Probabilistic landslide susceptibility mapping in the Lai Chau province of Vietnam: focus on the relationship between tectonic fractures and landslides |
| |
| Authors: | Saro Lee Nguyen Tu Dan |
| |
| Institution: | (1) Geosciences Information Center, Korea Institute of Geoscience& Mineral Resources (KIGAM), 30, Gajung-Dong, Yusung-Gu, Daejeon, 305-350, Korea;(2) Hanoi Institute of Oceanography, Vietnamese Academy of Science and Technology (VSAT), No: 18 Hoang Quoc Viet Road, Caugiay, Hanoi, Vietnam |
| |
| Abstract: | This study evaluates the susceptibility of landslides in the Lai Chau province of Vietnam using Geographic Information System
(GIS) and remote sensing data to focus on the relationship between tectonic fractures and landslides. Landslide locations
were identified from aerial photographs and field surveys. Topographic, geological data and satellite images were collected,
processed, and constructed into a spatial database using GIS data and image-processing techniques. A scheme of the tectonic
fracturing of crust in the Lai Chau region was established. Lai Chau was identified as a region with many crustal fractures,
where the grade of tectonic fracture is closely related to landslide occurrence. The influencing factors of landslide occurrence
were: distance from a tectonic fracture, slope, aspect, curvature, soil, and vegetative land cover. Landslide prone areas
were analyzed and mapped using the landslide occurrence factors employing the probability–frequency ratio model. The results
of the analysis were verified using landslide location data and showed 83.47% prediction accuracy. That emphasized a strong
relationship between the susceptibility map and the existing landslide location data. The results of this study can form a
basis stable development and land use planning for the region. |
| |
| Keywords: | Landslide Susceptibility Probability GIS Tectonic fracture Vietnam |
| 本文献已被 SpringerLink 等数据库收录！ |
|
