First Land Application of the Differential Electrical Dipole Method together with Transient Electromagnetics

Lippert, K.; Tezkan, B.; Boekmann, J.; Haroon, Amir

doi:10.3997/2214-4609.201802501

Cited by 1 publication

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“…; Lippert et al . ), whereas Araújo et al . ,b,) showed partial results of DNME applied to groundwater exploration.…”

Section: A Review Of Focused Source Electromagnetic and Differentiallmentioning

confidence: 93%

“…A similar technique so-called differential electric dipole (DED) was applied to groundwater investigations Lippert et al 2018), whereas Araújo et al 2017a,b,) showed partial results of DNME applied to groundwater exploration. Differently of FSEM and DNME, the DED current pattern is directly of differential nature through threeelectrodes transmitter and no further post-processing steps are required to obtain the increased focus underneath the transmitter/receiver .…”

Section: A R E V I E W O F F O C U S E D S O U R C E E L E C T R O M mentioning

confidence: 99%

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Improved imaging of a karst aquifer using focused source electromagnetic and differentially normalized method: a qualitative analysis

Araújo

Hindi

Rigoti

et al. 2019

Geophysical Prospecting

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Geophysical investigations using conventional techniques applied to groundwater exploration can often present strong limitations involving high financial costs, complex acquisition logistics and high ambiguity in results. Dispersion of the electric current flow, induced polarization) effects, cultural noises and shallow lateral heterogeneities represent the main problems faced by geoelectric methods in these types of surveys. Moreover, elements such as intrusions and mineralization at different depths may be responsible for signal attenuation as well as high resistivity in unsaturated zones and complex three‐dimensional formations or clayey zones cause variations in the electric current. The focused source electromagnetic and differentially normalized method approaches can help to solve some these issues. Aiming at a higher signal‐to‐noise ratio, the focused source electromagnetic method and approaches of the differentially normalized method, first applied to petroleum exploration, are tested on a groundwater target, in a karst environment sectioned by a diabase dyke. We performed the processing and analysis on real IP resistivity profiling data acquired with two‐way dipole‐dipole array, guided by magnetic data acquired on the same profile, mapping a diabase dyke. The inversion of focused source electromagnetic method/differentially normalized method was not performed, instead that we converted the induced polarization–resistivity data to a differential signal to qualitatively prove the presence of aquifer. Joint interpretation of focused source electromagnetic method curves and inverted two‐dimensional induced polarization–resistivity sections allowed for precise delineation of a conductive zone associated with the karst aquifer, le magnetics allowed for the definition of a neighbour dyke. The techniques have great potential in the aid of groundwater exploration, contributing substantially to the reduction of interpretation ambiguity. Focused source electromagnetic method/differentially normalized method/ approaches show that a simple linear combination of the conventional geoelectric data is able to remove the geological noise and provide the vertical focusing of the electric current.

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“…; Lippert et al . ), whereas Araújo et al . ,b,) showed partial results of DNME applied to groundwater exploration.…”

Section: A Review Of Focused Source Electromagnetic and Differentiallmentioning

confidence: 93%

Section: A R E V I E W O F F O C U S E D S O U R C E E L E C T R O M mentioning

confidence: 99%

Improved imaging of a karst aquifer using focused source electromagnetic and differentially normalized method: a qualitative analysis

Araújo

Hindi

Rigoti

et al. 2019

Geophysical Prospecting

View full text Add to dashboard Cite

show abstract

First Land Application of the Differential Electrical Dipole Method together with Transient Electromagnetics

Cited by 1 publication

References 0 publications

Improved imaging of a karst aquifer using focused source electromagnetic and differentially normalized method: a qualitative analysis

Improved imaging of a karst aquifer using focused source electromagnetic and differentially normalized method: a qualitative analysis

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