Analysing the Influencing Factors of a Postgenetic Subsidence Doline’s Development Using Model Experiments

Szilárd Vetési-Foith (Faculty of Sciences, University of Pécs, 7624, Hungary)


The subsidence dolines are the most common surface forms of the concealed karsts. One type of these dolines is the suffosion doline. In thismodel experiment the influential role of these kind of dolines’ development factors were analyzed. The aim of the study was to determine thesignificance of the parameters (cover thickness, secondary porosity of thebedrock, chimney diameter, grain size) that influence the development ofa suffosion doline. To study the influencing factors numerous (162) experiments were made with different parameters, in a manner that during theexperiments we changed only one parameter, so the effects of it would bedetectable from the final solution. These measurements were made withthe use of a special tool, designed and built for this purpose. Accordingto the data we gained from the model experiments, the development of asuffosion doline is influenced by many parameters. If these parameters arein an optimal connection to each other, a suffosion doline may appear onthe surface. Knowing these parameters of the covered karstic depressionslets us estimate other parameters that may influence the development ofthe subsidence dolines.


Model experiment ;Subsidence doline ;Influencing factors; Connection between the parameters ;Estimating other parameters

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