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Journal of Hydrology, , Vol 0, Issue 0
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The Aggitis karst system, Eastern Macedonia, Greece: Hydrologic functioning and development of the karst structure
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Novel Jean Paul, Dimadi Agoro, Zervopoulou Anna, Bakalowicz Michel,
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Abstract:
SummaryThe Aggitis karst system developed in the marbles of the Rhodope massif. The conditions of the development of its karst drainage network are determined from the geological and geomorphologic settings by means of a microstructural analysis, following Eraso's method. This analysis shows that the karst conduit network intensely developed in the western part of the mountain Falakro where the majority of the open fractures oriented in the same direction as the hydraulic gradient, while the two directions are perpendicular in its eastern part drained by the spring of Drama.The behaviour of the system was analysed by means of hydrodynamic and water geochemical techniques. Despite the extension of the cave system and of the favourable development conditions of conduits, the functioning appears complex, with a significant storage, and a slow infiltration as well as an easy drainage. On the contrary the Drama karst system, characterised by a low variability in its hydrological and geochemical characteristics does not show any karst functioning.In the Aggitis karst system the initial groundwater flow conditions in combination with the aperture planes of which the directions are in agreement with the hydraulic gradient, favoured the rapid development of a drainage network system. The recharge from a large surface catchment area on non-karstic rocks, through swallow holes in a wide polje contributed to increase the groundwater flow through the karst part of the system, facilitating the development of the conduits
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Keywords: area, catchment, catchment area, cave, cave system, complex, conduit, conduits, drainage, drainage network, extension, flow, flow-through, fracture, fractures, gradient, greece, groundwater, groundwater flow, groundwater-flow, holes, hydraulic gradient, hydrodynamic, hydrodynamics, infiltration, its, karst, karst aquifer, karst system, marble, massif, microstructural analysis, mountain, part, plane, polje, recharge, rhodope, rock, rocks, spring, storage, structure, surface, swallow hole, system, variability, water, water geochemistry, western,
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