Prospecção de água subterrânea no Novo Repartimemto-Pa aplicando métodos elétricos e eletromagnéticos

This geophysical study was carried out in the municipility of Novo Repatimento,localized in SW of the Pará state, with the objetive to detect fracture zones in the Pre-Cambrian basement to exploit groundwater. For this purpose were employed Vertical Eletrical Soundings (VES), Radial Soundings (RVES), Eletrical profiling, Very Low Frequency EM(VLF) and Horizontal Loop Eletromagnetic (HLEM) methods. Two types of aquifers were identified as a result of this study. (1) the fracture zones in the crystaline basement and, (2) the unconfined aquifer in the overbunden sediments. This unconfined aquifer is very limited in groundwater resounces due to its limited thickness, generally less than 4m. The fracture directions in the crystalline basement were inicially determined by RSEV and subsequently the condutor axes were localized by the HLEM profilings. Three of these HLEM profililes were run by VLF and eletric profilings. Eight conductor axes are identified which are probabely related to the fracture zones.The fracture zones are potentially a good groundwater supplier zones in this geological context.