TSUNAMI RUN-UP MODELLING IN COMPARISON WITH COASTAL VULNERABILITY MAPPING

Abstract

Tsunami disaster mitigation is essential to reduce the possibility of negative impacts on human life by using ecologically acceptable alternatives. In line with the mitigation efforts, it is essential to focus on strategies such as reducing the risk of casualties and planning for coastal development. An effective method includes the implementation of coastal risk mapping for tsunami disasters. Therefore, this study aimed to determine the propagation and run-up modeling of tsunami waves, as well as evaluate the timing and extent of inundation, and identify affected areas, providing basic information for mapping tsunami risk and vulnerability. Geospatial analysis adopting stacking methods with integrated weighting was applied, using physical topography data as a basis. The results showed that the fault from the earthquake scenario, triggering a tsunami, led to elevated water levels in the southern area. This was attributed to the upward orientation of the fault in the southern area, causing higher waves. Specifically, wave height in the southern area reached a maximum of 8 meters, with the minimum wave value recorded at -4. Tsunami modeling presented a height of 22 meters, resulting in a run-up affecting an area of 965.96 Ha. In conclusion, this study provided an important contribution to the development of the basic theory related to the tsunami risk and vulnerability model.