1997
DOI: 10.1190/1.1437549
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Modeling frequency‐dependent GPR

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Cited by 40 publications
(23 citation statements)
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“…The estimated relaxation times for Units 2-5 are within the range of laboratory measurements reported in the literature for saturated sands (e.g. Powers, 1997;Powers and Olhoeft, 1996). The high variability in Units 2/3 and 4 is comparable to the variability caused by introduction of random noise in the synthetic example and the signal to noise for the reflections from the base of these units is substantially lower than that for Unit 5.…”
Section: Field Example: the Boise Hydrogeophysical Research Sitesupporting
confidence: 62%
“…The estimated relaxation times for Units 2-5 are within the range of laboratory measurements reported in the literature for saturated sands (e.g. Powers, 1997;Powers and Olhoeft, 1996). The high variability in Units 2/3 and 4 is comparable to the variability caused by introduction of random noise in the synthetic example and the signal to noise for the reflections from the base of these units is substantially lower than that for Unit 5.…”
Section: Field Example: the Boise Hydrogeophysical Research Sitesupporting
confidence: 62%
“…The dielectric permittivity of soil materials is principally dependent upon moisture content (Annan et al, 1991) and varies with temperature (phase-dependent), density (Daniels, 2004) and frequency (Olhoeft, 1998;Powers, 1997), and these contrasts produce strong and identifiable reflections on most radar records.…”
Section: Ground Penetrating Radarmentioning
confidence: 99%
“…Very little literature on this new topic has been published so far (Taylor et al, 2006;2010), therefore exploring the use of techniques that combine data from multiple sources, in order to achieve inferences on soil property, can be considered an innovative approach. In particular it has not yet been widely investigated how to combine EMI and GPR data for clay content prediction by using geostatistics.…”
Section: Introductionmentioning
confidence: 99%
“…The second term on the left hand side of equation (5) is energy dissipation and it describes electromagnetic diffusion; the third term is energy storage which describes wave propagation (Powers, 1997). For low frequencies (< 20kHz) as commonly used in CSEM surveys, ȁߪ߲۶Ȁ߲‫ݐ‬ȁ is several orders of magnitude larger than ȁ߲߳۶ ଶ Ȁ߲‫ݐ‬ ଶ ȁ.…”
Section: Fundamentals Of the Csem Methodsmentioning
confidence: 99%