Consiglio Nazionale delle Ricerche

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massimiliano.alvioli 2019-11-02 10:25:09


Tipo di prodottoArticolo in rivista
TitoloPreparing first-time slope failures hazard maps: form pixel-based to slope-unit based
Anno di pubblicazione2019
Autore/iG. Domènech (1), M. Alvioli (2), J. Corominas (3)
Affiliazioni autori(1) Division of Geotechnical Engineering and Geosciences, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya-BarcelonaTech, E-08034 Barcelona, Spain (2) Consiglio Nazionale delle Ricerche, Istituto di Ricerca per la Protezione Idrogeologica, Via Madonna Alta 126, I-06128 Perugia, Italy
Autori CNR e affiliazioni
  • inglese
AbstractIn this work, we present a novel quantitative geographical information system-based procedure to obtain the magnitude (area) and frequency of medium to large first-time shallow slope failures. The procedure has been set up at the Barcedana Valley, in the Tremp Basin (Eastern Pyrenees). First, pixel-based susceptibility classes were defined using a slope stability index obtained with the physically-based model SINMAP. The frequency calculated from the number of first-time failures recorded during the last 60 years was thenis assigned to each susceptibility class. We have devised a procedure to estimate the size of potential failures by means of the aggregation of pixels within the boundaries of morphological slope units, optimized for the purpose. Finally, the landslide hazard wasis prepared using the magnitude-frequency matrix. Results show that a proper pixel clustering has been carried which avoids the generation of small groups of pixels with different susceptibility degrees within the same slope unit. For a given hillslope, the area of the cluster of pixels depends on the size of the slope unit, which is not unique as it depends on the criterion used to delineate them. Therefore, the latter is a key factor in the final results. In this study, we validated our results with the size distribution of the observed landslides. The methodology presented in this work can be applied using any susceptibility assessment method with a pixel-based output.
Lingua abstractinglese
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RivistaLandslides (Berl., Print)
Attiva dal 2004
Editore: Springer - Berlin
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 1612-510X
Titolo chiave: Landslides (Berl., Print)
Titolo proprio: Landslides. (Berl., Print)
Titolo abbreviato: Landslides (Berl., Print)
Numero volume della rivista-
Fascicolo della rivista-
Verificato da refereeSì: Internazionale
Stato della pubblicazionePreprint
Indicizzazione (in banche dati controllate)-
Parole chiaveLandslide hazard, SINMAP, slope-units, physically-based, slope stability
Link (URL, URI)-
Titolo parallelo-
Data di accettazione30/09/2019
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR-
Progetti Europei-
Preparing first-time slope failures hazard maps: form pixel-based to slope-unit based (documento privato )
Descrizione: accepted version
Tipo documento: application/pdf