Application of Frequency Ratio Method for Landslide Susceptibility Mapping in the Surkhob Valley, Tajikistan

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