Fig. 1: Debris Flow Trajectories Across Susceptibility Zones.
From: Predicting debris flow pathways using volume-based thresholds for effective risk assessment
a Landslide inventory of Kerala for the 2018 storm event. It represents 4728 landslides where red represents the commonest type- debris flow, blue is shallow slide, and green is rock fall. b The catastrophic debris flow at Pettimudi in the Western Ghats overlaid with the Geographic Information System Tool for Infinite Slope Stability Analysis (GIS-TISSA) susceptibility map. The initiation of the flow was in the high susceptible zone but the run-out occupied even the medium and low susceptible zones. c Pancharakolli debris flow in Wayanad district, which followed the stream channel (SC-type). d Kattippara debris flow in Malappuram district, following a steepest hillslope (SH-type). The mismatch between the original and derived streams could be due to the low-resolution of the freely available elevation data (Image source: Google Earth; Software used for stream extraction (c, d): ArcGIS 10.2).
