Abstract
Nahaew District in northeastern Thailand, where crops out the Cretaceous Khorat Group, is a priority area for landslide hazard assessment through landslide susceptibility and hazard zoning. Through an interpretation of Google Earth imagery, several landslides were mapped to create landslide inventory map. Parameter maps were constructed and compiled into a database with the landslide inventory. The bivariate (frequency ratio) statistical analysis was used to establish landslide susceptibility maps, which were classified into five susceptibility classes. Another approach was landslide hazard zonation. Urban and rural planning and engineering construction need especially hazard zonation map in medium and local scale. GIS and remote sensing techniques have many advantages in the preparation of the map including regional, medium and local scales. In this study, landslide zonation map was prepared using runout model by assigning engineering properties and Digital Elevation Model (DEM) as well as rainfall data. The result was landslide hazard zonation of the area and can be used for urban planning. The report and recommendation have contributed to local authority.
Highlights
Landslide, a significant natural hazard in the high mountain area, has drawn worldwide attention due to increasing awareness of its socioeconomic impacts, as well as, the increasing pressure of urbanization on the mountain environment [1]
The bivariate statistical analysis was used to establish landslide susceptibility maps, which were classified into five susceptibility classes
DMR has been assigned to study about landslide hazard zonation in Na Haew District, Loei Province, NE Thailand
Summary
A significant natural hazard in the high mountain area, has drawn worldwide attention due to increasing awareness of its socioeconomic impacts, as well as, the increasing pressure of urbanization on the mountain environment [1]. Landslide study establishes a significant constraint to development and urban planning. Landslide susceptibility mapping can be the preliminary step in mitigating the damages [2]. Nulay important process for prediction and management of natural disasters. It is a necessary step for integrated watershed management, hazard mitigation, and urban planning in government policies [3] [4]. A landslide susceptibility or hazard map depicts areas likely to have landslides in the future by correlating some of the principal factors that contribute to landslides with the past distribution of slope failures. DMR has been assigned to study about landslide hazard zonation in Na Haew District, Loei Province, NE Thailand
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