The Gangnani slide of Uttarkashi was triggered due to heavy rainfall.  The loose unconsolidated overburden material/ highly jointed and weathered rockmass resting over steep slope failed due to over saturation by rains and toe erosion/cutting by Bhagirat
Interim Report on Preliminary Slope Stability assessment of the recent disaster affected areas of Uttarkashi district, Uttarakhand by D.P.Dangwal, Sr.Geol., Neetu Chauhan, Mayukhee & T. Ghosh, Geologists, M-IV, NR, Dehradun, (LHZ/NR/UPUK/2013/053)
UK_UTT_NH108_L27
NH-108, Gangnani slide
Constructing breast wall, retaining wall with adequate number of weep holes, lined toe drain, Toe protection by constructing gabion/ crate wall with spurs, geojute followed by plantation
Reduction in shear strength, Steep slope angle, planar and wedge failure, presence of clayey material along foliation plane