Jurnal Manajemen Bencana (JMB)
Vol. 9 No. 1 (2023): Jurnal Manajemen Bencana (JMB)

Determination of Paleotsunami Inundation Zone Using Finite Difference Method in Southern Coastal Lebak, Banten

Muhammad Rizqy Septyandy (Program Studi Teknik Geologi, Fakultas Teknik, Universitas Mulawarman)
Shafira Selinzaskia Anwar (Program Studi Geologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Indonesia)



Article Info

Publish Date
19 Jun 2023

Abstract

Paleotsunami deposits have been found in Indonesia, including in Pacitan, Kulon Progo, Cilacap, Pangandaran, and Sukabumi. This research aims to obtain an ideal model for determining the paleotsunami inundation zone along the southern coastal Lebak, Banten using finite difference numerical modeling through the MOST (Method of Splitting Tsunamis)-based ComMIT software. Field observations were made to identify the presence of paleotsunami deposits in the swale area on the southern coastal Lebak, Banten. Several tsunami scenarios such as Pangandaran in 2006, Indian Ocean Tsunami (IOT) in 2004, Tohoku in 2011, Sunda Strait megathrust segment, and megathrust along the south of Java were used in the modeling process to identify the characteristics of paleotsunami that were produced the tsunami deposits in the study area. Modeling is carried out using two schemes, such as using the ComMIT database unit source (subduction zone segments) and using the earthquake source parameters that are entered manually. The results show the best tsunami scenario that may have ever occurred in research area is the tsunami event with magnitude of 9.1 Mw, with maximum inundation range of 5.2 km, and run-off of up to 32 m, which is estimated as a tsunami event that precipates paleotsunami deposits in study area.

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Journal Info

Abbrev

MB

Publisher

Subject

Religion Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Other

Description

Jurnal Manajemen Bencana (JMB) publishes articles of research and conceptual thinking in the field of disaster management but not limited in: Disaster Risk Management; Disaster Risk Psychology; Geographical Information System for Disaster Management; Civil and Military Coordination in Disaster ...