Monitoring and Analysis of Displacement Using InSAR Techniques for Gulaba Landslide Site

Abstract

Interferometric Synthetic Aperture Radar (InSAR) is a powerful remote sensing technique which provides high spatial resolution images with continuous temporal coverage of the earth surface data for monitoring of long-term landslide displacement. In the current study over Gulaba Camp in Manalito Marhi (Himachal Pradesh, India) region, a novel approach to monitor the landslide using the ascending and descending InSAR data sets is being implemented. 30 ascending and 23 descending Sentinel-1 Interferometric Wide Swath images spanning the period of 26 months are acquired and processed to identify active landslide sites which have been verified with the ground observations. The combination of the results of ascending and descending path enabled to provide cumulative displacement of 60–100 mm/year over the study period with a velocity of 20–45 mm/year. This study demonstrated multi-temporal InSAR is a useful technique in assessment and monitoring of the landslide and concluded that combining ascending and descending path data has greatly improved the result. Keywords: Landslide, multi-temporal InSAR, baseline, natural hazard Cite this Article Amardeep Singh Virk, Amanpreet Singh, Mittal SK. Monitoring and Analysis of Displacement Using InSAR Techniques for Gulaba Landslide Site. Journal of Remote Sensing & GIS. 2018; 9(2): 37–46p.