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Joint Evaluation of Electromagnetic and Electric Methods for Groundwater Exploration
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 10th International Congress of the Brazilian Geophysical Society, Nov 2007, cp-172-00024
Abstract
Electrical and electromagnetic methods jointly used and evaluated for hydro-geological investigation. Geoelectrical sections and porosity approximation helps to identify possible well locations. A survey conducted in Itapiúna (Ceará) using direct current<br>resistivity method and two-loop electromagnetic method. Jointly evaluation of result from two dimensional modelling of direct current resistivity data and the result of empirical one-dimensional modelling of two-loop electromagnetic data maps lateral variations and provides valuable depth information to locate drillings. Results also indicate that fracture zones with and without water can be traced. As a result of experimental works, a number of drilling locations were proposed. Some of the locations already had wells in use.