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Sabeti, Ramtin; Heidarzadeh, Mohammad
Ocean modelling (Oxford), June 2024, 2024-06-00, Letnik: 189Journal Article
•Landslide travel distance is considered for the first time in a predictive equation.•Predictive equation derived from databases using 3D physical and numerical modeling.•The equation was successfully tested on the 2018 Anak Krakatau tsunami event.•The developed equation using three-dimensional data exhibits a 91 % fitting quality. Landslide tsunamis, responsible for thousands of deaths and significant damage in recent years, necessitate the allocation of sufficient time and resources for studying these extreme natural hazards. This study offers a step change in the field by conducting a large number of three-dimensional numerical experiments, validated by physical tests, to develop a predictive equation for the maximum initial amplitude of tsunamis generated by subaerial landslides. We first conducted a few 3D physical experiments in a wave basin which were then applied for the validation of a 3D numerical model based on the Flow3D-HYDRO package. Consequently, we delivered 100 simulations using the validated model by varying parameters such as landslide volume, water depth, slope angle and travel distance. This large database was subsequently employed to develop a predictive equation for the maximum initial tsunami amplitude. For the first time, we considered travel distance as an independent parameter for developing the predictive equation, which can significantly improve the predication accuracy. The predictive equation was tested for the case of the 2018 Anak Krakatau subaerial landslide tsunami and produced satisfactory results.
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