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EnglishIn the last years, numerical modelling has emerged as a useful tool for landslide runout analysis and risk assessment. Several of the developed models have in-cluded innovations that have significantly advanced both the ability to simulate real events and the understanding of rapid landslide processes. However, it is here evidenced that in both interpreting run-out results and evaluating numerical model performances a particular care is necessary. To this aim, the continuum-mechanics based code RASH3D is used to back-analyse the case of the Baio Dora debris flow. Carried-out analyses are intended to highlight the influence that some factors like 1) Digital Elevation Model (DEM) resolution; 2) rheological law; and 3) entrainment process can have on numerical results. In particular, it is observed that a low resolution DEM can make fail all the at-tempts of selecting and calibrating the more appropriate rheology. On the other side, the selection of a wrong rheology can give a unrealistic run-out path, that is the moving mass can go as far taking a completely incorrect flowing direction. Fi-nally, it emerges that the entrainment of channel path material can significantly change the mobility of a flow, through rapid changes of both the flow volume and rheology.
On the use of numerical models for flow-like landslide simulation / Pirulli M.; Scavia C.; Tararbra M.. - STAMPA. - 2(2015), pp. 1625-1628. ((Intervento presentato al convegno XII Congress of the International Association of Engineering Geology and the Environment (IAEG) tenutosi a Torino nel 15-19 Settembre 2014 [10.1007/978-3-319-09057-3_289].
| Titolo: | On the use of numerical models for flow-like landslide simulation | |
| Autori: | ||
| Data di pubblicazione: | 2015 | |
| Abstract: | In the last years, numerical modelling has emerged as a useful tool for landslide runout analysis... and risk assessment. Several of the developed models have in-cluded innovations that have significantly advanced both the ability to simulate real events and the understanding of rapid landslide processes. However, it is here evidenced that in both interpreting run-out results and evaluating numerical model performances a particular care is necessary. To this aim, the continuum-mechanics based code RASH3D is used to back-analyse the case of the Baio Dora debris flow. Carried-out analyses are intended to highlight the influence that some factors like 1) Digital Elevation Model (DEM) resolution; 2) rheological law; and 3) entrainment process can have on numerical results. In particular, it is observed that a low resolution DEM can make fail all the at-tempts of selecting and calibrating the more appropriate rheology. On the other side, the selection of a wrong rheology can give a unrealistic run-out path, that is the moving mass can go as far taking a completely incorrect flowing direction. Fi-nally, it emerges that the entrainment of channel path material can significantly change the mobility of a flow, through rapid changes of both the flow volume and rheology. | |
| ISBN: | 9783319090566 | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Pirulli_Scavia_Tararbra_2015.pdf | Articolo principale | 2. Post-print / Author's Accepted Manuscript | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2543292
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