Consiglio Nazionale delle Ricerche

Tipo di prodottoAbstract in atti di convegno
TitoloRainfall thresholds for the possible initiation of landslides in different environmental settings in Italy
Anno di pubblicazione2018
FormatoElettronico
Autore/iSilvia Peruccacci, Maria Teresa Brunetti, Stefano Luigi Gariano, Massimo Melillo, Mauro Rossi, Fausto Guzzetti
Affiliazioni autoriCNR, IRPI, Perugia, Italy
Autori CNR e affiliazioni
  • STEFANO LUIGI GARIANO
  • MAURO ROSSI
  • SILVIA PERUCCACCI
  • MARIA TERESA BRUNETTI
  • MASSIMO MELILLO
  • FAUSTO GUZZETTI
Lingua/e
  • inglese
AbstractThe large physiographic variability and the abundance of landslide and rainfall data make Italy an ideal site to investigate variations in the rainfall conditions that can trigger rainfall-induced landslides. To build a catalogue of 2309 rainfall events with - mostly shallow - landslides in Italy between January 1996 and February 2014, we used accurate landslide information and rainfall data captured by 2228 rain gauges. For each rainfall event with landslides, we reconstructed the rainfall presumably responsible for the failure, in terms of rainfall duration D (in hours) and cumulated event rainfall E (in mm). Adopting a power-law threshold model, we calculated objective and reproducible ED thresholds. We defined a national threshold for Italy, and 26 regional thresholds for environmental subdivisions based on topography, lithology, land-use, land cover, climate, and meteorology. We used the thresholds to assess the rainfall conditions that can result in landslides in different environmental settings in Italy. We found that the national and the environmental thresholds are similar, and cover a small part of the possible DE domain. The finding encourages the use of empirical rainfall thresholds for landslide forecasting in Italy, but poses an empirical limitation to the possibility of defining accurate thresholds for small geographical areas. We observed differences between some of the thresholds. With increasing mean annual precipitation (MAP), the thresholds become higher and steeper, indicating that more rainfall is needed to trigger landslides where the MAP is higher. We also observed that the thresholds become higher for stronger rocks, and that forests exhibit a higher threshold than agricultural areas. We maintain that our findings foster the understanding of the rainfall conditions responsible for landslides, and we expect that our results will have an impact on the definition of new rainfall thresholds for possible landslide occurrence in Italy, and elsewhere
Pagine daEGU2018-7696
Pagine aEGU2018-7696
Pagine totali1
RivistaGeophysical research abstracts (Online)
Attiva dal 2000
Editore: Copernicus GmbH - Katlenburg-Lindau
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 1607-7962
Titolo chiave: Geophysical research abstracts (Online)
Titolo proprio: Geophysical research abstracts. (Online)
Titolo abbreviato: Geophys. res. abstr. (Online)
Numero volume della rivista20
Serie/Collana-
Titolo del volume-
Numero volume della serie/collana-
Curatore/i del volume-
ISBN-
DOI-
Verificato da referee-
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)-
Parole chiaverainfall thresholds, rainfall, shallow landslides, italy
Link (URL, URI)https://meetingorganizer.copernicus.org/EGU2018/EGU2018-7696.pdf
Titolo convegno/congressoEuropean Geosciences Union General Assembly 2018
Luogo convegno/congressoVienna
Data/e convegno/congresso08-13/04/2018
RilevanzaInternazionale
RelazioneContributo
Titolo parallelo-
Scadenza embargo-
Licenza-
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR
  • TA.P05.006.002 : Valutazione del rischio posto da fenomeni geo-idrologici e sviluppo di strategie di mitigazione
Progetti Europei-
Allegati
Rainfall thresholds for the possible initiation of landslides in different environmental settings in Italy (documento privato )
Tipo documento: application/pdf