Article
Multidisciplinary Sciences
Manon Robbe-Saule, Cyprien Morize, Yann Bertho, Alban Sauret, Anthony Hildenbrand, Philippe Gondret
Summary: Modeling tsunami waves generated by subaerial landslides is crucial for accurate hazard and risk assessments in coastal areas. Small-scale laboratory experiments show a strong correlation between the amplitude of generated waves and the volume of grains, offering a reliable way to estimate the amplitudes of paleo-tsunamis. Despite differences in scale and geometry, there is a good agreement between experimental laws and field data.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Multidisciplinary
Ikha Magdalena, Kemal Firdaus, Devina Jayadi
Summary: This research investigates the generation of damaging tsunami waves by submarine landslides and estimates their maximum height using a mathematical model. Validation tests show that the numerical scheme accurately predicts the maximum tsunami wave amplitude.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Mechanics
Kai-Li Zhao, Liu-Chao Qiu, Yi Liu
Summary: A computational model based on the two-layer two-phase material point method (MPM) is developed in this study to simulate tsunamis generated by granular landslides. The model successfully captures the soil-water interaction, large deformation of soil, and fluidization and sedimentation of sand. By simulating benchmark problems and comparing the computed results with analytical solutions and laboratory test data, the effectiveness of the proposed model is verified. Additionally, the influence of different soil material parameters on the water wave generated by subaerial granular landslides is investigated.
Article
Engineering, Geological
Cheng-Hsien Lee, Zhenhua Huang
Summary: This study uses a multi-phase flow model to examine impulsive waves generated by collapse of steep slopes into water bodies. The effects of slope erodibility on landslide motion and resulting waves are investigated by comparing rigid and erodible slopes. Key parameters related to impulsive wave generation, such as wave elevation, granular flow characteristics, and energy distribution, are examined in the study.
Article
Geosciences, Multidisciplinary
Jorge Macias, Cipriano Escalante, Manuel J. Castro
Summary: The study aims to propose a numerical tool benchmarked by NTHMP for assessing landslide-generated tsunami hazards. The Multilayer-HySEA model is validated using laboratory data and applied to granular slides. The results demonstrate the effectiveness of using the multilayer model to deal with tsunamis generated by granular slides.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2021)
Article
Engineering, Geological
Abderrahmane Mahallem, Mohamed Roudane, Abdelkader Krimi, Sid Ahmed Gouri
Summary: This study aims to develop a Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) in-house code for modelling landslide-water interaction problems. A new constitutive law is proposed to handle both landslide and water dynamics behavior to ensure strong and natural coupling between the two phases. The validation of the code shows good agreements between numerical results and reference data.
Article
Engineering, Geological
Wangcheng Zhang, Alexander M. Puzrin
Summary: This study establishes a time-efficient numerical model for simulating the entire evolution of submarine landslides, including pre-failure shear band propagation, slab failure, and post-failure dynamics, with detailed investigations on shear band propagation and slab failure.
Article
Engineering, Geological
Saba Gharehdash, Bre-Anne Louise Sainsbury, Milad Barzegar, Igor B. Palymskiy, Pavel A. Fomin
Summary: The DS-SPH method is developed for quantifying explosion-generated crack densities, addressing deficiencies of conventional SPH and improving efficiency through GPU parallelization.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Environmental Sciences
Can Huang, Chao Hu, Yi An, Chuanqi Shi, Chun Feng, Huaning Wang, Qingquan Liu, Xiaoliang Wang
Summary: This work presents an improved soil-water coupling model to simulate landslide-generated impulse waves (LGIWs) using smoothed particle hydrodynamics (SPH). The model is capable of large-scale simulation and high-resolution modeling for three-dimensional LGIW problems. Through simulation of a subaerial landslide-generated water wave and the Huangtian LGIW, the model demonstrates accuracy and ability in reproducing the entire disaster chain.
WATER RESOURCES RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Matthew W. Hayward, Colin N. Whittaker, Emily M. Lane, William L. Power, Stephane Popinet, James D. L. White
Summary: This paper validates a non-hydrostatic multilayer method for studying tsunami hazards associated with underwater explosions. The numerical method accurately reproduces observed wave characteristics and identifies the relationship of extended initial troughs for negative disturbances. This research provides the foundation for future rigorous probabilistic hazard assessments.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2022)
Article
Geography, Physical
J. M. Carey, J. J. Mountjoy, G. J. Crutchley, D. N. Petley, C. F. Holden, Y. Kaneko, K. Huhn
Summary: Although subaqueous slopes on active continental margins can have different failure styles, the movement mechanisms during earthquakes are poorly understood due to limited direct sampling of submarine landslides for detailed investigation. This study conducted dynamic shear experiments on samples recovered from the Tuaheni Landslide Complex off the coast of New Zealand to explore its behavior during earthquakes. The experiments suggest that episodic landslide movement can occur through basal sliding when pore water pressures increase, leading to a lower shear zone effective stress. This provides a credible mechanism for subaqueous landslides on low angled shear zones to undergo episodic movement during earthquakes without catastrophic failure.
Article
Engineering, Multidisciplinary
Congfang Ai, Yuxiang Ma, Changfu Yuan, Zhihua Xie, Guohai Dong
Summary: The 3D non-hydrostatic model has been extended for simulating submarine-landslide-generated waves, successfully capturing a wide range of scenarios with good agreement between numerical and experimental data. This model proves to be an efficient alternative for simulating submarine-landslide-generated waves.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Engineering, Geological
Pauline Kaminski, Thore Sager, Juergen Grabe, Morelia Urlaub
Summary: The destructive potential of submarine landslides for populated coastal areas and maritime infrastructure has been recognized. The geological processes triggering such events have not been fully established, requiring quantification of slope stability. A universally adaptable methodology for identifying triggering mechanisms has been successfully applied to marine gas occurrence.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Ocean
Cristian Yair Soriano Camelo, Maria Cascao Ferreira de Almeida, Marcio de Souza Soares de Almeida, Gopal S. P. Madabhushi, Brian Carlton
Summary: This paper investigates the seismic response of gentle submarine slopes in the offshore Campos Basin in Brazil to small-to-moderate-sized earthquakes. Numerical modeling results show that permanent displacements and shear strains can accumulate even for small slope angles and moderate earthquakes, which can affect the stability and performance of existing offshore infrastructures. The findings provide valuable reference for predicting seismic displacements, shear strains, and seabed amplification or attenuation in similar deep-water deposits.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Zi-Fei Meng, A-Man Zhang, Ping-Ping Wang, Fu-Ren Ming
Summary: A shock-capturing scheme based on smoothed particle hydrodynamics (SPH) is proposed to investigate compressible flows with strong discontinuities, involving shocks, rarefaction waves, and contact discontinuities. The scheme utilizes Roe's approximate Riemann solver and a novel limiter to capture shocks, eliminates tunable artificial viscosity, corrects the gradient operator in the continuity equation through a renormalization procedure, and adopts equal spacing particle distribution for easier modeling of multidimensional problems. The scheme has been verified through benchmark tests, including the simulation of contact discontinuities, extreme shock waves, and strong rarefaction waves.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)