Estimating maximum initial wave amplitude of subaerial landslide tsunamis: A three-dimensional modelling approach

IF 3.1 3区地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES

Ocean Modelling Pub Date : 2024-03-13 DOI:10.1016/j.ocemod.2024.102360

Ramtin Sabeti , Mohammad Heidarzadeh

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引用次数: 0

Abstract

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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估算陆下滑坡海啸的最大初始波幅：三维建模方法

近年来，滑坡海啸造成了成千上万人的死亡和重大损失，因此有必要分配足够的时间和资源来研究这些极端自然灾害。本研究通过开展大量三维数值实验，并通过物理测试进行验证，为该领域的研究提供了一个新的突破口，从而为亚高空滑坡引发的海啸的最大初始振幅建立了一个预测方程。我们首先在波浪盆地进行了一些三维物理实验，然后应用这些实验验证了基于 Flow3D-HYDRO 软件包的三维数值模型。因此，我们使用验证过的模型，通过改变滑坡体积、水深、坡角和移动距离等参数，进行了 100 次模拟。随后，我们利用这个庞大的数据库建立了海啸最大初始振幅的预测方程。在建立预测方程时，我们首次将移动距离作为一个独立参数来考虑，这可以显著提高预测精度。该预测方程在 2018 年喀拉喀托亚高山泥石流海啸案例中进行了测试，结果令人满意。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ocean Modelling 地学-海洋学

CiteScore

5.50

自引率

9.40%

发文量

审稿时长

19.6 weeks

期刊介绍： The main objective of Ocean Modelling is to provide rapid communication between those interested in ocean modelling, whether through direct observation, or through analytical, numerical or laboratory models, and including interactions between physical and biogeochemical or biological phenomena. Because of the intimate links between ocean and atmosphere, involvement of scientists interested in influences of either medium on the other is welcome. The journal has a wide scope and includes ocean-atmosphere interaction in various forms as well as pure ocean results. In addition to primary peer-reviewed papers, the journal provides review papers, preliminary communications, and discussions.