Three-dimensional experiments on landslide generated waves at a sloping coast

Risio, Marcello Di; Bellotti, Giorgio; Panizzo, A.; Girolamo, Paolo De

doi:10.1016/j.coastaleng.2009.01.009

Cited by 80 publications

(60 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was in 14 cases at the second wave, in three cases at the third wave and in one case at the fourth wave measured. Similar observations are described in Lynett and Liu (2005) and Di Risio et al (2009a;. The present study further confirms that the maximum onshore wave sometimes increases with r/h, reaches a maximum, and then decreases with r/h (Lynett and Liu, 2005;Di Risio et al, 2009a;.…”

Section: Appendix C: Lateral Onshore Wave Run-upsupporting

confidence: 79%

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

111

119

View full text Add to dashboard Cite

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...

show abstract

Section: Appendix C: Lateral Onshore Wave Run-upsupporting

confidence: 79%

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

111

119

View full text Add to dashboard Cite

show abstract

“…In order to reconstruct the landslide motion a capacitive accelerometer (Metra-Mess CB41) has been placed inside the landslide to measure its acceleration. For a description of landslide motion see Di Risio et al (2009a) and Di Risio et al (2009b). Here it is worth to mention that the impact velocity measured in the experiments ranged between 0.85 and 1.20 m/s.…”

Section: Description Of the Physical Model Experimentsmentioning

confidence: 99%

“…The landslide model has a regular shape that reproduces a half of an ellipsoid (also used by Di Risio et al, 2009b) that, in a reference frame with the origin placed at the center of the ellipsoid, can be described by the equation x 2 /a 2 +y 2 /b 2 +z 2 /c 2 = 0. Then the landslide width is equal to 0.40 m (axis a parallel to the undisturbed shoreline equal to 0.20 m), the landslide length to 0.80 m and the landslide thickness to 0.05 m for a total volume V = 0.0084 m 3 .…”

Section: Description Of the Physical Model Experimentsmentioning

confidence: 99%

Feasibility of Tsunami Early Warning Systems for small volcanic islands

Bellotti

Risio

Girolamo

2009

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. This paper investigates the feasibility of Tsunami Early Warning Systems for small volcanic islands focusing on warning of waves generated by landslides at the coast of the island itself. The critical concern is if there is enough time to spread the alarm once the system has recognized that a tsunami has been generated. We use the results of a large scale physical model experiment in order to estimate the time that tsunamis take to travel around the island inundating the coast. We discuss how and where it is convenient to place instruments for the measurement of the waves.

show abstract

“…Such a slide moves offshore as a rigid body, its centre being initially at x = x g . Since the slide is thin and the slope is mild, the uniformly accelerated motion of the slide down the incline is approximated as a uniform motion with constant speed u g (Di Risio et al 2009a;Renzi and Sammarco 2012). Vertical cross sections of the double Gaussian slide are shown in the parametric plots of Fig.…”

Section: State Of the Art Of Landslide Tsunami Modellingmentioning

confidence: 99%

“…The latter is responsible for tsunami devastation along the beach. The model results of Renzi and Sammarco (2012) were further compared with the experimental data of Di Risio et al (2009a) Table 1). Figure 4 shows the time series of the tsunami (ζ ) generated by the landslide at two different points along the shoreline.…”

Section: State Of the Art Of Landslide Tsunami Modellingmentioning

confidence: 99%

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

Renzi

Sammarco

2016

Landslides

View full text Add to dashboard Cite

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.

show abstract

Three-dimensional experiments on landslide generated waves at a sloping coast

Cited by 80 publications

References 31 publications

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

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

Feasibility of Tsunami Early Warning Systems for small volcanic islands

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

Contact Info

Product

Resources

About