Publication Date:
2021-01-27
Description:
This research aims to highlight the importance of adopting a multi-disciplinary approach
to understanding the factors controlling large rock avalanches using the Scanno landslide, Italy,
as a case study. The study area is the Mount Genzana, Abruzzi Central Apennines, characterized
by the regional Difesa-Mount Genzana-Vallone delle Masserie fault zone. The Scanno landslide is
famous for its role in the formation of the Scanno Lake. The landslide is characterized by a wide
exposed scar, which was interpreted in previous studies as the intersection of high-angle joints and an
outcropping bedding plane on which the landslide failed sometime between the Upper Pleistocene
and the Holocene. In this study, the Scanno landslide was investigated through the integration of
geological, geomechanical and geomorphological surveys. Remote sensing techniques were used
to enrich the conventionally gathered datasets, while Geographic Information Systems (GIS) were
used to integrate, manage and investigate the data. The results of the authors investigation show
that the outcropping landslide scar can be interpreted as a low-angle fault, associated with the
Difesa-Mount Genzana-Vallone delle Masserie fault zone, which di ers from previous investigations
and interpretations of the area. The low-angle fault provides the basal failure surface of the landslide,
with two systematic high-angle joint sets acting as lateral release and back scarp surfaces, respectively.
In light of these new findings, pre- and post-failure models of the area have been created. The models
were generated in GIS by combining LiDAR (Light Detection and Ranging) and geophysics data
acquired on the landslide body and through bathymetric survey data of the Scanno Lake. Using the
pre- and post-failure models it was possible to estimate the approximate volume of the landslide.
Finally, back-analyses using static and dynamic limit equilibrium methods is also used to show the
possible influence of medium-to-high magnitude seismic events in triggering the Scanno landslide.
Description:
Published
Description:
id 1570
Description:
2T. Deformazione crostale attiva
Description:
JCR Journal
Keywords:
Scanno landslide
;
central Apennines
;
LiDAR
;
geological model
;
back-analysis
;
landslides in fault-zones
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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