Speleogeneza je proces nastajanja, razvoja in izginjanja jam. Zaključni stadij razvoja jame imenujemo brezstropa jama. Proučevanje le-teh nam lahko pomaga pri razumevanju krasa in kraških pojavov. ...Ker so brezstrope jame ali kotanje na površju ali le zaplate nekraških sedimentov z bujnejšim rastjem, v članku preučujemo možnosti kabinetnega prepoznavanja teh pojavov na podlagi njihovih morfometričnih lastnosti in spektralnih lastnosti vegetacije, ki jih prerašča. Raziskava je osredotočena na širše območje Podgorskega krasa v jugozahodni Sloveniji.
An algorithm of automated karst depression recognition uses a digital terrain model (DTM) and mainly applies the methods of a moving window with a kernel size of 3 3 cells using focal functions. It ...is divided into four parts: watershed calculation, depression delineation, higher level depression delineation and elimination of non-karst depressions. The essential part of the algorithm is the delineation of depression by the elevation of the lowest border cell of watershed. Depressions at higher levels are recognised by filling previously recognised depressions. The performance of algorithm was tested on test area in the Kras region (Slovenia) using DTMs with a spatial resolution of 12.5 m and 3 m. The results mainly depend on the DTM characteristics and quality, especially of their spatial resolution.
Rakov Škocjan is a basin in a small karst plain comprising the Rak Valley and the small basin Podbojev Laz. Bedrock terraces in the basin slopes indicate flattening of the basin floor at the water ...table level at higher elevations and progressive basin development and transformation with surface water flow. Detailed studies of the surface and subsurface karst features in Rakov Škocjan made it possible to describe the basin’s evolution and its development in previous genetic stages. The study (‘Geomorphological Characteristics of Rakov Škocjan‘) based on detailed morphographic mapping, collection of morphometric data, speleological analyses, and granulometric analyses of loamy sediments. A synthesis of the findings shows that the basin’s genesis and development was much more complex than described in earlier literature. The basin was formed as a surface karst feature through several development stages in which the locations of springs and ponors had changed. Morphogenetic characteristics resulted in an exceptional variety of karst phenomena in a small area, although the basic water course in the broader regional sense did not significantly change.
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