Preprints
https://doi.org/10.5194/egusphere-2023-3021
https://doi.org/10.5194/egusphere-2023-3021
25 Jan 2024
 | 25 Jan 2024

Tsunami Vulnerability Mapping of Coastal Areas to Confront the Banda Detachment Tsunami (Case Study at Tual City)

Viona Dika Rikumahu

Abstract. Tsunami is a natural disaster that is most feared by humans, especially for people who live in coastal areas that are directly adjacent to seismically active seas in Indonesia. Dullah Island in Tual City is located in a coastal area directly adjacent to the Banda Sea, making this area have a high level of tsunami hazard. The Banda Sea is known as an active sea that emits earthquake energy, both those that do not have the potential to cause a tsunami. The existence of previous research on the run-up height of tsunami waves in Tual City makes it important to study the characteristics of the Tual City area to formulate disaster mitigation-based planning using the GIS (Geographic Information System) based qualitative spatial analysis method with variables of slope, height of the area, distance from the coastline, and land use. The high level of tsunami hazard and extremely high population exposure considering that the majority of the population in the coastal area lives on the coast, it is important to study the characteristics of the region to formulate disaster mitigation-based planning to create a Build Back Better region and community.

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Viona Dika Rikumahu

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Viona Dika Rikumahu
Viona Dika Rikumahu

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Short summary
The high level of tsunami vulnerability is also influenced by the slope, the height of the area, and the shape of the city of Tual like a crab claw where the location of the bay on the north and south sides of the area is able to accommodate the energy of the tsunami waves released. The location of the city of Tual is surrounded by oceans, especially the western and northern parts which are surrounded by the Banda Sea, where the Banda Sea is one of the most sismically active seas in Indonesia.