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A-DInSAR Monitoring of Landslide and Subsidence Activity: A Case of Urban Damage in Arcos de la Frontera, Spain

AuthorsBru, Guadalupe ; González Méndez, Pablo José ; Mateos, Rosa M.; Roldán, Francisco Javier; Herrera, Gerardo; Béjar-Pizarro, Marta; Fernández Torres, José
KeywordsSlow-moving landslides
Urban damage
“ENVISAT 2010+” project
Issue Date31-Jul-2017
PublisherMultidisciplinary Digital Publishing Institute
CitationRemote Sensing 9(8): 787 (2017)
AbstractTerrain surface displacements at a site can be induced by more than one geological process. In this work, we use advanced differential interferometry SAR (A-DInSAR) to measure ground deformation in Arcos de la Frontera (SW Spain), where severe damages related to landslide activity and subsidence have occurred in recent years. The damages are concentrated in two residential neighborhoods constructed between 2001 and 2006. One of the neighborhoods, called La Verbena, is located at the head of an active retrogressive landslide that has an extension of around 0.17 × 106 m2 and developed in weathered clayey soils. Landslide motion has caused building deterioration since they were constructed. After a heavy rainfall period in winter 2009–2010, the movement was accelerated, worsening the situation. The other neighborhood, Pueblos Blancos, was built over a poorly compacted artificial filling undergoing a spatially variable consolidation process which has also led to severe damage to buildings. For both cases, a short set of C-band data from the “ENVISAT 2010+” project has been used to monitor surface displacement for the period spanning April 2011–January 2012. In this work we characterize the mechanism of both ground deformation processes using in situ and remote sensing techniques along with a detailed geological interpretation and urban damage distribution
Publisher version (URL)https://doi.org/10.3390/rs9080787
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