A Study On The Visualization Of The Tsunami Disaster Process And Corresponding Evacuation Based On COMCOT

As one of the most serious natural disasters, Tsunami brings mankind withtremendous casualties and immeasurable property losses with its horrendousdestructive power. From the early study on the physical mechanism of tsunami tomore in-depth exploration on it today relying on the powerful capability of computers,such as numerical simulation of tsunami. Attention and research on tsunami go deeperalong with the development of the times. It is undoubted that there is of great valueand practical significance in profoundly understanding the mechanism and thehydrodynamic model of tsunami, building a visualized simulation and correspondingevacuation systems of tsunami on the basis of a reasonable and effective tsunamimode to provide convenient and intuitive tools for prevention and mitigation oftsunami and to develop and optimize the evacuation and asylum plan of tsunami.The COMCOT tsunami mode, developed by Cornell University in USA, can beaccurate to simulate the life cycle of tsunami, especially the tsunami originated froman earthquake. On the theoretical basis of this model, the paper aims to build avisualized process of tsunami and the evacuation and asylum system withcharacteristics of repeated simulations and exercises, using excellent visual simulationsoftware Vega.In the visualization part, we have real-time, dynamic andcomprehensive display of the life cycle of tsunami and its related referenceinformation through numerical simulation of2D and visual simulation of3D in orderto bring customers with intuitive understanding. In the evacuation and asylum part,through drawing the risk covered figure in target area and based on the “point-linebinding model”, the “one-destination road network model” and the strategy ofcalculating the cost of road, a simplified network system with the right-of-way of riskarea is established and in order to draw escape route in target area we are to determine the optimal evacuation path using the shortest path algorithm of Floyd.This paper has conducted a study of the visualization of tsunami and theevacuation process with a tsunami occurred in the South China Sea as an example.According to problems encountered in the research and practical needs, we suggest animproved pseudo-color image algorithm and a drawing strategy of tsunami wavesurface mesh based on the predicted viewpoint, better enhancing the real-time natureof the system and visual experience. Meanwhile, combining the results of research inthe field of emergency response, a new method of evacuation and asylum of tsunamiis proposed to provide scientific and effective support for decision makers in thedisaster prevention and mitigation work.Besides, in the case of the fixed amount ofasylums,0-1integer programming has been set to distribute them properly for therefugees.