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| Titel |
Automated reconstruction of rainfall events responsible for shallow landslides |
| VerfasserIn |
G. Vessia, M. Parise, M. T. Brunetti, S. Peruccacci, M. Rossi, C. Vennari, F. Guzzetti |
| 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 Sciences ; 14, no. 9 ; Nr. 14, no. 9 (2014-09-10), S.2399-2408 |
| Datensatznummer |
250118659
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| Publikation (Nr.) |
 copernicus.org/nhess-14-2399-2014.pdf |
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| Zusammenfassung |
| Over the last 40 years, many contributions have identified empirical rainfall
thresholds (e.g. rainfall intensity (I) vs. rainfall duration (D),
cumulated rainfall vs. rainfall duration (ED), cumulated rainfall vs.
rainfall intensity (EI)) for the possible initiation of shallow landslides,
based on local and global inventories. Although different methods to trace
the threshold curves have been proposed and discussed in literature, a
systematic study to develop an automated procedure to select the rainfall
event responsible for the landslide occurrence has only rarely been
addressed. Objective criteria for estimating the rainfall responsible for the
landslide occurrence play a prominent role on the threshold values. In this
paper, two criteria for the identification of the effective rainfall events
are presented. The first criterion is based on the analysis of the time
series of rainfall mean intensity values over 1 month preceding the landslide
occurrence. The second criterion is based on the analysis of the trend in the
time function of the cumulated mean intensity series calculated from the
rainfall records measured through rain gauges. The two criteria have been
implemented in an automated procedure that is written in the R language. A
sample of 100 shallow landslides collected in Italy from 2002 to 2012 was
used to calibrate the procedure. The cumulated event rainfall (E) and
duration (D) of rainfall events that triggered the documented landslides
are calculated through the new procedure and are fitted with power law in the
D, E diagram. The results are discussed by comparing the D, E pairs
calculated by the automated procedure and the ones by the expert method. |
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