11:45 AM - 12:00 PM
[HDS11-05] The Worst Case on Simulation of Tsunami Triggered by Anak Krakatau Volcano Collapse for Decision Support System
Keywords:tsunami, volcano, landslide, simulation, Anak Krakatau, worst scenario
This paper addresses the critical issue—the worst-case simulation—of the volcanic tsunami hazard posed by Anak Krakatau Volcano (AKV) in the Sunda Strait region of Indonesia. The volcanic islands in Indonesia, particularly those with active volcanoes, are susceptible to generating tsunamis, impacting coastal communities. The infamous Krakatoa eruption in 1883 serves as a historical example, causing significant loss of life and highlighting the need for proactive measures. The study focuses on the December 22, 2018, event where a destructive tsunami, triggered by a volcanic eruption, claimed over 400 lives and caused extensive damage. AKV, a progeny of the Krakatoa eruption, is identified as a potentially tsunamigenic volcano, raising concerns for the Sunda Strait region's future vulnerability to similar incidents. The paper emphasizes the importance of modeling and simulating the worst-case scenario for the collapse (landslide) of AKV considering in many scenarios various parameters such as volume, thickness, length, and width. The objective is to provide strategic information for decision-making support in Banten and Lampung Provinces, two major regions at risk. The expected output of the study is crucial for shaping risk management policies, including the evacuation method and the establishment of safe boundaries for settlements and residents. Additionally, it informs future regional development plans, ensuring the incorporation of proactive measures to mitigate the impact of potential volcanic tsunamis. The insights gained from this research are instrumental in challenging and reshaping traditional understandings of tsunami hazards, warning systems, and response mechanisms in volcanic island settings.