Fadly Usman, Keisuke Murakami, Tri Mulyani Sunarharum, Meutia Aisyah Nabila, Atrida Hadianti, Hijrah Saputra, Suparto Wijoyo
This study presents a numerical and spatial assessment of tsunami mitigation strategies using CADMAS-SURF 2D and ArcGIS. Two scenarios are evaluated: coastal vegetation belts and topographic elevation management. Simulation results show that vegetation buffers reduce wave velocity and run-up through frictional resistance, while elevated landforms act as physical barriers to wave propagation. Spatial analysis identifies high-risk zones and supports evacuation planning. The findings highlight the potential of hybrid mitigation strategies combining nature-based and structural approaches to enhance coastal resilience in tsunami-prone regions. Numerical simulation with vegetation belts in scenario #1 was able to reduce waves from 6 m to 2 m, while with ditch formation in scenario #2 it was able to reduce waves to only about 0.5 m at measurement point X3 (600 m). The results of GIS analysis of the coastal areas of Banyuwangi city that are vulnerable to tsunami impacts based on numerical simulations are 4.68 km2 (22.50%) in the red zone and 9.02 km2 (43.35%) in the yellow zone or at moderate risk. © 2026 Institute of Crustal Dynamics, China Earthquake Administration.
Department Urban and Regional Planning, Universitas Brawijaya, Indonesia; Engineering Faculty, University of Miyazaki, Japan; Department of Architecture and Planning, Universitas Gadjah Mada, Indonesia; Graduate Student of Urban and Regional Planning, Universitas Gadjah Mada, Indonesia; Department of Disaster Management, Postgraduate School, Universitas Airlangga, Indonesia; Doctoral Program in Law and Development, Postgraduate School Universitas Airlangga, Surabaya, Indonesia
