Debris slide occurred in  Perunkala on 15th August 2018  due to heavy rainfall and the geoscientific cause being the unscientific slope modification for house construction. Reduction of strength on super saturation due to excess pore water pressure and c
crown cracks extended 4-5m behind the crown.
Perumkala
Removal of accumulated material, construction of Gabion walls at two levels with benches. Filling of cracks with locally available material such as Betonite clay and Bitumin. Fill the septic tank.
Unscientific slope modification for house construction. Reduction of strength on super saturation due to excess pore water pressure. Seepage of septic tank of abandant house could have triggered the slide.