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Anshari, Erwin
Jurusan Teknik Pertambangan, Fakultas Ilmu Dan Teknologi Kebumian, Universitas Halu Oleo, Jalan H.E.A. Mokodompit Kampus Hijau Bumi Tridharma Anduonou Kendari, 93132, Sulawesi Tenggara, Indonesia
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Journal : Journal of Geoscience, Engineering, Environment, and Technology

 1 
Estimation of Tsunami Arrival Time and Run-up Height Using The Cornell Multi-Grid Coupled Tsunami Model (COMCOT) at Ujung Bulu and Bira Beaches, Bulukumba Regency, Indonesia Chaerul, Muhammad; Muh. Imran Tahir; Anshari, Erwin
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 1 (2026): JGEET Vol 11 No 01 : March (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.1.24759

Abstract

This study aims to estimate tsunami arrival times and wave heights at Ujung Bulu Beach and Bira Beach, Bulukumba Regency, using numerical simulations with the Cornell Multi-grid Coupled Tsunami Model (COMCOT). Two potential tsunamigenic earthquake scenarios were considered: the West Nusa Tenggara segment of the Flores Back-Arc Thrust (Mw 7.5) affecting Ujung Bulu District, and the eastern segment of the Selayar Fault (Mw 7.2) impacting Bira Beach in Bontobahari District.Modeling results indicate that tsunami arrival times at Ujung Bulu range from approximately 46 minutes at the coastline to 56 minutes inland, with modeled wave heights varying between 0.02 and 1.96 m. In contrast, Bira Beach experiences significantly shorter arrival times, ranging from 3 to 6 minutes, with wave heights between 0.10 and 10.00 m. The reported tsunami heights represent the maximum modeled water surface elevation above mean sea level at each location.These results highlight the near-field tsunami hazard at Bira Beach and the moderate but widespread inundation potential in Ujung Bulu District. The findings provide important implications for disaster risk reduction in Bulukumba Regency, including improvements in early warning dissemination, evacuation planning, and community preparedness. Nevertheless, the results are subject to uncertainties associated with earthquake source parameterization, bathymetric resolution, and numerical modeling assumptions.
Co-Authors Abd. Hadid Rahman Ulfa Abd. Hadid Rahman Ulfa Abubakar Abubakar Ahmad Hidayat Aksara, L.M. Bahtiar Ali Okto Alrum Armid Ambarsari, Ika Sartika Ambarsari, IkaSartika Arif Setiawan Asri Arifin Awaliah Nafiu, Wd Rizky Awaliah Nafiu, Wd. Rizky Awaliah, Wd Rizky Awaliah, Wd. Rizky Dandy Ashari Daniyatno Daniyatno Deniyatno Deniyatno Deniyatno, Deniyatno Firdaus Firdaus Firdaus Firdaus Firdaus Firdaus Firdaus Firdaus Fitra Saleh Hardiyanti Hakim Harisma Buburanda, Harisma Harziman Ningrat Hasria Hasria Hasria Hasria Hasria Hasria, Hasria Ika Sartika Ambarsari Irfan Saputra Isnaen Muhidin, Moh. Ita Juita, Ita Jamhir Safani Jaya, Rio Irhan Mais Cendra Jufri Karim La Ode Nafiu Marwan Zam Mili Marwan Zam Mili Marwan Zam Mili Marwan Zam Mili Marwan Zamili Masri Masri Masri Masri Mili, Marwan Zam Moh. Suriyaidulman Rianse Mohammad Suriyaidulman Rianse Muh. Imran Tahir Muh. Nuzul Khaq Muhammad Chaerul Muhammad Ichsanul Akbar Natsir Muhammad Ilham Kadar Muhammad Ilham Kadar Muhammad Taupan Muhammad Yasser Arsy Akbar Muhardi Mustafa Muliddin Nafiu, WD Rizky Awaliah Nento, Sartan Nopri Asharun Oksteming, Jenly Okto, Ali Olii, Muhammad Ramdhan Passaly, Thegar Aditya Rachman, Ranno Marlany Rahman Rahman Rasmita, Riza Restele, La Ode Rezky, Tri Binajaya Rianse, Mohammad Suriyaidulman Ririn Pakaya Riza Rasmita Rizal Adi Saputra Rizky Awaliah N, Wd. Sarfin.L, Wiil Suparwi Suparwi Tri Utomo Taliding Tri Utomo Taliding Ulfa, Abd. Hadid Rahman Wahab Wahab Wahab Wahab Wahab Wahab Yayat Iman Supriyatna Yayat Iman Supriyatna Zam Mili, Marwan Zeth Yoseptian Batupadang Zulkifli Zulkifli