Tóm tắt
The purpose of this study is to carry out landslide susceptibility mapping at 1:50,000 scale for Son La Province by applying the Spatial Multi-Criteria Evaluation (SMCE) method. Seven landslide triggering factor maps related to slope, drainage, deap cleavage, lineament, water holding capacity, weathering crust and land cover were used as input data. One landslide inventory map, which one was investigated by field-surveys, was used to check the reliability of the susceptibility map and the SMCE method. The susceptibility map shows that the susceptibility zones of Very High, High, Medium, Low and Very Low cover the area of 2578.26 km2 (18.26% of the total area in the province), 4,517.79 km2 (31.99%), 2,028.47 km2 (14.37%), 2,518.03 km2 (17.84%), and 2,468.34 km2 (17.54%), respectively. The comparision of the susceptibility map with the landslide inventory map points out that more than 65% of the identified landslides are located in the Very High and High susceptibility zones. This proves the accordance between the susceptibility map and the landslide inventory map. Therefore, the susceptibility map is reliable, and the SMCE method is suitable for the study area and can be applied to other areas with similar setting.