2023 Volume 79 Issue 17 Article ID: 23-17028
Volcanic activity, such as the collapse of Krakatau volcano in 2018, requires calculations that consider various possibilities, as it is difficult to estimate the collapse slip surface and the resulting sediment as part of a predictive study. In this context, a numerical model that accurately represents volcanic mountain collapse needs to accurately portray landslides and tsunami propagation, while also introducing a simple method with low computational cost. This study aimed to investigate the feasibility of using two methods to reproduce the mountain collapse of Krakatau volcano: a two-layer flow model based on non-linear long-wave theory and a simplified method of modeling. The results of the reproduction calculations showed that the analysis using the two-layer flow model demonstrated high reproducibility in the vicinity of the volcano, while the analysis using the simplified method was sufficiently accurate in the coastal area of the Sunda Strait. These results suggest that the two-layer flow model and the simplified method can be used to predict and reproduce mountain collapse phenomena.
