Environmental Sciences Commons^™

A Geomorphological Model For Landslide Detection Using Airborne Lidar Data, Jin-King Liu, Kuo-Hsin Hsiao, Peter Tian-Yuan Shih

Journal of Marine Science and Technology

This study analyzes multi-temporal LiDAR data of high accuracy and high resolution by installing a geomorphometric model for extracting landslides. First, two sets of LiDAR data were acquired for before and after a heavy rainfall event. The landslides which took place from 2005 to 2009 were classified automatically by satellite images, and subsequently the landslides were interpreted and edited manually. Geomorphometric parameters including slope, curvature, OHM, OHM roughness, and topographic wetness index were then extracted using stencils of landslide polygons overlaid on respective thematic maps derived from LiDAR, DEM and DSM. The ranges of every parameter were derived from the …