Alexopoulos, J., Dilalos, S., & Vassilakis, E. (2011).
Adumbration of Amvrakia’s spring water pathways, based on detailed geophysical data (Kastraki - Meteora). In
N. Lambrakis, Stournaras, G., & Katsanou, K. (Eds.),
Advances in the Research of Aquatic Environment (Vol. 1-2, Vol. 1, pp. 105-112). Springer.
AbstractThe Amvrakia spring is located at the bottom of Meteora pillars and more specifically near the village of Kastraki (Kalambaka municipality). It is a seasonal spring since it functions only during the wet period. The Meteora conglomerates which dominate the area are characterized by large discontinuities creating a network of groundwater pathways above the impermeable strata of the underlying marls. The research targets was to define these water pathways in order to understand the mechanism of Amvrakia spring, by mapping the exposed discontinuity network and define their underground extension with the contribution of geophysical techniques. Electrical Resistivity Tomography (ERT) and Very Low Frequency (VLF) methodologies were applied. The VLF method is indicated for the detection of water-bearing fracture zones, but before the application of their filters they had to be processed for topographic corrections, as the area had not smooth relief. Five (5) VLF profiles were conducted with different directions around the spring’s area, in order to detect possible conductive zones in the conglomerates surrounding the study area. Moreover, two (2) ERT sections of a total length of 140m were carried out, parallel to existent VLF sections, for crosschecking the geophysical information. Both techniques revealed important conductive zones (<200 Ohm.m) from the south-eastern Meteora conglomerate pillars, possibly interpreted as discontinuities filled with water feeding the spring.
.pdf Fountoulis, I., Vassilakis, E., Mavroulis, S., Alexopoulos, J., & Erkeki, A. (2011).
Quantification of river valley major diversion impact at Kyllini coastal area (W. Peloponnesus, Greece) with remote sensing techniques. In
C. Grützner, Fernández Steeger, T., Papanikolaou, I., Reicherter, K., Silva, P. G., Pérez-López, R., & Vött, A. (Eds.),
2nd INQUA-IGCP-567 International Workshop on Active Tectonics, Earthquake Geology, Archaeology and Engineering (pp. 46-49). Corinth.
AbstractThe effects of the geological, tectonic and neotectonic structure and the impact of the human presence and activity on the drainage network of Pineios river are presented here in order to determine the causes of its diversion and the implications to the shoreline. We used, analyzed and evaluated (a) geomorphological, geological, tectonic and neotectonic data of the study area, (b) historical information and archaeological findings from buried and eroded archaeological sites of the wider study area, (c) published data related to drill cores and radiocarbon dates, and (d) remote sensing datasets, as satellite and aerial photos of different capturing periods, as well as real-time kinematic differential GPS measurements for the definition of the current shoreline. It is concluded that the detected shoreline displacements and drainage diversions are the result of the combination of active tectonics and human activity during the last 100 kyrs.
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