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1 wrz 2001 · This paper presents the electrical resistivity component of an undergraduate geophysics course at Radford University. It is taught from a physics perspective, yet the application of the...
Electrical methods utilize direct current or Low frequency alternating current to investigate electrical properties of the subsurface. Electromagnetic methods use alternating electromagnetic field of high frequencies.
2. Electrical resistivity methods The resistivity method is used in the study of horizontal and vertical discontinuities in the electrical properties of the ground. It utilizes direct currents or low frequency alternating currents to investigate the electrical properties (resistivity) of the subsurface.
Consider a cylinder of length L and cross section A that carries a current I. where ρ is the electrical resistivity of the material (ohm-m). This is the resistance per unit volume and is an inherent property of the material.
We describe the construction and testing of a simple and efficient low-cost resistivimeter designed for use in practical classes in Applied Geophysics. The equipment was successfully tested in a vertical electrical sounding (VES) performed on sandy terrain within the campus of the Universidade Federal de Sergipe, Brazil.
In this paper, the electric resistivity technique proved to be successful method for mapping of Quaternary aquifer conditions in the East Nile Delta, Egypt and in Wadi Ham, United Arab Emirates (UAE).
Chapters 5 and 6 explain electrical resistivity tomography applications for aquifer characterisation and help identify suitable recharge locations for two case studies.
