Extremely fast IP used to delineate buried landfills

Carlson, Norman R.; Mayerle, C. Mauldin; Zonge, Kenneth L.

doi:10.3997/2214-4609.201406378

Cited by 11 publications

(8 citation statements)

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“…In near‐surface applications induced polarization has shown to be especially useful for delineating landfills (e.g., Carlson et al. 1999; Iliceto et al 1999; Dahlin et al 2010), mapping pollutant plumes (e.g., Abu‐Zeid et al 2004; Sogade et al 2006) and in hydrogeological applications (e.g., Martinho and Almeida 2006), where one hopes to be able to estimate hydraulic conductivity (e.g., Hördt et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Improvement in time‐domain induced polarization data quality with multi‐electrode systems by separating current and potential cables

Dahlin

Leroux

2012

Near Surface Geophysics

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Measuring induced polarization in the time domain with relatively compact multi‐channel multi‐electrode systems is attractive because of the simplicity of the procedure and thus its efficiency in the field. However the use of this technique is sometimes discouraged by the bad quality of the measurements in cases of high electrode contact resistances that can render data interpretation infeasible or at least unreliable. It is proposed that capacitive coupling in the multi‐core electrode cables has a significant role in creating this problem. In such cases separation of current and potential circuits by using separate multi‐conductor cable spreads can yield significant improvement in data quality. The procedure is relatively simple and can be implemented with common resistivity and time‐domain IP equipment. We show here three field examples from Southern Sweden, all measured as 2D electrical imaging sections. The first one is an example where the use of a single cable spread is sufficient thanks to moderate electrode contact resistance and high signal levels. The following two examples are from sites where induced polarization measurements could not yield consistent results using only a single multi‐conductor cable spread. Useful results were subsequently obtained by using separate cable spreads. The first example is a 280 m long line measured over an old covered municipal waste deposit where the waste body stands out as a zone of high chargeability. The second example is a 120 m line measured on a sandy glaciofluvial structure that is host to an aquifer of regional importance. The improvement led to discrimination between materials of different grain sizes, with potential bearing for understanding the aquifer. The third example is a 300–400 m line measured across an esker lying on clay till. The improvement led to a clear visualization of the esker and to the identification of a possible fault in the underlying gneissic bedrock. In all cases pseudosections and examples of chargeability decay curves are shown and discussed as tools for assessing data quality. Inversion results are shown together with background geological information and it is concluded that they are in good agreement.

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Section: Introductionmentioning

confidence: 99%

Improvement in time‐domain induced polarization data quality with multi‐electrode systems by separating current and potential cables

Dahlin

Leroux

2012

Near Surface Geophysics

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“…Such cases could possibly be distinguished if we also knew the chargeability of the formation. Initially designed for mining purposes, the induced polarisation method has also long been used in groundwater and environmental applications (Vacquier et al, 1957;Vanhala, 1999;Carlson et al, 1999) 0926-9851/02/$ -see front matter D 2002 Published by Elsevier Science B.V. PII: S 0 9 2 6 -9 8 5 1 ( 0 2 ) 0 0 1 4 8 -9…”

Section: Introductionmentioning

confidence: 99%

Measuring techniques in induced polarisation imaging

Dahlin

Leroux

Nissen³

2002

Journal of Applied Geophysics

123

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Multi-electrode geoelectrical imaging has become very popular and is used for many different purposes. For some of these, the inclusion of IP data would be desirable as it would allow the interpreter to distinguish between, e.g. sand formations with saltwater infiltration and clay formations or help delineate landfills. However, present-day IP measuring techniques require the use of nonpolarisable potential electrodes and special wire layout and are thus cumbersome and expensive. In this paper, we suggest making IP measurements with multi-electrode cables and just one set of steel electrodes. The polarisation potentials on the potential electrodes are corrected for by subtracting the polarisation potential measured when no primary current and no IP signal are present. Test measurements indicate that the polarisation potentials vary slowly and that the correction procedure is feasible. At two sites in southern Sweden, we have compared measurements with only stainless steel electrodes and measurements with both stainless steel and Pb -PbCl nonpolarisable electrodes using one or two sets of multicore cables, respectively. Almost no difference between the two data sets was observed. At one site, the charge-up effect on the potential electrodes was not important, while at the other site, the correction procedure was crucial. Though only two sites have been studied so far, it seems that time-domain IP imaging measurements can be taken with only steel electrodes and ordinary multicore cables. Coupling in the multicore cables has not presented any problems at the investigated sites where grounding resistances were moderate, making the coupling effect small. High grounding resistance sites have not yet been investigated. D 2002 Published by Elsevier Science B.V.

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“…Induced polarisation (IP) is frequently used in the exploration industry to locate and characterise chargeable ore bodies (Bleil, 1953;Sumi, 1959), and has had some success at imaging landfills in the United States (Carlson et al, 1999;Zonge et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Decoupling spectral induced polarisation data based on Cole-Cole parameters

Hatch

2013

ASEG Extended Abstracts

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Extremely fast IP used to delineate buried landfills

Cited by 11 publications

References 0 publications

Improvement in time‐domain induced polarization data quality with multi‐electrode systems by separating current and potential cables

Improvement in time‐domain induced polarization data quality with multi‐electrode systems by separating current and potential cables

Measuring techniques in induced polarisation imaging

Decoupling spectral induced polarisation data based on Cole-Cole parameters

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