A Comparison of the Epikarst of Karst Areas by the Statistical Study of their Resistivity

The epikarst of some karst sample sites were compared. For this the significance of bedrock resistivity values that were obtained by Vertical Electrical Sounding (VES) were determined by t-test. The mean values and standard deviation along the profiles of VES measurement sites were calculated and graphically described. It can be established that the epikarst of profiles with high resistivity mean values is thicker and the epikarst is of heterogeneous cavity formation at sites where the standard deviation of resistivities is high. The epikarst of some karst sample sites can be compared by their standard deviation fields. At sites where the standard deviation fields overlap each other, their epikarsts are similar, at those where they do not overlap each other, they are different from each other and at sites where they touch, their similarity is transitional. In the latter cases, those with higher mean values and higher standard deviation have more cavities and their cavity formation is more heterogeneous. The epikarst with these characteristic features is regarded as more mature. The reliability of comparisons is shown by the fact that those with a more mature epikarst are karstified to a larger degree.