Greif V., Maľa M., Buša J., Bednarik M., Tornyai R., Kušnirák D., Dostál I., Putiška R. & Zvara I., 2025: Integrated monitoring techniques for landslide hazard assessment in Ruská Nová Ves (Eastern Slovakia). Acta Geologica Slovaca, 17, 2, 63–75.

Integrated monitoring techniques for landslide hazard assessment in Ruská Nová Ves (Eastern Slovakia)

Vladimir Greif¹, Martin Maľa¹, Jaroslav Buša², Martin Bednarik¹, Rudolf Tornyai¹, David Kušnirák¹, Ivan Dostál¹, René Putiška¹ & Ivan Zvara¹

¹Comenius University in Bratislava, Faculty of Natural Sciences, Dept. of Engineering Geology, Hydrogeology and Applied Geophysics, Ilkovičova 6, 842 15 Bratislava, Slovakia; vladimir.greif@uniba.sk
²Technical University of Košice, BERG Faculty, Department of Geoscience, Košice, Slovakia

Abstract

The presented research deals with a multidisciplinary approach to the monitoring of an active landslide in Ruská Nová Ves, Slanské Vrchy Mountains (Eastern Slovakia). The kinematic activity of the landslide was studied by classical geotechnical methods - inclinometric measurements and groundwater level monitoring in combination with remote sensing method - Radar Satellite Interferometry (PS InSAR) and shallow geophysical methods - Electrical Resistivity Tomography (ERT) and Electro Magnetic Radiation Method (EMR). The results showed that the detection and determination of the most active parts within the studied landslide using ERT and EMR measurements is consistent with engineering geological investigations. The slope deformation in Ruská Nová Ves was formed on two polygonal shear surfaces at depths of 6.5 m and 11.5 m below the surface with an average displacement rate of 25.0 mm/year for the level 0-6 m below the surface and 18.0 mm/year for the level 6-11 below the surface and determined azimuth of 275°. The shallower shear surface was confirmed by both ERT and EMR methods in contrast to the deeper shear plane located in Neogene clay sediments due to significantly lower resistivity values (ERT) and continuous plastic deformation (EMR). The PS InSAR technique was used for the evolution of landslide displacement permanent scatterers within the landslide area, indicating displacement rates in the satellite line of sight (LOS) direction (VLOS= 24.5 mm/year) and slope direction (KSLOPE= -23.25 mm/year). The results were obtained using borehole inclinometric data series. The results demonstrate how interdisciplinary studies of landslide kinematics contribute to a better understanding of possible landslide trends, especially with significant positive impacts on urbanized areas.

Key words: monitoring, landslide, satellite radar interferometry, borehole inclinometry, EMR

Manuscript received: 2025-11-21

Revised version accepted: 2025-12-23