Abstract

The threat of tsunami on the coastal region of Bang ladesh has emerged after the Great Indian Ocean ear thquake in 2004. Previously, it was thought that Bangladesh is beyond the threat of tsunami but the devastating Indian Ocean tsunam i has raised the need for assessing tsunami risk on Bangladesh coast, since a bout 32 percent of the people live in these areas. A number of geological faults have been identified in the vicinity of Bay of Beng al; which are currently being considered for potent ial sources of underwater earthquake. For this study, the guidelines from Int ergovernmental Oceanographic Commission (IOC) is fo llowed which includes assessing the hazard, vulnerability and final risk due to tsunami. GIS analysis was performed on the t sunami hazard map to find the ultimate risk. From the analysis it was found that a minimum of about 60 percent of people in the shel ter units which are susceptible to potential inundation are at risk to lose their lives. With rise of inundation heights, the percenta ge of possible loss of people also rises accordingly. Again a night-time tsunami poses more threat to people than a day-time tsunami. It was focused to combine the results of hazard, vulnerability and risk assessmen t for a community in the coastal belt of Bangladesh .

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