PEMODELAN NUMERIK TSUNAMI UJUNG KULON MENGGUNAKAN MEKANISME MEGATHRUST

• Main Author: Karim Arrasyid, Ekselutomo
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/48275
• Institution: Institut Teknologi Bandung

Tsunami is a wave or series of waves generated suddenly dislocation of the air column. Tsunami hazards are generally caused by volcanic eruptions under the sea, central earthquakes in the sea and collisions between oceanic plates. The high potential of tsunami disasters in the territory of Indonesia makes Indonesia one of the countries most vulnerable to tsunami disasters. This is due to the dynamics of geological systems or processes and plate movements in Indonesia, as it is located on three plates, namely Indo-Australian, Eurasian and Pacific plates. A tsunami cannot be prevented but its impact can be reduced through the use of early warning technology that is able to help people avoid potential tsunamis. Tsunami modeling is part of tsunami early warning technologies. Tsunami model is one of the long wave models developed with the aim of mapping disaster-prone areas based on estimated tsunami generation, estimated tsunami’s arrival time, runoff height and inundation. This final project reports research on the potential for tsunamis in the Ujung Kulon National Park area, the only habitat for Javan rhinos. The study was conducted using the COMCOT (Cornell Multi-grid Coupled Tsunami model) tsunami model using the megathrust mechanism and two tsunami generation scenarios. Data is taken from the Geospatial Information Agency. It was found for scenario 1 that, Kalajeten was the area with the earliest tsunami wave arrival time, at 3 minutes and Cikarang was the area with the highest tsunami wave height, which was 14.5 meters above sea level. Cikarang also became the area that experienced the deepest inundation, which is 25 meters as well as the area that experienced the farthest tsunami submergence range, which is 5.1 kilometers. For scenario 2, on the other hand, the earliest arrival time of tsunami wave occurred in Citerjun at 28 minutes and the highest tsunami wave occurred at Cikeusik with a maximum height of 2.6 meters. In addition, Cibandowoh became the region that experienced the deepest inundation, which is 9 meters, while Cigenter became the area that experienced the farthest tsunami inundation range, which is 1.4 kilometers. Compared to the Javan rhino population map, it was concluded that the obtained tsunami inundation area covered all the habitat areas of the Javan rhino, areas with high, medium, or low populations. The tsunami disaster can be a source of extinction of the Javan rhino.