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| Titel |
Tsunami waves generated by submarine landslides of variable volume: analytical solutions for a basin of variable depth |
| VerfasserIn |
I. Didenkulova, I. Nikolkina, E. Pelinovsky, N. Zahibo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 11 ; Nr. 10, no. 11 (2010-11-30), S.2407-2419 |
| Datensatznummer |
250008508
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| Publikation (Nr.) |
 copernicus.org/nhess-10-2407-2010.pdf |
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| Zusammenfassung |
| Tsunami wave generation by submarine landslides of a variable volume in a
basin of variable depth is studied within the shallow-water theory. The
problem of landslide induced tsunami wave generation and propagation is
studied analytically for two specific convex bottom profiles
(h ~ x4/3 and h ~ x4). In these cases the basic equations
can be reduced to the constant-coefficient wave equation with the forcing
determined by the landslide motion. For certain conditions on the landslide
characteristics (speed and volume per unit cross-section) the wave field can
be described explicitly. It is represented by one forced wave propagating
with the speed of the landslide and following its offshore direction, and two
free waves propagating in opposite directions with the wave celerity. For the
case of a near-resonant motion of the landslide along the power bottom
profile h ~ xγ the dynamics of the waves propagating offshore is
studied using the asymptotic approach. If the landslide is moving in the
fully resonant regime the explicit formula for the amplitude of the wave can
be derived. It is demonstrated that generally tsunami wave amplitude varies
non-monotonically with distance. |
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