Casagli, Nicola

Del Conte, S.

Proietti, C.

English

Florence Research

Geophysical Research Abstracts,Vol. 11, EGU2009-10540-1, 2009EGU General Assembly 2009© Author(s) 2009Spatial and temporal monitoring of urbanization by Persistent ScatterersInterferometry techniqueN. Casagli, S. Del Conte, and C. ProiettiUniversity of Firenze, Earth Sciences Department, Italy (chiara.proietti@unifi.it)Satellite InSAR (Interferometric Synthetic Aperture Radar) has shown in recent years its capabilities in providingprecise measurements of ground displacement. In the case of slow movements (up to few cm/year) affecting urbanareas, the multi-interferogram techniques, such as the Permanent Scatterers (PS) (developed by Tele-RilevamentoEuropa, a spin-off company of the Politecnico di Milano University), are able to retrieve the spatial distribution ofdisplacements and their evolution along the monitored period.Thanks to the availability of archive datasets of SAR images acquired by the ERS1/2 satellites (ESA - EuropeanSpatial Agency), spanning from 1992 to 2002, and images by RADARSAT-1 (CSA - Canadian Spatial Agency),spanning from 2003-to present, the PS analysis can be applied to provide back analysis and monitoring of grounddeformation.The PS analysis allowed us to detect, characterize and monitor areas affected by ground deformation.Urban areas present many sites affected by ground movement caused by new surface and underground infrastruc-tures and sediment consolidation processes started with new building works.The integration of PS data with construction phases, geotechnical deposits properties and recent urbanizationplans allows the characterization of deformations caused by new urbanization processes.The temporal series analysis allowed us to set the construction effects on the surrounding buildings both forsuperficial and underground urbanization. At a detailed scale, satellite data provide relevant multi-temporalinformation data to assess spatial and temporal evolution of deformations.In particular here is presented an innovative post-processing analysis of PS data to individuate anomalies indeformation trends, very useful for emergency real-time forecast and surveillance phases.The issues also confirm that this chain, from measurements to characterization of new urbanization impact, is avaluable method in deferred time risk management.

Spatial and temporal monitoring of urbanization by Persistent Scatterers Interferometry technique

https://flore.unifi.it/bitstream/2158/924932/1/Casagli%20et%20al%20GRA%20vol%2011%20EGU%202009.pdf

Spatial and temporal monitoring of urbanization by Persistent Scatterers Interferometry technique

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