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| Titel |
Multi-temporal LiDAR-DTMs as a tool for modelling a complex landslide: a case study in the Rotolon catchment (eastern Italian Alps) |
| VerfasserIn |
G. Bossi, M. Cavalli, S. Crema, S. Frigerio, B. Quan Luna, M. Mantovani, G. Marcato, L. Schenato, A. Pasuto |
| 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 ; 15, no. 4 ; Nr. 15, no. 4 (2015-04-01), S.715-722 |
| Datensatznummer |
250119412
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| Publikation (Nr.) |
 copernicus.org/nhess-15-715-2015.pdf |
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| Zusammenfassung |
The geomorphological change detection through the comparison of repeated
topographic surveys is a recent approach that benefits greatly from the
latest developments in topographical data acquisition techniques. Among
them, airborne LiDAR makes the monitoring of geomorphological changes a more
reliable and accurate approach for natural hazard and risk management. In
this study, two LiDAR digital terrain models (DTMs) (2 m resolution) were acquired just before and
after a complex 340 000 m3 landslide event (4 November 2010)
that generated a debris flow in the channel of the Rotolon catchment
(eastern Italian Alps). The analysis of these data was used to set up the
initial condition for the application of a dynamic model.
The comparison between the pre- and post-event DTMs allowed us to identify
erosion and depositional areas and the volume of the landslide. The
knowledge of the phenomenon dynamics was the base of a sound back analysis
of the event with the 3-D numerical model DAN3D. This particular code was
selected for its capability to modify the rheology and the parameters of the
moving mass during run-out, as actually observed along the path of the 2010
debris flow.
Nowadays some portions of Mt. Rotolon flank are still moving and show signs
of detachment. The same soil parameters used in the back-analysis model
could be used to simulate the run-out for possible future landslides,
allowing us to generate reliable risk scenarios useful for awareness of civil
defense and strategy of emergency plans. |
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