Analysis of February 2023 Thatri Landslide in Doda, Jammu and Kashmir: Insights from Field Observations, Geotechnical Parameters, and GPR Survey

Abstract

Abstract The present study deals with the field observations and results obtained from the Geotechnical investigations and Ground Penetrating Radar survey carried out on Thatri landslide. Thatri township is situated on the left bank of the Chenab River along NH-244, 43 km from district headquarter Doda, Jammu and Kashmir. The landslide occurred on 2nd February, 2023 damaged 21 buildings, affected about 150 people and created situation like Joshimath tragedy. Detailed field investigations on lithology, sub-surface structure determined by GPR investigations and geotechnical parameters of the soil revealed that the leading edge of the slide caused most damage due to cracks developed in the slope wash deposits followed by subsidence and down slope movement of a portion of the township (Nai Basti). The study revealed that percolation of water from soak pits, sewerage, and rain water into the terrace deposits comprising of clays, silt, sand and gravels was the major triggering factors.