Geologic Publications for Mount Rainier

Eighty years of data collected for determination of rainfall threshold triggering shallow landslides and mud-debris flows in the alps

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Author(s): Fabio Luino, Jerome De Graff, Anna Roccati, Marcella Biddoccu, Chiara Giorgia Cirio, Francesco Faccini, Laura Turconi

Category: PUBLICATION
Document Type:
Publisher: Water
Published Year: 2020
Volume: 12
Number: 133
Pages: 29
DOI Identifier: 10.3390/w12010133
ISBN Identifier:
Keywords: rainfall thresholds soil slip mud-debris flows Alps Lombardy region

Abstract:
Identifying the minimum rainfall thresholds necessary for landslides triggering is essential to landslide risk assessment. The Italian Alps have always been affected by shallow landslides and mud-debris flows, which caused considerable damage to property and, sometimes, casualties. We analysed information provided from different sources carrying on the most thorough research conducted for this alpine area. Thousands of documents and reports of rainfall values recorded over 80 years by rain gauges distributed in Sondrio and Brescia Provinces define the mean annual precipitation (MAP)-normalized intensity–duration thresholds for the initiation of shallow landslides and mud-debris flows. The established curves are generally lower compared to those proposed in literature for similar mountain areas in Italy and worldwide. Furthermore, we found that landslides occurred primarily at the same time or within 3 h from the maximum peak of rainfall intensity in summer events and in a period from 0 to 5 h or later in spring-autumn events. The paper provides a further contribution to the knowledge framework on the rainfall conditions required for the initiation of surficial landslides and mud-debris flows and their expected timing of occurrence. This knowledge is crucial to develop better warning strategies to mitigate geo-hydrological risk and reduce the socio-economic damage.

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Suggested Citations:
In Text Citation:
Luino and others (2020) or (Luino et al., 2020)

References Citation:
Luino, F., J. De Graff, A. Roccati, M. Biddoccu, C. Giorgia Cirio, F. Faccini, and L. Turconi, 2020, Eighty years of data collected for determination of rainfall threshold triggering shallow landslides and mud-debris flows in the alps: Water, Vol. 12, No. 133, 29 p., doi: 10.3390/w12010133.