Heavy rainfall increases the pore pressure of the overburden and lubricates the road ward dipping contact/interface between two differential weathered basalt. So enhances the instability of the slope by reducing its strength and finally caused slope fail
Rahman, M. A. and Kaur, J., (2020) Macroscale (1:50,000) Landslide Susceptibility Mapping (LSM) in parts of Toposheet nos. 47F/08 and 47F/12in parts of Raigad, Pune,Satara and Ratnagiri districts, Maharashtra.
Vague scar and vegetation cover over the failed surface indicates the incidence is bit older and almost stabilized.
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Varandh Ghat
No remedial measures are required as the slide is almost stabilized.
Highly weathered basalt with moderately weathered basalt lying on steeply dipping hill slope. Road ward dipping contact/interface between these two differential weathered basalt unit act as lubricated surface which decreases the strength of overlying mat