Terrain 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 × 10 6 m 2 and developed in weathered clayey soils. Landslide motion has caused building deterioration since they were constructed. John Merriman A History Of Modern Europe 3rd Edition. After a heavy rainfall period in winter 2009–2010, the movement was accelerated, worsening the situation.

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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. The Element Ken Robinson Epub Download For Pc there. 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. In the past years, the use of multi-temporal differential SAR interferomery (DInSAR) has proven to be a very useful tool to monitor slow moving landslides [,,,,,,,,] and subsidence [,,,,,,].

These two processes are widespread geological hazards characterized by motion rates reaching several cm/year, that can cause different degrees of structural damage to buildings and infrastructure. Landslide is a general term that describes the downslope movement of a mass of rock or soil [,]. Slope failures can even occur with low inclination angles, as failure not only depends on the effects of gravity, but on a variety of factors such as the geotechnical behavior of the materials (determined by its composition and microstructure), discontinuities, water and external loads.