Characteristic scales in landslide modelling

DI MAIO, ROSA and MILANO, LEOPOLDO (2009) Characteristic scales in landslide modelling. [Pubblicazione su rivista scientifica]

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Abstract

We studied a cellular automaton, able to reproduce the landslide frequency-size distributions from catalogues. From the comparison between our synthetic probability distribution and the landslide area probability distribution of three landslide inventories, we estimated the typical size of a single cell of our cellular automaton model to be from 35–100m2, which is important information if we are interested in monitoring a test area. To determine the probability of occurrence of a landslide of size s, we show that it is crucial to get information about the rate at which the system is approaching instability rather than the nature of the trigger. By varying such a driving rate, we find how the probability distribution changes and, in correspondence, how the size and the lifetime of the most probable events evolve. We also introduce a landslide-event magnitude scale based on the driving rate. Large values of the proposed intensity scale are related to landslide events with a fast approach to instability in a long distance of time, while small values are related to landslide events close together in time and approaching instability slowly.

Tipologia di documento:Pubblicazione su rivista scientifica
Parole chiave:Cellular automaton, landslide monitoring, landslide magnitude scale
Settori scientifico-disciplinari MIUR:Non specificato
Stato del full text:Accessibilità ristretta
Data:2009
Altri Autori:PIEGARI E., DI MAIO R., MILANO L.
Numero di pagine:9
Intervallo di pagina:pp. 515-523
Volume:16
Dipartimento o Struttura:Dipartimento di Scienze Fisiche
Titolo rivista/pubblicazione:NONLINEAR PROCESSES IN GEOPHYSICS
Numero di sistema:7583
Depositato il:21 Ottobre 2010 08:57
Ultima modifica:21 Ottobre 2010 08:57

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