Multi-technique approaches to Characterize and Monitor Coastal Landslides

The coast of Granada province (Spain) (also called "Costa Tropical") is a natural laboratory to study different types of slope movements. These slope movements are great objects of study to test multi-technique approaches for studying coastal landslides. Landslides hit urban estates and major infrastructures of this coastal region. Since 2014, we are applying different space- and ground- based radar interferometry (InSAR) techniques in combination with Uncrewed Aerial Vehicle Digital Photogrammetry (UAV-DP) and Terrestrial Laser Scanner (TLS) to study the kinematics and evolution of these landslides. Furthermore, we are performing detailed geological surveys to understand the cause of this slope movements usually associated with certain lithologies (i.e. phyllites or graphite mica schists) and structural settings (i.e. fault zones or dip slope situations). Here, we present several case studies where the mentioned techniques improved our capacity to evaluate the hazard of landslides impacting urban areas and infrastructures. In all cases the relationship between the geology of the site, InSAR/UAVDP/TLS data and the damage observed in human structures allowed a better understanding of the landslide kinematics and both the spatial and temporal evolution of the instability.