Continuous heavy rainfall caused excessive saturation of loose mass leading to development of pore pressure and gully erosion in soil/debris during rainy seasons.

An interim report on Preliminary slope stability assessment of recent disaster affected areas of Pithoragarh District, Uttarakhand by A Bishwapriya, Suptg. Geologist, M V Dhakate and P K Gajbaiye, Sr Geologist, M IV, NR,Dehradun (LHZ/NR/UPUK/2013/056)
UK/Pith/ Thal-Munsyari/SZ/0010
Suitably designed retaining walls with proper drainage arrangements
The major geological causes are presence of loose/unconsolidated mass, excessive saturation of loose mass by surface and subsurface water, development of pore water pressure ultimately resulting in reduction of shear strength of the material and gully er