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| Titel |
Critical rainfall thresholds for triggering shallow landslides in the Serchio River Valley (Tuscany, Italy) |
| VerfasserIn |
R. Giannecchini, Y. Galanti, G. D'Amato Avanzi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 3 ; Nr. 12, no. 3 (2012-03-30), S.829-842 |
| Datensatznummer |
250010624
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| Publikation (Nr.) |
 copernicus.org/nhess-12-829-2012.pdf |
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| Zusammenfassung |
The Serchio River Valley, in north-western Tuscany, is a well-known tourism
area between the Apuan Alps and the Apennines. This area is frequently hit
by heavy rainfall, which often triggers shallow landslides, debris flows and
debris torrents, sometimes causing damage and death. The assessment of the
rainfall thresholds for the initiation of shallow landslides is very
important in order to improve forecasting and to arrange efficient alarm
systems.
With the aim of defining the critical rainfall thresholds for the Middle
Serchio River Valley, a detailed analysis of the main rainstorm events was
carried out. The hourly rainfall recorded by three rain gauges in the
1935–2010 interval was analysed and compared with the occurrence of shallow
landslides. The rainfall thresholds were defined in terms of mean intensity
I, rainfall duration D, and normalized using the mean annual precipitation.
Some attempts were also carried out to analyze the role of rainfall prior to
the damaging events. Finally, the rainfall threshold curves obtained for the
study area were compared with the local, regional and global curves proposed
by various authors. The results of this analysis suggest that in the study
area landslide activity initiation requires a higher amount of rainfall and
greater intensity than elsewhere. |
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