Wavenumber–frequency analysis of the landslide-generated tsunamis at a conical island

Romano, Alessandro; Bellotti, Giorgio; Risio, Marcello Di

doi:10.1016/j.coastaleng.2013.06.007

Cited by 28 publications

(37 citation statements)

References 41 publications

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“…This suggests that edge-wave like components of the wave motion can be partially trapped around a conical island, leading to large runup even at locations normally sheltered from swell waves. The theoretical findings of Renzi and Sammarco (2010) were later confirmed experimentally by Romano et al (2013). By using new high-resolution experimental datasets, Romano et al (2013) found that the runup time series of landslide tsunamis around a circular island indeed contain waves resembling the 0th-order edge wave mode.…”

Section: Conical Island Modelsupporting

confidence: 56%

“…The theoretical findings of Renzi and Sammarco (2010) were later confirmed experimentally by Romano et al (2013). By using new high-resolution experimental datasets, Romano et al (2013) found that the runup time series of landslide tsunamis around a circular island indeed contain waves resembling the 0th-order edge wave mode. This result has significant practical importance, as a simple formula like the 0th order edge wave dispersion relation (Eq.…”

Section: Conical Island Modelsupporting

confidence: 56%

“…Indeed, modelling landslide tsunamis is intrinsically challenging as it involves a time-dependent bottom deformation in the same region where the waves are generated and propagate. In this paper, we shall review the analytical models of Sammarco and Renzi (2008), Renzi and Sammarco (2010) and Renzi and Sammarco (2012), which have become benchmark models for numerical codes (Romano et al 2013;Dias et al 2014;Stefanakis et al 2014) and statistical emulations (Sarri et al 2012) of landslide tsunamis. Analytical models provide an invaluable tool in the science of tsunami modelling, for they allow one to obtain a sound physical understanding of the wave dynamics and to carry out parametric investigations on the influence of the system main parameters on the maximum wave runup.…”

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confidence: 99%

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The hydrodynamics of landslide tsunamis: current analytical models and future research directions

Renzi

Sammarco

2016

Landslides

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Citation: RENZI, E. and SAMMARCO, P., 2016 Landslides manuscript No.(will be inserted by the editor)The hydrodynamics of landslide tsunamis: current analytical models and future research directions. Emiliano Renzi · Paolo SammarcoReceived: date / Accepted: date Abstract Landslide generated tsunamis are lesser-known yet equally destructive than earthquake tsunamis. Indeed, the highest tsunami wave recorded in recent history was generated by a landslide in Lituya Bay (Alaska, July 9, 1958) and produced runup in excess of 400 m. In this paper, we review the state of the art of landslide tsunami analytical modelling. Within the framework of a linearised shallowwater theory, we illustrate the dynamics of landslide tsunami generation and propagation along beaches and around islands. Finally, we highlight some intriguing new directions in the analytical modelling of landslide tsunamis to support early warning systems.

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Section: Conical Island Modelsupporting

confidence: 56%

Section: Conical Island Modelsupporting

confidence: 56%

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confidence: 99%

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The hydrodynamics of landslide tsunamis: current analytical models and future research directions

Renzi

Sammarco

2016

Landslides

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“…Such onshore wave propagation on a sloping straight coast was investigated by Liu et al (2005), Lynett andLiu (2005), Di Risio et al (2009a), Mohammed and Fritz (2012) and Seo andLiu (2013). Di Risio et al (2009b) and Romano et al (2013) conducted and analysed tests in a large-scale facility to investigate run-up at a conical island.…”

Section: Appendix C: Lateral Onshore Wave Run-upmentioning

confidence: 99%

“…12). Mohammed and Fritz (2012) and Romano et al (2013) showed that the wave celerity of edge waves may be approximated with c = /k and the zeroth mode (n = 0) of the dispersion relation given by Ursell (1952) Table 2. Wave probe locations: 7 measurement locations in 2D for both water depths Table B1.…”

Section: Appendix C: Lateral Onshore Wave Run-upmentioning

confidence: 99%

On the effect of the water body geometry on landslide–tsunamis: Physical insight from laboratory tests and 2D to 3D wave parameter transformation

Heller

Spinneken

2015

Coastal Engineering

124

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Heller, Valentin and Spinneken, Johannes (2015) On the effect of the water body geometry on landslidetsunamis: physical insight from laboratory tests and 2D to 3D wave parameter transformation. Coastal Engineering, Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/34071/1/On%20the%20effect%20of%20the%20water %20body%20geometry%20on%20landslide-tsunamis%20updated%20for %20ResearchGate.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the Creative Commons Attribution Non-commercial No Derivatives licence and may be reused according to the conditions of the licence. For more details see: http://creativecommons.org/licenses/by-nc-nd/2.5/ A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Accepted for publication in Coastal Engineering 104(10), 113-134 (doi:10.1016/j.coastaleng.2015.06.006 Abstract: Preliminary landslide-tsunami hazard assessment is commonly based on empirical equations derived from wave channel (2D) or wave basin (3D) experiments. The far-field wave in 2D can easily be an order of magnitude larger than in 3D. The present study systematically investigates the effect of the water body geometry on the wave characteristics in the near-and far-field. Subaerial landslide-tsunami tests were conducted relying upon both a 2D and a 3D physical model, undertaken with identical boundary conditions. The test parameters included two water depths, three rigid slides, as well as various slide release positions. Empirical equations for 3D offshore and laterally onshore wave properties are presented and compared with previous work. A direct comparison of the wave features reveals that the waves decay in 2D, 3D onshore and 3D offshore with x −0.30 , r −0.67 and r −1.0 , where x (2D) and r (3D) describe the distance from the impact zone. In 2D four wave types are observed, whereas only the two least non-linear types were observed in 3D. This finding is further analysed with wavelet spectra. For a large slide Froude number F, relative slide 2 thickness S and relative slide mass M, the 3D wave heights in the slide impact zone can be as large as in 2D. However, for small F, S and M, the 3D waves are considerably smaller both in the near-and far-field. A novel method is presented and validated to transform data from 2D studies to 3D. This method may have favourable implications on preliminary landslidetsunami hazard assessment.Keywords: Hazard assessment; Impulse wave; Landslide-tsunami; Physical modeling; Water waves; Wave generation. Introduction OverviewLandslide-tsunamis are generated by mass m...

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Runup of granular landslide‐generated tsunamis on planar coasts and conical islands

McFall

Fritz

2017

JGR Oceans

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Large‐scale physical model experiments of tsunamis generated by granular landslides and volcanic flank collapses are conducted to study the wave runup on both the hill slope laterally adjacent to the landslide and an opposing hill slope. A pneumatic landslide tsunami generator was deployed on planar and convex conical hill slopes to simulate deformable landslides with various geometries and kinematics. On the landslide hill slope, maximum runup and rundown were observed in the landslide impact region followed by adjacent second maxima after the lateral waves were fully formed. The runup and rundown decayed asymptotically from the second maxima. In the conical island scenario, a localized runup amplification was measured on the lee side of the island. Outside the landslide impact region, the effects of the landslide granulometry on the lateral wave runup are minimal. The lateral wave runup on the planar hill slope was generally larger than on the convex conical hill slope outside the landslide impact region. The convex conical hill slope traps less lateral wave energy. The zeroth mode of the edge wave dispersion relation matched the first and second lateral waves on the planar hill slope and the first wave on the convex conical hill slope. Predictive equations for the laterally propagating wave characteristics are derived and a method to predict the runup on an opposing hill slope is presented. The predictive wave and runup equations are benchmarked against the 2007 landslide‐generated tsunami in Chehalis Lake, British Columbia, Canada.

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Wavenumber–frequency analysis of the landslide-generated tsunamis at a conical island

Cited by 28 publications

References 41 publications

The hydrodynamics of landslide tsunamis: current analytical models and future research directions

The hydrodynamics of landslide tsunamis: current analytical models and future research directions

On the effect of the water body geometry on landslide–tsunamis: Physical insight from laboratory tests and 2D to 3D wave parameter transformation

Runup of granular landslide‐generated tsunamis on planar coasts and conical islands

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