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| Titel |
An equivalent fluid/equivalent medium approach for the numerical simulation of coastal landslides propagation: theory and case studies |
| VerfasserIn |
P. Mazzanti, F. Bozzano |
| 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 ; 9, no. 6 ; Nr. 9, no. 6 (2009-11-25), S.1941-1952 |
| Datensatznummer |
250007062
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| Publikation (Nr.) |
 copernicus.org/nhess-9-1941-2009.pdf |
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| Zusammenfassung |
| Coastal and subaqueous landslides can be very dangerous phenomena since they
are characterised by the additional risk of induced tsunamis, unlike their
completely-subaerial counterparts. Numerical modelling of landslides
propagation is a key step in forecasting the consequences of landslides. In
this paper, a novel approach named Equivalent Fluid/Equivalent Medium (EFEM)
has been developed. It adapts common numerical models and software that were
originally designed for subaerial landslides in order to simulate the
propagation of combined subaerial-subaqueous and completely-subaqueous
landslides. Drag and buoyancy forces, the loss of energy at the
landslide-water impact and peculiar mechanisms like hydroplaning can be
suitably simulated by this approach; furthermore, the change in properties
of the landslide's mass, which is encountered at the transition from the
subaerial to the submerged environment, can be taken into account. The
approach has been tested by modelling two documented coastal landslides (a
debris flow and a rock slide at Lake Albano) using the DAN-W code. The
results, which were achieved from the back-analyses, demonstrate the
efficacy of the approach to simulate the propagation of different types of
coastal landslides. |
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