ABSTRACT
In the valley of the Surkhob River, manifestations of modern geological
processes, characterized by various forms of manifestation, are widely
developed. Studying these processes is of utmost importance, primarily
landslides, which are directly related to the loss of stability of rocks on the
slopes. Landslide processes in the Surkhob River valley, regardless of their
type, cause significant economic damage to the population and the economy, as
well as negatively impacting human living conditions. The primary goal of this
project is to map landslide susceptibility using a geographic information
system and quantitative and semi-quantitative methods. Landslide susceptibility
assessment of this research was conducted using slope (degree), aspect of the
slope, curvature, stream power index, topographic wetness index, precipitation
and altitude. Except for precipitation, which was collected from the world
climate site, most of the causal elements were derived from DEM from the SRTM
(Shuttle Radar Topography Mission) database, with cell sizes of 30 m. 416
landslides were discovered from satellite pictures of Google Earth Pro and then
validated in the field to analyses the link between causative factors and
landslide inventory. To measure the weights of each causal element, the
frequency ratio (FR) and the analytical hierarchy process (AHP) were used. The
quality of the landslide susceptibility map was determined using the Receiver
Operating Characteristics curve (ROC), and the AUC value was determined to be
0.877. It is possible to use the landslide susceptibility map as an engineering
and geological basis for establishing a national economic development plan for
the territory of the Surkhob River valley.