The Offset System of Electrical Resistivity Sounding and Its Use With a Multicore Cable*†

Barker, R. D.

doi:10.1111/j.1365-2478.1981.tb01015.x

Cited by 169 publications

(93 citation statements)

References 13 publications

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“…The problem, and one common to all electrode arrays, is that lateral near-surface conductivity inhomogeneities occurring near an electrode cause large effects attributable to variations in the vertical distribution of conductivity directly below the center of the array. To overcome this problem, various authors have suggested five electrode arrays to spatiaUy average out these lateral effects (Barker, 1981). For the induced polarization or spectral resistivity techniques, the transmitter generates a broadband signal either in the time domain or at discrete frequencies up to about I kHz.…”

Section: Inducedmentioning

confidence: 99%

Expedited Site Characterization geophysics: Geophysical methods and tools for site characterization

Goldstein¹

1994

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Section: Inducedmentioning

confidence: 99%

Expedited Site Characterization geophysics: Geophysical methods and tools for site characterization

Goldstein¹

1994

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“…Improvement in resistivity methods using multi-electrode arrays has led to an important development in electrical imaging for subsurface surveys (Barker 1978;Griffiths and Turnbull 1985;Griffiths et al 1990;Barker 1992;Griffiths and Barker 1993). Such surveys are usually carried out using a large number of electrodes connected through a multi-core cable.…”

Section: Electrical Resistivity Imaging (Eri) Methodsmentioning

confidence: 99%

Integrated studies for characterization of lineaments used to locate groundwater potential zones in a hard rock region of Karnataka, India

et al. 2006

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An integrated study was carried out to investigate the subsurface geological conditions in a hard rock environment, with the aim of identifying zones with groundwater resource potential. The study, in Bairasagara watershed, Karnataka, India, considered geomorphology, water level, resistivity imaging, self potential, total magnetic field and susceptibility. The signatures due to lineaments have been clearly identified and their role in groundwater movement has been documented. Synthetic simulation methods were used to model the electrical response of the lineament using finite differential modeling scheme. The inverted image of the field data is compared with the synthetic image and iteration were performed on the initial model until a best match was obtained resulting on the generation of the calibrated resistivity image of the subsurface. Resistivity imaging revealed that the dykes are weathered/fractured to a depth of 6-8 m and are compact at deeper levels, and that they behave as barriers to groundwater movement, yet facilitate a good groundwater potential zone on the upgra- dient side. The results of magnetic surveys were utilized in differentiating granites and dolerite dykes with an insignificant resistivity contrast. Geomorphological expression alone cannot reveal the groundwater potential associated with a lineament. However, characterizing the nature of the feature at depth with integrated geophysical methods provides essential information for assessing that potential.Résumé Uneétude aété réalisée sur la géologique de sub-surface en milieu rocheux fracturé, avec pour objectif l'identification des zones possédant des potentiels de ressource en eau souterraine. Cetteétude, sur le bassin versant de Bairasagara, Karnataka, prend en compte la géomorphologie, le niveau de l'eau, les images de résistivité, le self potentiel, le champ magnétique total et la susceptibilité. Les signaux dusà la présence de linéaments, ontété clairement identifiés ainsi que leur influence sur le mouvement des eaux souterraines. Les méthodes de simulation synthétique ontété utilisées pour modéliser la réponsé electrique des linéaments, en utilisant une modélisation par différences finies. L'image inversée des données de terrain est comparée avec l'image synthétique; des itérations sur le modèle initial ontété mises en oeuvre jusqu'à un rapprochement optimal, résultant en la génération d'une image calibrée de la résistivité de la sub-surface. Les images de résistivités révèlent que les dykes sont altérés et fracturés sur une profondeur de 6à 8 mètres et sont compactésà des profondeurs plus importantes. Les dykes se conduisent dés lors comme des barrières au mouvement des eaux souterraines. Cependant ils favorisent un bon potentiel, du point de vue de la remontée des gradients. Les résultats des levés magnétiques ontété utilisés pour différencier les dykes de granite et les dykes de dolérite avec des contrastes de résistivité trop faibles. L'étude géomorphologique seule n'aurait pu suffireà comprendre le potentiel des eaux s...

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“…Obire et al (2008) show that fertilizer introduction to the land has a negative impact on the quality of groundwater. In conjunction with subsurface investigation, some pioneering work using the geoelectrical resistivity imaging technique was carried out by Barker (1981), Overmeeren van and Ritsema (1988), Griffiths et al (1990), Noel and Walker (1990), Griffiths and Barker (1993). The usefulness of this method for solving a number of geo-environmental problems has been shown by Reynolds (1997), Loke (1999), Abdul Nassir et al (2000) and Baharuddin et al (2009), with different case studies.…”

Section: Introductionmentioning

confidence: 99%

Time lapse chemical fertilizer monitoring in agriculture sandy soil

Islami

Taib

Yusoff

et al. 2011

Int. J. Environ. Sci. Technol.

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Geoelectrical resistivity, hydrogeochemical and soil properties analysis methods were used for chemical fertilizer monitoring in sandy soil at a palm oil plantation in Machang, Malaysia. The time lapse monitoring was done using these methods five times within a three-month period. The hydrogeochemical analysis was conducted over three auger holes to a depth of 1 m and sampled at 25 cm intervals. Chemical fertilizer was applied to the 21 x 21 m 2 area after the first data set measurement. The areas outside of this fertilized zone are considered a nonfertilized zone. The other four data sets were acquired at about equal time intervals, thus giving a four-post fertilization data set. The hydrogeochemical measurements indicate that the cations content are relatively similar for every time lapse measurement. However, relatively higher changes of anions content occur at the surface level to a depth of 1 m. The nitrate concentration above the limit for safe human consumption as it returns to the initial value about 100 days after fertilization. The geoelectrical model prior to fertilization showed similar resistivity values at near surface to a depth of about 75 cm with no significant occurrences of low resistivity values. Lower resistivity values were obtained during the second, third, fourth and fifth measurements within the chemically fertilized zone. In the last measurement, the resistivity values in the fertilized zone are almost similar to the nonfertilized zone. This indicates that the contaminant has dissolved into the surrounding environment within this time period.

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The Offset System of Electrical Resistivity Sounding and Its Use With a Multicore Cable*†

Cited by 169 publications

References 13 publications

Expedited Site Characterization geophysics: Geophysical methods and tools for site characterization

Expedited Site Characterization geophysics: Geophysical methods and tools for site characterization

Integrated studies for characterization of lineaments used to locate groundwater potential zones in a hard rock region of Karnataka, India

Time lapse chemical fertilizer monitoring in agriculture sandy soil

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