Abstract
The monitoring of reservoir-induced landslides is essential for assessing and mitigating the associated geo-environmental hazards. The research utilises the Persistent Scatterer Interferometry (PSI) technique for mapping and monitoring Reservoir-Induced Landslides (RIL). The rim area of the Baglihar Dam Reservoir on the Chenab river (Jammu and Kashmir, India) along National Highway NH-244 is chosen for the analysis. The slope movements are necessarily impacted by the reservoir drawdown effect (RDE) and the rainfall. 46 images from ascending and 70 images from descending track of Sentinel 1C-band SAR satellite have been used for the analysis. Further, ascending and descending results have been combined to estimate the 3D movement. Processing of both the stacks have yielded the Line of Sight (LoS) slope movement along the reservoir rim. The velocities retrieved vary from −95.1 mm/year to +85.1 mm/year. Precipitation was derived from Tropical Rainfall Measuring Mission (TRMM) data, extracted from Google Earth Engine (GEE). The temporal correlation between the displacements and the local precipitation has been qualitatively analysed. The SAR interferometry results were used to identify the active zones.
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