Mining has been present in the Šalek Valley for about 150 years and is therefore, the most important exogenous geomorphic force in the area. The most obvious geomorphological element in the valley is subsidence of the surface, which is present in the wider area of coal exploitation. One of the typical geomorphological forms of the subsidence process are the ground fissures that are formed at the outskirts of the deformed area. The analysis and observation of these cracks could lead to better environmental management in the influential area of the Velenje coal mine. In the diploma thesis, we found out that with the help of remote sensing products we can identify and monitor cracks and the subsidence basin. By analysing digital elevation models (DEM) recorded at different times, we were able to determine the boundaries of the subsidence basin and determine the role of ground fissures in this basin. With a number of DEM analyses, which are hillshade, Terrain Ruggedness Index-TRI, Topographic position Index-TPI, Aspect and Roughness, we identified cracks and separated them from other geomorphic elements in the area (natural and anthropogenic). The product was a geomorphological map of subsidence elements in the Šalek Lakes area (area in between coordinates (WGS84): 15° 05' 33.77'', 46° 23' 25.90''; 15° 05' 33.69'', 46° 22' 37.32''; 15° 03' 13.35'', 46° 23' 26.00''; 15° 03' 13.30'', 46° 22' 37.41''). Of all analyses, the identification of fissures proved TRI to be the best. However this works most effectively compared to other analyses, such as Senčen relief and TPI, Orthophoto imagery and DEM differences, if available.
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