Monitoring and identifying ground movements is important in populated areas and areas with infrastructure. Satellite radar interferometry (InSAR) enables the detection of slow ground movements over large areas and extended periods of time. Such data are available across Europe through the European Ground Motion Service (EGMS).
In this research paper, I analysed ground movements in the Javorniški Rovt area using EGMS data. I used the Ortho product for the 2020–2024 period to analyse mean ground velocities in the east–west and vertical directions. I analysed 43 measurement points and mapped them in QGIS. I compared the EGMS results with the susceptibility maps, the geological setting, field observations and precipitation data.
The mean east–west velocities of the analysed points range from −0.4 to 12.6 mm/year, with an eastward component prevailing at most points. Vertical velocities range from −4.1 to 0 mm/year, with negative values recorded at 41 of the 43 points, indicating a prevailing downward component of movement. In parts of the study area, elevated velocities occur in clusters of adjacent points. Comparison with the susceptibility maps showed partial spatial agreement with areas of increased landslide susceptibility, while no clear agreement was observed for rockfalls and debris flows. Higher ground velocities could not be associated with a single geological unit, but much of the area consists of clastic rocks or is covered by deluvial sediments, which may be less favourable in terms of slope stability. Partial spatial agreement was also observed between elevated EGMS velocities and deformations identified during fieldwork. The results indicate the presence of slow slope movements, which can be associated with creep of surficial or weathered materials. EGMS data provide a useful complement to susceptibility maps and field investigations for identifying slow ground movements.
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