In this Master thesis we studied the use of Radar Interferometry (InSAR), specifically Persistent Scatterer Interferometry (PSInSAR), in monitoring ground subsidence in two study areas in Slovenia: the Velenje Basin (mining area of the Velenje Coal Mine) and the Ljubljana Marshes (Brest waterworks). Both areas are characterized by significant anthropogenic influences – underground mining and groundwater extraction. The theoretical part outlines the key principles of the InSAR technique, the advantages and limitations of PSInSAR, and provides a detailed description of the applied methodology, study areas and data. Radar satellite images from the Sentinel-1 mission were used, and interferometric processing for the Velenje Basin was carried out using ENVI SARscape for the period 2019–2023. These results were compared with data from a previously performed processing using SNAPPING software for the period 2017–2021, with products from the European Ground Motion Service (EGMS), and with results from other geodetic methods – LiDAR and classical terrestrial surveys of the observation network. We analysed the density of persistent scatterers based on the software used and the coherence threshold, as well as displacement velocities (in mm/year) in the line-of-sight (LOS) and vertical directions. ArcGIS Pro and Microsoft Excel were used for the visualization of time series. In the Ljubljana Marshes, the results of SNAPPING and EGMS were only discussed and are presented in the final part of the thesis. The findings indicate that subsidence in the Velenje Basin is more intense than in the Ljubljana Marshes. The overall analysis confirms the usefulness of radar interferometry for long-term monitoring of ground subsidence and its potential as a complementary technique to traditional geodetic methods in spatial planning, infrastructure and environment protection.
|
