Runup of Tsunami Waves in U-Shaped Bays

Didenkulova, Ira; Pelinovsky, Efim

doi:10.1007/s00024-010-0232-8

Cited by 64 publications

(69 citation statements)

References 40 publications

(48 reference statements)

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“…It is possible to find accurate solutions describing nonlinear wave runup on the shores of narrow bays and straits within the framework of shallow water channel theory [9][10][11]. Moreover, it is shown that this theory explains the dynamics of freak waves on the shore and correlates well with their observations [12].…”

Section: Introductionmentioning

confidence: 75%

Wave Dynamics in the Channels of Variable Cross-Section

Pelinovsky¹,

Didenkulova²,

Shurgalina³

2017

PhO

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Dynamics of long sea waves in the channels of variable depth and variable rectangular cross-section is discussed within various approximations -from the shallow water equations to those of nonlinear dispersion theory. General approach permitting to find traveling (non-reflective) waves in inhomogeneous channels is demonstrated within the framework of the shallow water linear theory. The appropriate conditions are determined by solving a system of ordinary differential equations. The so-called self-consistent channel in which the width is connected with its depth in a specific way is studied in detail. Within the linear theory of shallow water, a wave does not reflect from the bottom irregularities. The wave shape remains unchanged on the records of the wave gauges (mareographs) fixed along the channel axis, but it varies in space. Nonlinearity and dispersion lead to the wave transformation in such a channel. Within the framework of the shallow water weakly nonlinear theory, the wave shape is described by the Riemann solution, and the wave breaks (gradient catastrophe) quicker in the zones of decreasing depth. The modified Korteweg -de Vries equation describing evolution of a solitary wave of weak but finite amplitude in a self-consistent channel, the depth of which can vary arbitrary, is derived. Some examples of a solitary wave transformation in such a channel are analyzed (particularly, a soliton adiabatic transformation in the channel with the slowly varying parameters, and a solitary wave fission into the group of solitons after it has passed the zone where the depth changes abruptly. The obtained solutions extend the class of those represented earlier by S.F. Dotsenko and his colleagues.

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Section: Introductionmentioning

confidence: 75%

Wave Dynamics in the Channels of Variable Cross-Section

Pelinovsky¹,

Didenkulova²,

Shurgalina³

2017

PhO

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“…However, even relatively small icebergs have the potential to generate large tsunamis, especially where the seabed bathymetry and coastal topography act to amplify wave height (e.g. [17]). …”

Section: Iceberg-generated Tsunamimentioning

confidence: 99%

Sedimentary evidence for a mid-Holocene iceberg-generated tsunami in a coastal lake, west Greenland

Long

Szczuciński

Lawrence

2015

Arktos

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4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract We report sedimentological evidence for a tsunami from a coastal lake at Innaarsuit, Disko Bugt (west Greenland), which was most likely generated by a rolling iceberg. The tsunami invaded the lake c. 6000 years ago, during a period of time when relative sea level (RSL) was falling quickly because of isostatic rebound. We use the background rate of RSL fall, together with an age model for the sediment sequence, to infer a minimum wave runup during the event of c. 3.3 m. The stratigraphic signature of the event bears similarities to that described from studies of the early-Holocene Storegga slide tsunami in Norwegian coastal basins. Conditions conducive to iceberg tsunami include a supply of icebergs, deep water close to the shore, a depositional setting protected from storms or landslide tsunami, and a coastal configuration that has the potential to amplify the height of tsunami waves as water depths shallow and the waves approach and impact the coast. Future warming of polar regions will lead to increased calving and iceberg production, at a time when human use of polar coasts will also grow. We predict, therefore, that iceberg-generated tsunami will become a growing hazard in polar coastal waters, especially in areas adjacent to large, fast-flowing, marine-terminating ice streams that are close to human populations or infrastructure.

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“…They found an amplification of the wave amplitude due to the presence of the submarine canyons. In addition, Didenkulova and Pelinovsky (2011) studied the shoaling and run-up in narrow bays and canyons, concluding that when the depth varies smoothly along the channel axis, a weak reflection provides significant shoaling effects.…”

Section: Coastal Engineering 2012mentioning

confidence: 99%

The Effect of a Submarine Canyon on Tsunami Propagation in the Gulf of Arauco, Chile

Aránguiz

2012

Int. Conf. Coastal. Eng.

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The 2010 Chile tsunami affected the entire coast of the Biobio Region, where several bays were flooded, and seawater surged hundreds of meters into rivers. However, no inundation occurred in the 2km wide Biobio River, located at the northern entrance of the Gulf of Arauco. Likewise, minimal inundation (less than 2m) was found on the gulf’s eastern coast, just south of the river mouth. The study was done by means of numerical simulation with TUNAMI code. Four (4) nested grids with 81”, 27”, 9” and 3” resolution were defined. Several scenarios were simulated, including the 1730, 1835, 1960 and 2010 events. The first two scenarios considered only a uniform rupture zone, while the others were defined using non-uniform initial condition. Another set of simulations were run without the presence of the island and with a modified bathymetry, so that its effect on tsunami propagation could be studied. It can be concluded that the Biobio canyon is very important in tsunami propagation in the Gulf of Arauco. There is a mitigation effect on the eastern side of the Gulf due to the refraction and dispersion generated by its presence. The change in wave direction is enhanced due to wave diffraction generated by the Santa María Island, causing the wave fronts to move in a north-south direction, preventing severe damage to the eastern side. However a direct impact of the tsunami in the southern end of the Gulf can be observed.

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Runup of Tsunami Waves in U-Shaped Bays

Cited by 64 publications

References 40 publications

Wave Dynamics in the Channels of Variable Cross-Section

Wave Dynamics in the Channels of Variable Cross-Section

Sedimentary evidence for a mid-Holocene iceberg-generated tsunami in a coastal lake, west Greenland

The Effect of a Submarine Canyon on Tsunami Propagation in the Gulf of Arauco, Chile

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