Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloIntegration of InSAR Analysis and Numerical
Anno di pubblicazione2015
FormatoCartaceo
Autore/iJoao Catalao, Giovanni Nico, Piernicola Lollino, Vasco Conde, Gaetano Lorusso, Catarina Silva
Affiliazioni autoriUniversidade de Lisboa, IDL CNR-IAC CNR-IRPI Universidade de Lisboa, IDL CNR-iRPI Universidade de Lisboa, CeGUL
Autori CNR e affiliazioni
  • GIOVANNI NICO
  • PIERNICOLA LOLLINO
Lingua/e
  • inglese
AbstractIn this work, we exploit the integration of an advanced synthetic aperture radar (SAR) interferometry technique and the application of the finite-element method for the assessment and the interpretation of a localized subsidence phenomenon that took place within a specific area of Lisbon, Portugal. SAR images over the Lisbon city, covering different time intervals in the period of 1995-2010, were acquired and processed by means of the persistent scatterers (PSs) technique. Results clearly reveals a localized subsidence, limited to an area 2 km × 1.5 km wide, which has been confirmed by the leveling performed in 1976, 1996, and 2010. A physical interpretation of the observed ground deformations is provided based on the results of a finite-element model using stratigraphic data, in situ piezometric measurements, and geotechnical properties of the involved soils. The ground subsidence is interpreted as the consequence of a consolidation process affecting the central fine-grained soil layer, which in turn has been driven by water withdrawal from the existing aquifers. The change of the hydraulic boundary conditions was generated by the excavation works for the construction of underground lines and also by the reduction of rainfall water infiltration as an effect of the increase in ground surface impermeable areas due to urbanization. The consequent consolidation process of the compressible fine-grained soil layer is supposed to provide a reasonable explanation of the observed time series of ground displacement in the examined area.
Lingua abstractinglese
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RivistaIEEE journal of selected topics in applied earth observations and remote sensing (Print)
Attiva dal 2008
Editore: IEEE, - Piscataway, N.J.
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 1939-1404
Titolo chiave: IEEE journal of selected topics in applied earth observations and remote sensing (Print)
Titolo proprio: IEEE journal of selected topics in applied earth observations and remote sensing. (Print)
Titolo abbreviato: IEEE j. sel. top. appl. earth obs. remote sens. (Print)
Titoli alternativi:
  • Institute of Electrical and Electronic Engineers journal of selected topics in applied earth observations and remote sensing (Print)
  • Journal of selected topics in applied earth observations and remote sensing (Print)
  • J-STARS (Print)
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DOI10.1109/JSTARS.2015.2428615
Verificato da refereeSì: Internazionale
Stato della pubblicazionePreprint
Indicizzazione (in banche dati controllate)-
Parole chiaveENVISAT, ERS-1/2, FEM modeling, persistent
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Strutture CNR
  • IAC — IAC - Sede secondaria di Bari
  • IRPI — IRPI - Sede secondaria di Bari
Moduli/Attività/Sottoprogetti CNR-
Progetti Europei-
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