Improved measurements of the apparent resistivity for small depths in Vertical Electrical Soundings

Faleiro, E.; Asensio, Gabriel; Moreno, José Luis Ocaña

doi:10.1016/j.jappgeo.2016.05.016

Cited by 10 publications

(16 citation statements)

References 13 publications

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“…Data collection and processing methods: Measurement of geo-electric resistivity uses Vertical Electrical Sounding methodSounding [20][21][22][23][24][25][26][27]. This method can determine the variation of resistivity value of horizontal layer of rock vertically.…”

Section: Methodsmentioning

confidence: 99%

Mapping of the Distribution of Aquifier in KawatunaSub-district, Mantikulore District, Palu

Rusydi¹,

Musa²,

Badaruddin³

et al. 2019

AJWSE

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Background: The condition of the land in Kawatuna Sub-district is dry, with vegetation overgrown only with shrubs. Dry land condition makes people difficult to get clean water sources for their daily needs. Purpose: This research aims to find out the existence of an aquifer and the depth of the aquifer in Kawatuna Sub-district. Method: The method used in this research is Vertical Electrikal Soundin (VES) with Sclumberger Configuration. The measurement is conducted on 10 measuring points. Data is processed using IP2WIN. Result: The result shown by the program is in the form of distribution of resistivity(ρ), thickness (h), and depth (d) of each subsurface layer. Aquifer layer is shown by the resistivity value of 32.15Ωm-48.03 Ωm and formation factor value of 2-5. This layer consists of sands, pebbles, and sandstones. The upper limit of this later is in the depth of 50.05-72.75m, while the lower limit is undetectable. Conclusion: Aquifer layer is distributed to the east and to the west. It can be seen from the depth of aquifer in the west which tends to be shallower than that in the east. Commonly, this layer is located below the impermeable clay layer.

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Section: Methodsmentioning

confidence: 99%

Mapping of the Distribution of Aquifier in KawatunaSub-district, Mantikulore District, Palu

Rusydi¹,

Musa²,

Badaruddin³

et al. 2019

AJWSE

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“…The theoretical foundations on which this work is based have been well established for decades, except for some necessary improvements related to the peculiarities of how some problems are treated [10]. Starting from a current point in a multilayered soil, the Poisson equation for the electric potential must be solved within the layer containing the source and the Laplace equation is used for the other layers, in addition to imposing the boundary conditions at each interface.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Based on the Maxwell equations and using the moments method, the authors of this paper wrote a MatLab code (which contains the appropriate modifications to deal with almost any type of electrode, always within the thin wire approach [10]) that performed all the necessary calculations for multilayered soils.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…which basically considers the electrodes as current point at depth L and reduces to F(a) = 2πa when L → 0 . However, in a recent paper [10], the authors showed that if the bare rods described above are used as electrodes, then the two previous expressions of F(a) for the calculation of the apparent resistivity do not give the correct values of this magnitude for electrode separations of a < 10 L. This issue is very significant because it involves depths that are important, either from the technical or scientific point of view. The incomplete knowledge of the electrical structure at small depths can lead, for example, to significant errors in the calculation of the grounding resistance of the protection systems.…”

Section: Introductionmentioning

confidence: 99%

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Wenner Soundings for Apparent Resistivity Measurements at Small Depths Using a Set of Unequal Bare Electrodes: Selected Case Studies

et al. 2019

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The possibility of using a set of unequal electrodes, within limits, in a Wenner arrangement for the measurement of apparent resistivity at small depths is explored in this paper. A procedure in which only a simple preliminary calibration is necessary to obtain the best measurements of the apparent resistivity is proposed. On the basis of some case studies, a comparison with the usual procedures to obtain the apparent resistivity from resistance measurements is carried out. The results showed that when an unequal set of electrodes was used, the procedure proposed here was the only one that guaranteed the best apparent resistivity values for any value of electrode separation in the Wenner arrangement, especially for those associated with small depths.

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“…According to the T-test for independent samples, no significant difference between AB/2 values was observed (p>0.05), so we decided to use only the apparent resistivity values for AB/2 = 2 m, i.e., a study depth of 0.5 m, ensuring that the value of ρ a is not affected by soil substrate. Measurements of soil ρa are useful in near-surface studies [40], investigating soil contamination [41], and planning and analyzing agricultural experiments [42].…”

Section: Analysis Of the Apparent Resistivity Valuesmentioning

confidence: 99%

Using Electrical Profiling to Determine Soil Petrophysical Parameters in an Agricultural Field

Contreras¹,

Ortiz²,

Peinado-Guevara³

et al. 2017

Pol. J. Environ. Stud.

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The soils of a 10-ha agricultural field in the municipality of Guasave, Sinaloa, were characterized through electrical measurements and determination of petrophysical parameters. An electrical profiling survey for AB/2 = 2 m and 3 m was carried out in the study area. The apparent resistivity, soil moisture, and pore water salinity values were recalculated into petrophysical values using the Petrowin software, resulting in fine (clay+silt) content, and porosity and hydraulic conductivity maps. Using the Bouyoucos method, soil texture was determined for 30 soil samples collected in points matched with EP measurement points. The results of textural analysis indicated that the study area is quite complex, with the presence of eight textures of soil, and soil moisture and groundwater salinity variable in twice and five times, respectively. The fines content values obtained from Petrowin software and the Bouyoucos method were compared showing a high correlation (R = 0.91), giving reliability to fast and inexpensive techniques such as electrical profiling for the determination of the soil petrophysical parameters in extensive agricultural land.

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Improved measurements of the apparent resistivity for small depths in Vertical Electrical Soundings

Cited by 10 publications

References 13 publications

Mapping of the Distribution of Aquifier in KawatunaSub-district, Mantikulore District, Palu

Mapping of the Distribution of Aquifier in KawatunaSub-district, Mantikulore District, Palu

Wenner Soundings for Apparent Resistivity Measurements at Small Depths Using a Set of Unequal Bare Electrodes: Selected Case Studies

Using Electrical Profiling to Determine Soil Petrophysical Parameters in an Agricultural Field

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