Abstract
Direct current (dc) resistivity methods use artificial sources of current to produce an electrical potential field in the ground. In almost all resistivity methods, a current is introduced into the ground through point electrodes (C1, C2) and the potential field is measured using two other electrodes (the potential electrodes P1 and P2), as shown in Fig. 4.3-1. The source current can be direct current or low-frequency (0.1 – 30 Hz) alternating current. The aim of generating and measuring the electrical potential field is to determine the spatial resistivity distribution (or its reciprocal - conductivity) in the ground. As the potential between P1 and P2, the current introduced through C1 and C2, and the electrode configuration are known, the resistivity of the ground can be determined; this is referred to as the “apparent resistivity”.
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Seidel, K., Lange, G. (2007). Direct Current Resistivity Methods. In: Environmental Geology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74671-3_8
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DOI: https://doi.org/10.1007/978-3-540-74671-3_8
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