Slope mass movements in Slovenia are one of the most frequent natural hazards that threaten people and infrastructure and require certain preventative measures in order to prevent possible catastrophic consequences in the event of their triggering.
The bachelor’s thesis focuses on slope mass movements in the area of the Potoška planina, more precisely on the movements of two landslides, Urbas and Čikla, which are located above Koroška Bela near Jesenice. Two landslides represent a potential source area for a debris flow, which can endanger Koroška Bela. For the purpose of better knowledge of the size and condition of the two landslides, geophysical research was carried out by Geoinženiring for a research project. After previous surveys used seismic refraction tomography and 2D electrical tomography, a geophysical method of vertical electrical sounding was used, which has a larger depth penetration. On both landslides, Urbas and Čikla, together, 12 geoelectric soundings were measured. The method has provided data, which allowed the determination of the thickness of gravels, the depth of the shear planes, as well as the definition of the deeper lithological structure of the area.
Based on the results of previous research, which served as the basis for the interpretation of four out of 12 geoelectric soundings for the purpose of the bachelor’s thesis, the depth of the shear plane, the thickness of the gravels, and the deeper lithology for both landslides were determined. On the EPP-11 geoelectric sounding on the Čikla landslide, I determined the depth of the shear plane from 30 m to 35 m below the surface and the thickness of the gravels from 34 m to 39 m. On the Urbas landslide, on the geoelectric sounding EPP-4, which was measured at the location of the geological borehole PP-1, I determined the shear plane at a depth of 15 m below the surface and a thickness of gravels from 10.5 m to 14.5 m. In the case of the EPP-7 geoelectric sounding, the shear plane is in the interval from 14 m to 16 m. The thickness of gravels is from 11.5 m to 13.5 m. On the EPP-8 geoelectric sounding, the shear plane ranges from 9 m to 11 m below the surface and the thickness of the gravels up to 8.5 m.
The results from geophysical surveys will serve as the basis for the further implementation of preventative measures in the area of Potoška planina for the purpose of protecting the inhabitants