Influence of geological structure and geomorphological features on landslides in the Pokut Carpathians

Abstract

Summary The article presents the results of field expeditionary research, which identified and analyzed landslides in the Pokut Carpathians. Sixteen large landslides located in both the lowland and middle midland parts of the Pokut Carpathians have been recorded. Their size, shape and time of occurrence are investigated in detail and characterized. The causes of their occcurance are identified, the main of which are geological and geomorphological features and the nature, as well as the intensity of precipitation and groundwater. It is determined that landslides are usually confined to the structural and tectonic zones of the Pokut Carpathians and Pre-Carpathians and the boundaries of natural territorial complexes of different taxonomic ranks (localities, systems, tracts). Landslide-prone areas are mainly steep slopes with the spread of clay deposits of the Carpathian flysch, mainly steep and very steep ridge slopes, steep riverbed slopes of river valleys and water catchments. The most common are landslides, where large volumes of rocks, soil and plants slide down the slope. After analyzing the results of field expeditionary research and literary and cartographic materials, the areas of localization of existing landslides and the places of occurrence of probable landslide-prone areas were determined.