Abstract
Cascajal's Island is an important geographic place of the Colombian Pacific, where ad ministrative facilities and infrastructure of the government and port system from the mu nicipality of Buenaventura are established. It is consider under flooding hazard due to a local tsunami from possible occurrence of a strong earthquake. Considering the regional seismic hazard, flooding scenarios are determinate to evaluate the possible height and the covered area by water at Cascajal's Island. The most critical scenario is generate by a tsunamigenic event with magnitude 8,8 Mw, generating a flooding with a height of 2,88 meters that will cover 3,32 km2 equivalents to 94,6% of the Island's total area. This result is correlated directly with the acquired data about population density and kind of economic activities as exposure elements that are susceptibles to be affected by hazard scenario. This analysis let to establish risk by the tsunamigenic flood to the populated center of Cascajal, which can be taken as an input to regional planning and as prevention and mitigation measurements on the study zone.
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