this site has not been updated since 2017... visit us @ landviser.com to learn about new products and services!
theory
Electrical properties of soils
Submitted by landviser on Tue, 05/14/2013 - 17:39- Login or register to post comments
- Google Scholar
- BibTex
- RIS
Выявление и оценка неоднородности и анизотропии почв лесных биогеоценозов полевыми экспресс-методами измерения электрического сопротивления
Submitted by landviser on Tue, 05/14/2013 - 17:39- Login or register to post comments
- Google Scholar
- BibTex
- RIS
Анизотропия свойств некоторых антропогенно-преобразованных почв подзолистого типа
Submitted by landviser on Tue, 05/14/2013 - 17:38- Login or register to post comments
- Google Scholar
- BibTex
- RIS
Anisotropy of the properties of some anthropogenically transformed soils of podzolic type
Submitted by landviser on Tue, 05/14/2013 - 17:38Instrumentation, Electrical Resistivity (Solid Earth Geophysics Encyclopedia)
Submitted by landviser on Wed, 09/26/2012 - 16:53Our unique LandMapper device was featured in 2nd edition of Solid Earth Geophysics Encyclopedia as the best small scale portable and accurate electrical resistivity/conductivity meter. To cite this publication use:
The PDF of the article is attached to this webpage. Continue reading excert from the Encyclopedia....
"...............
Instrumentation, Electrical Resistivity
- Electrical survey. Mapping subsurface resistivity by injecting an electrical current into the ground.
- Resistivity meter. An instrument used to carry out resistivity surveys that usually has a current transmitter and voltage-measuring circuitry.
- Electrode. A conductor planted into the ground through which current is passed, or which is used to measure the voltage caused by the current.
- Apparent resistivity. The apparent resistivity is the resistivity of an equivalent homogeneous earth model that will give the same potential value as the true earth model for the same current and electrodes arrangement.
- Multi-core cable. A cable with a number of independent wires.
Introduction
The resistivity survey method is more than 100 years old and is one of the most commonly used geophysical exploration methods (Reynolds, 1997). It has been used to image targets from the millimeter scale to structures with dimensions of kilometers (Linderholm et al., 2008; Storz et al., 2000). It is widely used in environmental and engineering (Dahlin, 2001; Chambers et al., 2006) and mineral exploration (White et al., 2001; Legault et al., 2008) surveys. There have been many recent advances in instrumentation and data interpretation resulting in more efficient surveys and accurate earth models. In its most basic form, the resistivity meter injects a current into the ground through two metal stakes (electrodes), and measures the resulting voltage difference on the ground surface between two other points (Figure 1). The current (I) and voltage (V) values are normally combined into a single quantity, the apparent resistivity, which is given by the following relationship:
Locations
