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Sentinel-1 DInSAR for Monitoring Active Landslides in Critical Infrastructures: The Case of the Rules Reservoir (Southern Spain)

AuthorsReyes-Carmona, Cristina; Barra, Anna; Galve, Jorge Pedro; Monserrat, Oriol; Pérez-Peña, José Vicente; Mateos, Rosa María; Notti, Davide; Ruano, Patricia ; Millares, Agustín; López-Vinielles, Juan; Azañón, José Miguel
Reservoir safety
Geomorphological mapping
Issue Date3-Mar-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationRemote Sensing 12 (5): 809 (2020)
AbstractLandslides in reservoir contexts are a well-recognised hazard that may lead to dangerous situations regarding infrastructures and people’s safety. Satellite-based radar interferometry is proving to be a reliable method to monitor the activity of landslides in such contexts. Here, we present a DInSAR (Differential Interferometric Synthetic Aperture Radar) analysis of Sentinel-1 images that exemplifies the usefulness of the technique to recognize and monitor landslides in the Rules Reservoir (Southern Spain). The integration of DInSAR results with a comprehensive geomorphological study allowed us to understand the typology, evolution and triggering factors of three active landslides: Lorenzo-1, Rules Viaduct and El Arrecife. We could distinguish between rotational and translational landslides and, thus, we evaluated the potential hazards related to these typologies, i.e., retrogression (Lorenzo-1 and Rules Viaduct landslides) or catastrophic slope failure (El Arrecife Landslide), respectively. We also observed how changes in the water level of the reservoir influence the landslide’s behaviour. Additionally, we were able to monitor the stability of the Rules Dam as well as detect the deformation of a highway viaduct that crosses a branch of the reservoir. Overall, we consider that other techniques must be applied to continue monitoring the movements, especially in the El Arrecife Landslide, in order to avoid future structural damages and fatalities.
Publisher version (URL)https://doi.org/10.3390/rs12050809
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