Cross-hole electrical imaging of a controlled saline tracer injection

Slater, Lee; Binley, Andrew; Daily, William; Johnson, Raymond H.

doi:10.1016/s0926-9851(00)00002-1

Cited by 363 publications

(246 citation statements)

References 15 publications

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“…Detection of these levels of DNAPL induced phase shifts in the field environment, where there are fewer controls and greater noise influences, is likely to be even more problematic. Slater et al (2000) describe an experiment in which time-lapse resistivity model cells were used to produce multiple breakthrough curves describing the movement of a saline tracer through a porous medium. In this study a similar procedure is used to monitor DNAPL migration.…”

Section: Time Lapse Imagingmentioning

confidence: 99%

Noninvasive monitoring of DNAPL migration through a saturated porous medium using electrical impedance tomography

Chambers

Loke

Ogilvy

et al. 2004

Journal of Contaminant Hydrology

113

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Electrical impedance tomography was used to monitor the movement of a fluorinated hydrocarbon DNAPL through a saturated porous medium within a laboratory column. Impedance measurements were made using a horizontal plane of twelve electrodes positioned at regular intervals around the centre of the column. A 2D inversion algorithm, which incorporated the cylindrical geometry of the column, was used to reconstruct resistivity and phase images from the measured data. Differential time-lapse images of DNAPL movement past the plane of electrodes were generated by the cell-bycell subtraction of resistivity and phase baseline models from those associated with the DNAPL release stage of the experiment.The DNAPL pulse was clearly delineated as resistive anomalies in the differential time-lapse resistivity images. The spatial extent of the resistive anomalies indicated that, in addition to vertical migration, some lateral spreading of the DNAPL had occurred. Residual contamination could be detected after quasi-static conditions were re-established. Residual DNAPL saturation was estimated from the resistivity model data by applying Archie's second equation. Despite significant measured phase changes due to DNAPL contamination, the differential phase images revealed only weak anomalies associated with DNAPL flow; these anomalies could be seen only in the initial stages of the experiment during peak flow through the plane of electrodes.

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Section: Time Lapse Imagingmentioning

confidence: 99%

Noninvasive monitoring of DNAPL migration through a saturated porous medium using electrical impedance tomography

Chambers

Loke

Ogilvy

et al. 2004

Journal of Contaminant Hydrology

113

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show abstract

“…The difference between the pair of measurements should ideally be zero and any deviation from zero may give a measure of the quality of the data , "Hydrogeophysical Imaging of Deposit Heterogeneity and Groundwater Chemistry Changes during DNAPL Source Zone Bioremediation"). Assessing errors due to high contact resistances, random instrument errors, and sporadic errors due to background noise is easily conducted using the reciprocal error (Slater et al, 2000, "Cross-hole Electrical Imaging of a Controlled Saline Tracer Injection").…”

Section: Point Electrode Validationmentioning

confidence: 99%

Surface Geophysical Exploration - Compendium Document

Df¹,

Da²

2011

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“…The ease of using the technique makes it effectively applies for different engineering, hydrology, and environmental investigations (Ogilvy et al, 1999;Slater et al, 2000;Marescot et al, 2004). The applications of the electrical resistivity technique in the field of landmine detection are very limited.…”

Section: Electrical Resistivity Modelingmentioning

confidence: 99%

Detection of metallic and plastic landmines using the GPR and 2-D resistivity techniques

Metwaly

2007

Nat. Hazards Earth Syst. Sci.

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Abstract. Low and non-metallic landmines are one of the most difficult subsurface targets to be detected using several geophysical techniques. Ground penetrating radar (GPR) performance at different field sites shows great success in detecting metallic landmines. However significant limitations are taking place in the case of low and non-metallic landmines. Electrical resistivity imaging (ERI) technique is tested to be an alternative or confirmation technique for detecting the metallic and non-metallic landmines in suspicious cleared areas. The electrical resistivity responses using forward modeling for metallic and non-metallic landmines buried in dry and wet environments utilizing the common electrode configurations have been achieved. Roughly all the utilized electrode arrays can establish the buried metallic and plastic mines correctly in dry and wet soil. The accuracy differs from one array to the other based on the relative resistivity contrast to the host soil and the subsurface distribution of current and potential lines as well as the amplitude of the noises in the data. The ERI technique proved to be fast and effective tool for detecting the non-metallic mines especially in the conductive environment whereas the performances of the other metal detector (MD) and GPR techniques show great limitation.

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Cross-hole electrical imaging of a controlled saline tracer injection

Cited by 363 publications

References 15 publications

Noninvasive monitoring of DNAPL migration through a saturated porous medium using electrical impedance tomography

Noninvasive monitoring of DNAPL migration through a saturated porous medium using electrical impedance tomography

Surface Geophysical Exploration - Compendium Document

Detection of metallic and plastic landmines using the GPR and 2-D resistivity techniques

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