Abstract
A tsunami can cause considerable loss of life, extreme property damage and infrastructure destruction. A tsunami run-up simulation can be used to forecast wave generation caused by an earthquake. This study aims to assess the tsunami-affected inundated area on the west coast of Lampung province using geospatial analysis-based tsunami run-up simulation. The parameters used in the assessment were applied elevation and slope computed from Aster GDEM, coastline distance determined from a vector map and tsunami inundation obtained by Hills and Mader equation and vegetation density calculated from ALOS ANVIR-2 image. The AHP process was applied for weighing the parameter through a pair-wise comparison using four iterations of the normalised matrix. Five classes of vulnerability were defined and analysed for the tsunami inundation mapping. Weighted overlay through spatial analyst in GIS was used to draw the final map of tsunami vulnerability. The assessment result indicates that 11.26 square kilometre of the study area falls under the high tsunami vulnerability zone and 6.6 square kilometres of the building area comes under the inundation area. The results presented in this study may facilitate improvements in basic data for city planning related to evacuation processes and management strategies during disasters.
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