[Society of Exploration Geophysicists and Brazilian Geophysical Society 13th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 26-29 August 2013 - Rio de Janeiro, Brazil (26 August to 29 August)] 13th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 26–29 August 2013 - Estimation of underground fractured aquifers in the region of Eskişehir, Turkey, by using 1D inversion in electrical resistivity data (VES)