Cross-application used to validate landslide susceptibility maps using a probabilistic model from Korea |
| |
| Authors: | Hyun-Joo Oh Saro Lee |
| |
| Institution: | (1) Geoscience Information Center, Korea Institute of Geoscience and Mineral Resources (KIGAM), 92, Gwahang-no, Yuseong-gu, Daejeon, 305-350, Korea; |
| |
| Abstract: | A study of landslides in Youngin, Janghung and Boeun, Korea, using the geographic information system (GIS) validates a spatial
probabilistic model for landslide susceptibility analysis. Locations were identified from aerial photographs, satellite images
and field surveys. Topography, soil-type, forest-cover and land-cover maps were constructed from spatial data sets. Landslide
occurrence is influenced by 13 factors, evidence for which was extracted from the database with the frequency ratio of each
factor computed. Landslide susceptibility maps use frequency ratios derived not only from data for each area but also ratios,
one from the probabilistic model, calculated from the other two areas (nine maps in all) as a cross-check of method validity.
For validation, analytical results were compared in each study area with actual landslide locations: Boeun based on its frequency
ratio showed the best accuracy (82.49%) whereas Janghung based on the Boeun frequency ratio showed the worst (69.53%). |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
