MONITORING OF ARTIFICIAL RESERVOIR INDUCED LANDSLIDES FROM SPACE: A CASE STUDY OF FROM INDIA

Abstract. Monitoring Reservoir-induced landslides is critical for determining and mitigating the geo-environmental risks associated with the artificial reservoir. This paper employs Persistent Scatterer Interferometry (PSI) technique for the mapping and monitoring of Reservoir Induced Landslides in the rim area of Baglihar Dam Reservoir on Chenab river (Jammu and Kashmir, India) along National Highway NH-244. It has been evident that the slope movements are necessarily impacted by the reservoir drawdown effect (RDE) as well as the rainfall. We have utilised 46 Sentinel-1A C-band radar satellite imagery of the study area. The monitoring results have yielded the Line of Sight slope movement along the reservoir rim varies from −97 mm/year to +80 mm/year. The temporal correlation between the displacements and the local precipitation (derived from TRMM using Google Earth Engine) was qualitatively analysed. Two unstable slopes have been identified and monitored.