Inundation risk level tsunami in Trenggalek district, Indonesia

Basid, Abdul ORCID: https://orcid.org/0000-0003-1191-8290, Mahardika, I Ketut, Subchan, Wachju, Astutik, Sri, Rusli, Rusli, Jannah, S.D.N. and Rozikan, Rozikan (2026) Inundation risk level tsunami in Trenggalek district, Indonesia. Indonesian Journal on Geoscience, 13 (1). pp. 31-42. ISSN 1907-2953

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Abstract

The southern coast of Trenggalek District is prone to tsunami disasters, because it is located north of the megathrust zone. This study aims to map the level of tsunami inundation risk in The Trenggalek District, especially on the coast of Watulimo Subdistrict. This mapping was done with the help of Model Builder in ArcGIS software, using scenarios of tsunami wave heights on the shore of 1 m, 2 m, 5 m, 15 m, 27 m, and 30 m. The risk map of tsunami inundation was obtained by combining the tsunami hazard map with the vulnerability map. The study results show that the area of tsunami inundation at a high-altitude scenario with wave heights of 1 m has low, medium, and high- risk levels covering 0.254 km2, 0.240 km2, and 0.032 km2, respectively. In the 27 m scenario, which is the worst-case scenario according to Meteorology, Climatology, and Geophysics Agency (BMKG), the areas of inundation at low, medium, and high-risk levels reach 23.032 km2, 16.471 km2, and 7.904 km2, respectively. In this 27 m scenario, four villages in Watulimo Subdistrict are almost entirely inundated by the tsunami. The results of this study are expected to be used as the material for tsunami disaster mitigation in the Trenggalek District.

Item Type:	Journal Article
Keywords:	inundation; mapping; risk level; tsunami; Trenggalek
Subjects:	02 PHYSICAL SCIENCES > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified 02 PHYSICAL SCIENCES > 0299 Other Physical Sciences 04 EARTH SCIENCES > 0403 Geology 04 EARTH SCIENCES > 0404 Geophysics
Divisions:	Faculty of Mathematics and Sciences > Department of Physics
Depositing User:	Mr Abdul Basid
Date Deposited:	07 Apr 2026 15:00

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