Abstract
Abstract. Disaster risk is a function of hazard and vulnerability. Risk is defined as the expected losses, including lives, personal injuries, property damages, and economic disruptions, due to a particular hazard for a given area and time period. Risk assessment is one of the key elements of a natural disaster management strategy as it allows for better disaster mitigation and preparation. It provides input for informed decision making, and increases risk awareness among decision makers and other stakeholders. Virtual globes such as Google Earth can be used as a visualization tool. Proper spatiotemporal graphical representations of the concerned risk significantly reduces the amount of effort to visualize the impact of the risk and improves the efficiency of the decision-making process to mitigate the impact of the risk. The spatiotemporal visualization of tsunami waves for disaster management process is an attractive topic in geosciences to assist investigation of areas at tsunami risk. In this paper, a method for coupling virtual globes with tsunami wave arrival time models is presented. In this process we have shown 2D+Time of tsunami waves for propagation and inundation of tsunami waves, both coastal line deformation, and the flooded areas. In addition, the worst case scenario of tsunami on Chabahar port derived from tsunami modelling is also presented using KML on google earth.
Highlights
Tsunami is one of the most important marine hazards generally triggered by earthquakes and/or submarine/subaerial landslides
This paper has considered 2D+T for tsunami wave, spatiotemporal visualization of the following: 1- Coastal line temporal visualization 2- Temporal of the propagation and Inundation tsunami waves visualization
Spatiotemporal data sets are often very large and difficult to analyse and display. They are fundamental for decision making to support disaster management strategy as it allows for better disaster mitigation and preparation
Summary
Tsunami is one of the most important marine hazards generally triggered by earthquakes and/or submarine/subaerial landslides. The speed of tsunami waves depends on the depth of water, so that the waves undergo acceleration and deceleration in passing over an ocean bottom of varying depth. In the deep and open ocean, the tsunami wave travel at speeds of 500 to 1000 km/hr In the open ocean, the height of the waves is generally about 30 to 40 cm even for the most destructive distant tsunami, and so the waves pass unnoticed. The propagation of tsunami wave from the deep water undergoes change, causing increase in the wave height at the coast due to the nearshore bathymetry and coastal morphology (Titov and Synolakis, 1997). An inundation model takes the deep ocean tsunami and calculates how the wave shoals and runs up onto dry land (Dominey et al, 2006). Inundation modeling requires highly detailed bathymetry and knowledge of physical properties such as basal friction
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