Experiments on tsunami induced boulder transport – A review

Oetjen, Jan; Engel, Max; Schüttrumpf, Holger

doi:10.1016/j.earscirev.2021.103714

Cited by 9 publications

(2 citation statements)

References 54 publications

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“…Therefore, a part of the kinetic obtained from the debris flow of the cuboid and rhombohedron boulders used to overcome the acting of its gravity, thus reducing the kinetic energy obtained in the horizontal direction. This is also an important reason for their small moving distance [31,57]. These simulation results are essentially consistent with the field research of Hu et al [19] that most of the boulders in the accumulation area are cuboid and rhombohedron boulders.…”

Section: Influence Of Shapesupporting

confidence: 90%

Numerical Simulation of Boulder Fluid–Solid Coupling in Debris Flow: A Case Study in Zhouqu County, Gansu Province, China

Wang

Chen

et al. 2022

Water

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Boulders mixed with debris flows roll downstream under interactions with debris flow slurry, which poses a great threat to the people, houses, bridges, and other infrastructure encountered during their movement. The catastrophic debris flow in Zhouqu County, which occurred on 7 August 2010, was used as an example to study the motion and accumulation characteristics of boulders in debris flows. In this study, a fluid–solid coupling model utilizing the general moving objects collision model and the renormalization group turbulent model was used in the FLOW-3D software, treating boulders with different shapes in the Zhouqu debris flow as rigid bodies and the debris flow as a viscous flow. Numerical simulation results show that this method can be used to determine the motion parameters of boulders submerged in debris flows at different times, such as the centroid velocity, angular velocity, kinetic energy, and motion coordinates. The research method employed herein can provide a reference for studying debris flow movement mechanisms, impact force calculations, and aid in designing engineering control structures.

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Section: Influence Of Shapesupporting

confidence: 90%

Numerical Simulation of Boulder Fluid–Solid Coupling in Debris Flow: A Case Study in Zhouqu County, Gansu Province, China

Wang

Chen

et al. 2022

Water

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“…This effect can be considered using the model of . The boulder shape controls the boulder transport distance (Oetjen et al, 2020(Oetjen et al, , 2021, and the flatness Index of the boulder is considered a crucial parameter for boulder transport (Oetjen et al, 2021). The model of also includes these effects.…”

Section: Numerical Simulation Model Of Boulder Transport By Tsunami/s...mentioning

confidence: 99%

A Numerical Modeling Approach for Better Differentiation of Boulders Transported by a Tsunami, Storm, and Storm‐Induced Energetic Infragravity Waves

Watanabe,

Goto,

Roeber

et al. 2023

JGR Earth Surface

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Coastal boulders are often indicators of past extreme wave events. In fact, the coastal boulder distribution induced by infragravity‐dominated storm waves (energetic IG waves) may be similar to that induced by tsunamis; however, this assumption is yet to be investigated. We show that the factors responsible for generating energetic IG waves under storm scenarios are not identical to those affecting the boulders' transport distances. Our results indicate that the storm waves typically only transport boulders over short distances as compared to boulders deposited by tsunamis, even when energetic IG waves are being generated. When the dimensionless transport distance of a boulder (=transport distance of a boulder/offshore wave height) is less than 4.0 × 10 over planar topography and 3.0 × 10 over reef topography, both waves can potentially be responsible for the transport distance. In this case, whether a reasonably‐sized storm or tsunami can explain a boulder location in a study area should be investigated through detailed numerical modeling. We found a clear relationship between the dimensionless transport distance of tsunami boulders and the Iribarren number, and it is plausible to directly estimate offshore wave height or wavelength from the tsunami boulder distribution and beach slope without numerical simulation.

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Discovery of imbricated beachrock deposits adjacent to the Java trench, Indonesia: influence of tsunami and storm waves, and implications for mega-thrust earthquakes

Harris,

Meservy,

Sulaeman

et al. 2024

Nat Hazards

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Experiments on tsunami induced boulder transport – A review

Cited by 9 publications

References 54 publications

Numerical Simulation of Boulder Fluid–Solid Coupling in Debris Flow: A Case Study in Zhouqu County, Gansu Province, China

Numerical Simulation of Boulder Fluid–Solid Coupling in Debris Flow: A Case Study in Zhouqu County, Gansu Province, China

A Numerical Modeling Approach for Better Differentiation of Boulders Transported by a Tsunami, Storm, and Storm‐Induced Energetic Infragravity Waves

Discovery of imbricated beachrock deposits adjacent to the Java trench, Indonesia: influence of tsunami and storm waves, and implications for mega-thrust earthquakes

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