<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alexopoulos, John D.</style></author><author><style face="normal" font="default" size="100%">Vassilakis, Emmanuel</style></author><author><style face="normal" font="default" size="100%">Dilalos, Spyridon</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Combined geophysical techniques for detailed groundwater flow investigation in tectonically deformed fractured rocks</style></title><secondary-title><style face="normal" font="default" size="100%">Annals of Geophysics</style></secondary-title><short-title><style face="normal" font="default" size="100%">Combined geophysical techniques for detailed groundwater flow investigation in tectonically deformed fractured rocks</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">3D modelling</style></keyword><keyword><style  face="normal" font="default" size="100%">Applied Geophysics</style></keyword><keyword><style  face="normal" font="default" size="100%">Electrical tomography</style></keyword><keyword><style  face="normal" font="default" size="100%">hydrogeology</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><number><style face="normal" font="default" size="100%">6</style></number><volume><style face="normal" font="default" size="100%">56</style></volume><pages><style face="normal" font="default" size="100%">1-7</style></pages><isbn><style face="normal" font="default" size="100%">2037-416X|escape}</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In this paper we present a combination of several near surface geophysicalΒ&amp;nbsp;investigation techniques with high resolution remote sensingΒ&amp;nbsp;image interpretations, in order to define the groundwater flow pathsΒ&amp;nbsp;and whether they can be affected by future seismic events. A seasonalΒ&amp;nbsp;spring (Amvrakia) located at the foot of Meteora pillars near the villageΒ&amp;nbsp;of Kastraki (Greece) was chosen as a test site. The Meteora conglomeraticΒ&amp;nbsp;formations crop out throughout the study area and areΒ&amp;nbsp;characterized by large discontinuities caused by post Miocene till presentΒ&amp;nbsp;tectonic deformation [Ferriere et al. 2011, Royden and PapanikolaouΒ&amp;nbsp;2011]. A network of groundwater pathways has been developedΒ&amp;nbsp;above the impermeable marls underlying the conglomeratic strata. OurΒ&amp;nbsp;research aims to define these water pathways in order to investigate andΒ&amp;nbsp;understand the exact mechanism of the spring by mapping the exposedΒ&amp;nbsp;discontinuity network with classic field mapping and remote sensingΒ&amp;nbsp;image interpretation and define their underground continuity with theΒ&amp;nbsp;contribution of near surface geophysical techniques. Five Very Low FrequencyΒ&amp;nbsp;(VLF) profiles were conducted with different directions aroundΒ&amp;nbsp;the spring aiming to detect possible conductive zones in the conglomeraticΒ&amp;nbsp;formations that the study area consists of. Moreover, two ElectricalΒ&amp;nbsp;Resistivity Tomography (ERT) sections of a total length of 140m wereΒ&amp;nbsp;carried out parallel to the VLF profiles for cross-checking and verifyingΒ&amp;nbsp;the geophysical information. Both techniques revealed important conductiveΒ&amp;nbsp;zones (&amp;lt;200 Ohm m) within the conglomerate strata, which weΒ&amp;nbsp;interpret as discontinuities filled with water supplying the spring, whichΒ&amp;nbsp;are quite vulnerable to displacements as the hydraulic connections betweenΒ&amp;nbsp;them might be easily disturbed after a future seismic event.</style></abstract><notes><style face="normal" font="default" size="100%">Applied Geophysics; Electrical tomography; hydrogeology; 3D modellingAnnals of Geophysics6</style></notes></record></records></xml>