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Geosciences 2018, 8(2), 67; https://doi.org/10.3390/geosciences8020067

Landslides and Subsidence Assessment in the Crati Valley (Southern Italy) Using InSAR Data

1
Department of Biology, Ecology and Earth Science, University of Calabria, 87036 Arcavacata di Rende (Cs), Italy
2
Istituto Nazionale di Geofisica e Vulcanologia (INGV), 00143 Roma, Italy
*
Author to whom correspondence should be addressed.
Received: 9 October 2017 / Revised: 2 February 2018 / Accepted: 6 February 2018 / Published: 10 February 2018
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Abstract

In this work, we map surficial ground deformations that occurred during the years 2004–2010 in the Crati Valley (Southern Italy). The valley is in one of the most seismically active regions of the Italian peninsula, and presents slope instability and widespread landslide phenomena. We measured ground deformations by applying the small baseline subset (SBAS) technique, a multi-temporal synthetic aperture radar interferometry (InSAR) methodology that is used to process datasets of synthetic aperture radar (SAR) images. Ground displacements are only partially visible with the InSAR technique. Visibility depends on the geometry of the acquisition layout, such as the radar acquisition angle view, and the land use. These two factors determine the backscattering of the reflected signal. Most of the ground deformation detected by InSAR can be attributed to the gravitational mass movements of the hillslopes (i.e., landslides), and the subsidence of the quaternary deposits filling the valley. The movements observed along the valley slopes were compared with the available landslide catalog. We also identified another cause of movement in this area, i.e., ground subsidence due to the compaction of the quaternary deposits filling the valley. This compaction can be ascribed to various sources, such as urban population growth and sprawl, industrial water withdrawal, and tectonic activity. View Full-Text
Keywords: SBAS-InSAR; Crati Valley; Southern Italy; subsidence; landslides; salt mine SBAS-InSAR; Crati Valley; Southern Italy; subsidence; landslides; salt mine
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Cianflone, G.; Tolomei, C.; Brunori, C.A.; Monna, S.; Dominici, R. Landslides and Subsidence Assessment in the Crati Valley (Southern Italy) Using InSAR Data. Geosciences 2018, 8, 67.

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