Dr. Federico Raspini Profile

Dr. Federico Raspini

at Univ degli Studi di Firenze

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Proceedings Article | 19 June 2015 Paper

Subsidence mapping, characterization, and modeling: the ESA-GMES Terrafirma services

F. Raspini, S. Bianchini, C. Del Ventisette, S. Moretti, C. Loupasakis, D. Rozos, J. Duro, M. Garcia

Proceedings Volume 9535, 953516 (2015) https://doi.org/10.1117/12.2192199

KEYWORDS: Data modeling, Interferometry, Satellites, Synthetic aperture radar, Water, Finite element methods, Landslides, Motion measurement, Mining, Associative arrays

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Land subsidence is a common natural hazard striking extensive areas worldwide that can be triggered by geological and/or anthropogenic factors. In many cases, subsidence affects urbanized areas and causes remarkable economic loss. Adopted policies and solutions for land subsidence management can be various, but despite this variability, where mitigation methods have to be put into practice, the detailed mapping, characterization and simulation of subsidence have to precede their design and implementation. In the framework of the Terrafirma Project (www.terrafirma.eu.com), the exploitation of Persistent Scatterer Interferometry (PSI) for subsidence analysis has been promoted. Satellite interferometry, thanks to its wide spatial coverage and its millimeter accuracy, is ideally suited for the measurement of the spatial extent and magnitude of surface deformations associated with subsidence phenomena. Three validated case studies, where subsidence is caused by different factors, are presented here: the wide area of Rome (Italy), the Gioia Tauro plain (Italy) and the Kalochori village (Greece). These case studies have been selected with the aim of showing the main activities that must be covered and performed when dealing with geohazard investigations, i.e., mapping, monitoring and modeling. Particularly, data from ERS1/2, Envisat and Radarsat satellites have been exploited to map ground deformation in the area of Rome and to monitor the ground subsidence in the Gioia Tauro plain. Due to the large availability of geological and geotechnical data, the area of Kalochori village has been selected to model the land subsidence by applying Finite Element simulation. Results of the simulation have been validated with PSI techniques.

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