Casagli, Nicola

Colombo, D.

Corazza, A.

Ferretti, A.

Guerri, L.

Leone, F.

Pagliara, P.

Putrino, P.

Righini, Gaia

English

Florence Research

Geophysical Research Abstracts, Vol. 8, 06087, 2006SRef-ID: 1607-7962/gra/EGU06-A-06087© European Geosciences Union 2006Use of remote sensing data for supporting landslide riskmanagement: case history of Cavallerizzo, CosenzaProvince, Southern ItalyN. Casagli (1), D. Colombo (2), A. Corazza (3), A. Ferretti (2), L. Guerri (1), F.Leone (3), P. Pagliara (3), P. Putrino (3), G. Righini (1)(1) University of Firenze, Department of Earth Sciences, Firenze, Italy(nicola.casagli@unifi.it), (2) Telerilevamento Europa, spin-off company of the Politecnico ofMilano, Italy (alessandro.ferretti@treuropa.com), (3)Ufficio Pianificazione Valutazione ePrevenzione dei Rischi, Italian Civil Protection Department, Presidence of Ministry Council,Italy (angelo.corazza@protezionecivile.it)Following landslide movements which occurred in March 2005 in Southern Italy, af-fecting the village of Cavallerizzo (Cosenza Province), the Italian Civil ProtectionDepartment (DPC) asked the Department of Earth Sciences, University of Firenze,competence centre of DPC for hydrogeological risk, to monitor the area using remotesensing data from both radar processing (Permanent Scatterers PS) and optical veryhigh resolution(VHR) satellites images (Quickbird, Ikonos satellites). A good Quick-bird archive image was acquired (dated on January 2003) while a new acquisitionfrom the Ikonos satellite was programmed and resulted in a very good, clear imagefor 17 March 2005, shortly after the events occurred. These images were orthorecti-fied and processed by means of radiometric and spectral enhancement; they were alsorendered on a digital elevation model giving the 3D perspective views. These datawere photo interpreted to underline the changes between the two acquisitions: indi-vidual landslides and unstable areas were recognised and mapped. These data wereintegrated with information from Standard Permanent Scatterers Analysis (SPSA),performed using an ascending and descending radar image data set collected by ESAERS satellite over the nine year period 1992-2001. This technique is a powerful toolin detecting and monitoring land movements and superficial deformation as it allowsthe identification of natural radar benchmarks. The interpretation of PS provided in-formation on the deformation rate and gave evidence of older unstable areas, as wellas those affected by recent movements. Moreover, ancillary data were collected suchas orthophotos, thematic maps on geology, geomorphology, tectonics and topography.All these information were integrated in to the G.I.S. environment. The analyses of thearea affected by land movements was performed in 5 working days only, due to thequick availability and processing of optical and radar remote sensing data integratedwith ancillary data. Afterwards a field survey was carried out in order to validate andrefine the results obtained from remote sensing data.

Use of remote sensing data for supporting landslide risk management: case history of Cavallerizzo, Cosenza Province, Southern Italy

https://flore.unifi.it/bitstream/2158/384468/1/Casagli%20et%20al%20GRA%20vol%208%20EGU%202006%20p.%206087.pdf

Use of remote sensing data for supporting landslide risk management: case history of Cavallerizzo, Cosenza Province, Southern Italy

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