Tornyai R. & Koudelka D., 2024: Utilisation of airborne laser scanning data in landslide hazard assessment – case study Čadca district, Slovakia. Acta Geologica Slovaca, 16, 2, 107–111.

Utilisation of airborne laser scanning data in landslide hazard assessment – case study Čadca district, Slovakia

Rudolf Tornyai & Dominik Koudelka

Department of Engineering Geology, Hydrogeology and Applied Geophysics, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava; rudolf.tornyai@uniba.sk

Abstract

The objective of this study was to construct a prognostic landslide hazard map in the Čadca district utilising data obtained from airborne laser scanning of the terrain. In the creation of the predictive map, the input parameters were processed in the QGIS environment. These consisted of a DEM 5.0 (digital elevation model of the fifth generation), a map of engineering geological zoning, a database of slope deformations up to the year 2010, and a derivation of DEM 5.0 to obtain a model of elevation, slope angle, and aspect of slopes. The study presents a predictive map of landslide hazard in the Čadca district, together with a database of slope deformations in the area, created using data from airborne laser scanning. The database was also employed for the purpose of verifying the accuracy of the predictive map. To enable a comparison of the accuracy of the predictive map created based on airborne laser scanning data, a predictive map of landslide hazard was also created based on the register of documented slope deformations in Slovakia.

Key words: landslide hazard, slope deformation, DEM 5.0, forecasting

Manuscript received: 2024-11-25

Revised version accepted: 2024-12-13