HYPOTHETICAL MODELING OF TSUNAMI DUE TO VOLCANIC ACTIVITY IN THE TEON-NILA-SERUA ISLANDS MALUKU PROVINCE

• Main Author: Zakia Syahrulloh, Riyadi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/82394
• Institution: Institut Teknologi Bandung

Maluku Province is one of the provinces passed by the Pacific ring of fire, this allows the formation of volcanic clusters that have high potential danger and cause large losses. This needs to be wary of some volcanoes that have not seen activity for a long time such as Mount Laworkawra with the last eruption occurring in 1968 on Nila Island. Hypothetical analysis can be performed with numerical simulations of tsunamis to perform mitigation. Numerical simulations of tsunamis with underwater landslide plants can be investigated using the COMCOT (Cornell Multi-grid Coupled Tsunami Model) model with NSWE (Non-linear Shallow Water Equations) equations and nested domains up to 10 layers. The bathymetric data used came from IHO (International Hydrographic Organization) bathymetric data and National Topographic data (DEMNAS). The simulated scenarios amounted to five scenarios with differences in avalanche volume referring to the Teon Island 1660 tsunami event of 2.75 km3, Mount Anak Krakatu 2018 of 2.8 km3, Mount Ruang 1871 of 12 km3 and estimated landslide-prone areas around Nila Island. The results of the numerical simulation of the tsunami with the generation of an underwater landslide had the fastest propagation time of 3.5 minutes and the highest tsunami immersion height of 228 meters in the Nila Island area, while the slowest tsunami spread to Kei Kecil Island for 39 minutes with the highest tsunami immersion height of 0.32 meters. From the five scenarios, it was found that the tsunami caused by the landslide would be local and damaging in the generating area, such as Serua Island, Nila Island, and Teon Island, while relatively further areas such as Damar Island, Romang Island, Moa Island, Babar Island, Jendena Islands, and Kei Kecil Islands had lower damage than the area around the tsunami generation.