Utilização de medidas elétricas e eletromagnéticas para a prospecção de água subterrânea em Jacundá (Pa)

Abstract

The Jacundá city has a public water system supply in its infancy. From the source surface it is not perennial, small flow and serves less than 20% of the population. Open and shallow tube wells are sources of particular use, limited and seasonal. However, the flow of two deep wells, built in the city, gave evidence that alternative underground water could be a good solution for the local supply. This fact gave rise to a geophysical study to determine the deeper strata permeable. We used nine vertical electrical sounding, whose interpretation acceptd was guided by the geophysical results obtained in a hole. As a result, the models of VES's packets identified two distinct layers resistivity: A package higher, more resistive a total thickness less than 30 meters, was associated with the Itapecuru formation which, is predominantly sandy hydrogeological and weak. And the other, a substrate of low resistivity, it was assumed corresponding to the Codó Formation shales. The interpretation of Slingram data support this result. The hydrogeological potential of this second package is in the shale interbedded sandstone, which may mean the solution for the management of water supply in the city.