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Analysing the influencing factors of a postgenetic subsidence doline’s development using model experiments

Article history Received: 16 June 2020 Accepted: 26 June 2020 Published Online: 30 June 2020 The subsidence dolines are the most common surface forms of the concealed karsts. One type of these dolines is the suffosion doline. In this model experiment the influential role of these kind of dolines’ development factors were analyzed. The aim of the study was to determine the significance of the parameters (cover thickness, secondary porosity of the bedrock, chimney diameter, grain size) that influence the development of a suffosion doline. To study the influencing factors numerous (162) experiments were made with different parameters, in a manner that during the experiments we changed only one parameter, so the effects of it would be detectable from the final solution. These measurements were made with the use of a special tool, designed and built for this purpose. According to the data we gained from the model experiments, the development of a suffosion doline is influenced by many parameters. If these parameters are in an optimal connection to each other, a suffosion doline may appear on the surface. Knowing these parameters of the covered karstic depressions lets us estimate other parameters that may influence the development of the subsidence dolines.