The application of numerical debris flow modelling for the generation of physical vulnerability curves (Articolo in rivista)

Type
Label
  • The application of numerical debris flow modelling for the generation of physical vulnerability curves (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.5194/nhess-11-2047-011 (literal)
Alternative label
  • Quan Luna B., Blahut J., van Westen C.J., Sterlacchini S., van Asch T.W.J., Akbas S.O. (2011)
    The application of numerical debris flow modelling for the generation of physical vulnerability curves
    in Natural hazards and earth system sciences (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Quan Luna B., Blahut J., van Westen C.J., Sterlacchini S., van Asch T.W.J., Akbas S.O. (literal)
Pagina inizio
  • 2047 (literal)
Pagina fine
  • 2060 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 11 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 14 (literal)
Note
  • Scopus (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Quan Luna B., van Westen C.J. - Faculty of Geoinformation Science and Earth Observation (ITC), University of Twente, P.O. Box 6, 7500 AA Enschede, The Netherlands Blahut J. - Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, V Hole?sovi?ck´ach 41, 182 09 Prague, Czech Republic Sterlacchini S. - Institute for the Dynamic Environmental Processes, National Research Council (CNR-IDPA), Piazza della Scienza 1, 20126 Milan, Italy van Asch T.W.J. - Faculty of Geosciences, Utrecht University, Utrecht, The Netherlands Akbas S.O. - Civil Engineering Department, Gazi University, Ankara, Turkey (literal)
Titolo
  • The application of numerical debris flow modelling for the generation of physical vulnerability curves (literal)
Abstract
  • For a quantitative assessment of debris flow risk, it is essential to consider not only the hazardous process itself but also to perform an analysis of its consequences. This should include the estimation of the expected monetary losses as the product of the hazard with a given magnitude and the vulnerability of the elements exposed. A quantifiable integrated approach of both hazard and vulnerability is becoming a required practice in risk reduction management. This study aims at developing physical vulnerability curves for debris flows through the use of a dynamic run-out model. Dynamic run-out models for debris flows are able to calculate physical outputs (extension, depths, velocities, impact pressures) and to determine the zones where the elements at risk could suffer an impact. These results can then be applied to consequence analyses and risk calculations. On 13 July 2008, after more than two days of intense rainfall, several debris and mud flows were released in the central part of the Valtellina Valley (Lombardy Region, Northern Italy). One of the largest debris flows events occurred in a village called Selvetta. The debris flow event was reconstructed after extensive field work and interviews with local inhabitants and civil protection teams. The Selvetta event was modelled with the FLO-2D program, an Eulerian formulation with a finite differences numerical scheme that requires the specification of an input hydrograph. The internal stresses are isotropic and the basal shear stresses are calculated using a quadratic model. The behaviour and run-out of the flow was reconstructed. The significance of calculated values of the flow depth, velocity, and pressure were investigated in terms of the resulting damage to the affected buildings. The physical damage was quantified for each affected structure within the context of physical vulnerability, which was calculated as the ratio between the monetary loss and the reconstruction value. Three different empirical vulnerability curves were obtained, which are functions of debris flow depth, impact pressure, and kinematic viscosity, respectively. A quantitative approach to estimate the vulnerability of an exposed element to a debris flow which can be independent of the temporal occurrence of the hazard event is presented. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it