey of planning buildings or urban areas.Based on this,the conceptual framework of urban waterlogging risk assessment system was established,combining with the city as the particularity of hazard-affected body,using assignment method to get the value of the relevant models in simulative urban areas,adopting C# language compilation,and drawing GUI parameter input interface to build into a whole urban waterlogging simulation system.The first perspective roam manner can be used to observe city’s precipitation variations in the virtual scene.Meanwhile,on inputting assumed parameters into 3D scene,one can get the different situation of waterlogging disasters in the different cases of rainfall intensity and duration.It not just provides the research with evidence,but provides Unity3 D with a new approach in urban disaster prevention. |
