Interpretation of Aerial Photographs and Satellite SAR Interferometry for the Inventory of Landslides

Abstract

An inventory of landslides with an indication of the state of activity is necessary in order to establish hazard maps. We combine interpretation of aerial photographs and information on surface displacement from satellite Synthetic Aperture Radar (SAR) interferometry for mapping landslides and intensity classification. Sketch maps of landslides distinguished by typology and depth, including geomorphological features, are compiled by stereoscopic photo-interpretation. Results achieved with differential SAR interferometry (InSAR) and Persistent Scatterer Interferometry (PSI) are used to estimate the state of activity of landslides around villages and in sparsely vegetated areas with numerous exposed rocks. For validation and possible extension of the inventory around vegetated areas, where InSAR and PSI failed to retrieve displacement information, traditional monitoring data such as topographic measurements and GPS are considered. Our results, covering extensive areas, are a valuable contribution towards the analysis of landslide hazards in areas where traditional monitoring techniques are sparse or unavailable. In this contribution we discuss our methodology for a study area around the deep-seated landslide in Osco in southern Switzerland.

The COSMO-SkyMed Constellation Monitors the Costa Concordia Wreck

“…InSAR-based techniques were mainly applied, thanks to the availability of huge historical SAR image archives [8], to measure and monitor ground deformation phenomena that had already occurred. Geoscientists have widely exploited SAR-based information to resolve the spatial distribution and temporal evolution of displacements in areas affected by slow or very slow moving landslides (e.g., [9][10][11][12][13]) or by land subsidence (e.g., [14][15][16][17]). On the contrary, few examples exist of the use of satellite InSAR in real and quasi-real time.…”

Study on the Prediction of the Shallow Failure-prone Sites by Using Digital Aerial Photos: on the Mt. Umyeon in Seoul City

“…특히 재해 전·후의 현황에 대한 비교변화를 통해서 피해유무의 판정에 주로 이용되어 왔다 (Sugito et al, 2012;Su and Stoher, 2000;Strozii et al, 2013;Shimizu, 1983). (Kim and Jang, 2014;Kim et al, 2013).…”

Monitoring soil creep landsliding in an urban area using persistent scatterer interferometry (El Papiol, Catalonia, Spain)

“…As for landslide monitoring, there are several PSI works that cover broad areas; see Righini et al (2012), Strozzi et al (2013) and Wasowski and Bovenga (2014). In addition, there are several studies focused on single large landslides; see Fruneau et al (1996), Colesanti et al (2003), Hilley et al (2004), Crosetto et al (2013) and Tofani et al (2014).…”