Detection of ground subsidence in the city of Lisbon: Comparison of InSAR and topographic measurements

Catalão, João; Nico, Giovanni; Conde, Vasco

doi:10.1109/jurse.2011.5764808

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…A negative velocity denotes a movement away from the satellite, i.e., a subsidence displacement. This subsidence was already detected within the TERRAFIRMA project [17] and afterward analyzed and validated by [12] and [41]. Although these studies coincide as regards the subsidence location and spatial extension of the subsiding area, the displacement value and the corresponding mean velocity are quite different in the analyzed periods.…”

Section: ) Insar Time Series and Comparison With Levelingsupporting

confidence: 60%

Integration of InSAR Analysis and Numerical Modeling for the Assessment of Ground Subsidence in the City of Lisbon, Portugal

Catalão

Nico

Lollino

et al. 2016

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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In 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.Index Terms-ENVISAT, ERS-1/2, FEM modeling, persistent scatterers (PSs), soil consolidation, subsidence, synthetic aperture radar interferometry (InSAR).

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Section: ) Insar Time Series and Comparison With Levelingsupporting

confidence: 60%

Integration of InSAR Analysis and Numerical Modeling for the Assessment of Ground Subsidence in the City of Lisbon, Portugal

Catalão

Nico

Lollino

et al. 2016

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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“…As is well known, drilling tunnels may induce surface settlements of a few centimeters because of groundwater drainage and associated pore reduction. They may seem of little importance if compared to those associated with oil, gas or groundwater extraction but they are large enough to represent a potential treat, especially below densely built-up urban areas [9][10][11][12][13]. Examples are reported in the literature in the cases of the construction of an investigation audit 1.5 km away from the Zeuzier arch dam [14] and the Gotthard highway tunnel [15,16].…”

Section: Introductionmentioning

confidence: 99%

Detection and Monitoring of Tunneling Induced Ground Movements Using Sentinel-1 SAR Interferometry

et al. 2019

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SAR interferometry is a powerful tool to obtain millimeter accuracy measurements of surface displacements. The Sentinel-1 satellite mission nowadays provides extensive spatial coverage, regular acquisitions and open availability. In this paper, we present an MT-InSAR analysis showing the spatial and temporal evolution of ground displacements arising from the construction of a 3.71 km overflow tunnel in Genoa, Italy. Underground tunneling can often modify the hydrological regime around an excavated area and might induce generalized surface subsidence phenomena due to pore pressure variations, especially under buildings. The tunnel was excavated beneath a densely urbanized area lying on upper Cretaceous marly limestone and Pliocene clays. Significant cumulative displacements up to 30 mm in the Line of Sight (LOS) direction were detected during the tunnel excavation. No displacements were recorded before until the middle of 2016. The Persistent Scatterers Interferometry (PSI) analysis reveals in high detail the areal subsidence, especially where the subsurface is characterized by clay and alluvial deposits as well as there is the presence of large building complexes. The time-series and the displacement rate cross-sections highlight a clear relation with the tunnel face advancement, responsible for the subsidence phenomena, which proceeded northward starting from the middle of 2016 to the end of 2017. The stabilization occurred in a range of five-six months from the beginning of each displacement phase. Due to the low subsidence ratio the ground settlements did not cause severe damages to the buildings.

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The contribution of PSInSAR interferometry to landslide hazard in weak rock-dominated areas

et al. 2014

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Detection of ground subsidence in the city of Lisbon: Comparison of InSAR and topographic measurements

Cited by 4 publications

References 10 publications

Integration of InSAR Analysis and Numerical Modeling for the Assessment of Ground Subsidence in the City of Lisbon, Portugal

Integration of InSAR Analysis and Numerical Modeling for the Assessment of Ground Subsidence in the City of Lisbon, Portugal

Detection and Monitoring of Tunneling Induced Ground Movements Using Sentinel-1 SAR Interferometry

The contribution of PSInSAR interferometry to landslide hazard in weak rock-dominated areas

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