Debris Flow  occurred at Painavu, Thodupuzha- Puliyamala NH road side on 15th August 2018 where vegetation washed out which caused road blockage. The runout material had gone upto the reservoir level. Mainly due to reduction of strength on super saturat
Initiated as a plannar failure debris slide graded as debris flow.
PAINAVU
Thodupuzha-Puliyamala road
Removal of accumulated debris over the natural bench. Natural drainage should be maintained and lined road side  drains has to be provided to divert seepage of nala. Damage retaining wall  has to be recounstructed .
Reduction of strength on super saturation due to excess pore water pressure and cutting of toe for road construction and failure caused along weathered rock overburden contact.