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Subsidence induced by urbanisation in the city of Rome detected by advanced InSAR technique and geotechnical investigations / S. Stramondo in Remote sensing of environment, vol 112 n° 6 (16/06/2008)  

Public [article]  inRemote sensing of environment > vol 112 n° 6 (16/06/2008) . - pp 3160 - 3172 Titre : Subsidence induced by urbanisation in the city of Rome detected by advanced InSAR technique and geotechnical investigations Type de document : Article/Communication Auteurs : S. Stramondo, Auteur ; F. Bozzano, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 3160 - 3172 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] analyse diachronique [Termes IGN] bâtiment [Termes IGN] déformation verticale de la croute terrestre [Termes IGN] image Envisat-ASAR [Termes IGN] image ERS-SAR [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] lit majeur [Termes IGN] Rome [Termes IGN] sédiment [Termes IGN] série temporelle [Termes IGN] subsidence [Termes IGN] Tibre (fleuve) [Termes IGN] urbanisation Résumé : (Auteur) We applied the Interferometric Point Target Analysis (IPTA) technique to study the city of Rome (Italy) aiming to detect and measure the surface movements of buildings and urban structures. The available SAR dataset has been delivered by ESA CAT1 3258 and ranges the period 1992-2005. In particular ERS1-ERS2 data processed covers 1995-2000, while Envisat ASAR 2002-2005. The Point Target velocity map shows a general stability except for some very local areas affected by subsidence rate larger than 10 mm/year. The analysis of the time series, compared to a detailed geological and geotechnical investigation of the lithostratigraphy of the alluvial sediments of the Tiber River, and combined with a temporal reconstruction of the expansion of the city over the alluvial valleys, allowed us to depict the main factors controlling the observed subsidence. These are: the in situ effective stress conditions, the related compressibility and viscous characteristics of the loaded soils, the thickness of the compressible stratum, the time since loading instant, and the entity of loading. Furthermore the observed subsidence is time-dependent, even at a long time-scale, with respect to the age of the buildings being most of the buildings constructed since the '50s still affected by slow subsidence. We mainly focused on the Grottaperfetta stream valley that is characterized by an anomalous high and time-lasting subsidence. Original data on the lithostratigraphic setting of this alluvial valley indicate that the high subsidence rate measured up to 2005 is caused by a still active primary consolidation process. Copyright Elsevier Numéro de notice : A2008-536 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2008.03.008 En ligne : https://doi.org/10.1016/j.rse.2008.03.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29606 [article]