Analysis on topological change during full-scale debris flow test using UAV-LiDAR

Abstract

Landslide and debris flow cause considerable damages to human lives and infrastructures. South korea is at high risk of landslides as 70% of the country is made up of mountains and various erosion control projects are being implemented to prevent damages from these geohazards. In this study, full-scale debris flow test was conducted and terrain displacement before and after debris flow was observed using LiDAR and RGB point clouds. The largest displacement was observed near the structure located upstream. This result can provide technical information for erosion control structure design and establishment of erosion control plan.