A focusing approach to ground water detection by means of electrical and EM methods: the case of Paliouri, Northern Greece |
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| Authors: | George Vargemezis Panayiotis Tsourlos Alexandros Stampolidis Ilias Fikos Dimitrios Ballas Nikolaos Papadopoulos |
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| Institution: | 1. Department of Geophysics, School of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
2. Laboratory of Geophysical-Satellite Remote Sensing and Archaeoenvironment, Institute for Mediterranean Studies, Foundation of Research & Technology Hellas, 74100, Rethymno, Crete, Greece
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| Abstract: | In this paper the main results from the implementation and interpretation of a geophysical survey carried out in Chalkidiki (Northern Greece) are presented. The objective of the geophysical survey was to study the general geological conditions of the area (stratigraphy and tectonism) and to focus on the hydrogeological behaviour of the geological formations in the area. The ultimate target was to point out the most promising locations for the successful construction of hydro wells. Since direct hydrogeological information was not available, three different geophysical techniques were applied in order to follow a step by step approach to the exploration of the study area. Firstly, the Very Low Frequency (VLF) electromagnetic method was applied since the majority of the area was dominated by the formation of ophiolites and water flow was possibly expected only in fractured zones at a relatively small depth. Secondly, at the locations of the conductive zones detected by the VLF survey additional Electrical Resistivity Tomography (ERT) sections at different scales were measured to provide more detailed information about the geometrical characteristics of them. Finally, Self-Potential (SP) measurements along the same profiles were conducted in order to provide supplementary information concerning the nature of the conductive zones such as the possible relation with electrokinetic sources. The combined interpretation of the geophysical data proved very efficient for deciding the most promising locations for the construction of hydro wells. |
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