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Subsidence was measured for the first time on railway tracks in the centralsector of Ebro Valley (NE Spain) using Differential Synthetic Aperture RadarInterferometry (DInSAR) techniques. This area is affected by evaporite karstand the analysed railway corridors traverse active sinkholes that producedeformations in these infrastructures. One of the railway tracks affected byslight settlements is the Madrid–Barcelona high-speed line, a form oftransport infrastructure highly vulnerable to ground deformation processes.Our analysis based on DInSAR measurements and geomorphological surveysindicates that this line shows dissolution-induced subsidence and compactionof anthropogenic deposits (infills and embankments). Significantsinkhole-related subsidence was also measured by DInSAR techniques on theCastejón–Zaragoza conventional railway line. This study demonstratesthat DInSAR velocity maps, coupled with detailed geomorphological surveys,may help in the identification of the railway track sections that areaffected by active subsidence

Railway deformation detected by DInSAR over active sinkholes in the Ebro Valley evaporite karst, Spain