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Evaluating the linear dielectric constant-electrical conductivity model using time-domain reflectometry

Persson, Magnus LU (2002) In Hydrological Sciences Journal 47(2). p.269-277
Abstract
Recently, Hilhorst (2000) presented a theoretical model describing a linear relationship between bulk electrical conductivity, sigma(a), and dielectric constant, K-a, in moist soil. Hilhorst (2000) found that using this linear relationship, measurements of the pore water electrical conductivity, sigma(p), can be made in a wide range of soil types without soil-specific calibrations. If accurate measurements were to be made, only one parameter had to be optimized. In the present study, the linear model was evaluated using detailed time-domain reflectometry (TDR) measurements in coarse sand, medium sand and loamy sand. It was shown that the measured slope of the linear model was lower than expected. A reason for this might be that the K-a of... (More)
Recently, Hilhorst (2000) presented a theoretical model describing a linear relationship between bulk electrical conductivity, sigma(a), and dielectric constant, K-a, in moist soil. Hilhorst (2000) found that using this linear relationship, measurements of the pore water electrical conductivity, sigma(p), can be made in a wide range of soil types without soil-specific calibrations. If accurate measurements were to be made, only one parameter had to be optimized. In the present study, the linear model was evaluated using detailed time-domain reflectometry (TDR) measurements in coarse sand, medium sand and loamy sand. It was shown that the measured slope of the linear model was lower than expected. A reason for this might be that the K-a of the pore water is smaller than that of free water due to the presence of bound water. The results showed that the linear model was as good as other commonly used models for sigma(p) predictions. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
time-domain reflectometry, dielectric, Sigma probe, constant, electrical conductivity
in
Hydrological Sciences Journal
volume
47
issue
2
pages
269 - 277
publisher
IAHS Press
external identifiers
  • wos:000175177500008
  • scopus:0036538089
ISSN
0262-6667
language
English
LU publication?
yes
id
5a96756c-1d73-454f-8228-f66c0b8a9047 (old id 339976)
date added to LUP
2007-11-08 14:13:39
date last changed
2017-07-02 04:26:30
@article{5a96756c-1d73-454f-8228-f66c0b8a9047,
  abstract     = {Recently, Hilhorst (2000) presented a theoretical model describing a linear relationship between bulk electrical conductivity, sigma(a), and dielectric constant, K-a, in moist soil. Hilhorst (2000) found that using this linear relationship, measurements of the pore water electrical conductivity, sigma(p), can be made in a wide range of soil types without soil-specific calibrations. If accurate measurements were to be made, only one parameter had to be optimized. In the present study, the linear model was evaluated using detailed time-domain reflectometry (TDR) measurements in coarse sand, medium sand and loamy sand. It was shown that the measured slope of the linear model was lower than expected. A reason for this might be that the K-a of the pore water is smaller than that of free water due to the presence of bound water. The results showed that the linear model was as good as other commonly used models for sigma(p) predictions.},
  author       = {Persson, Magnus},
  issn         = {0262-6667},
  keyword      = {time-domain reflectometry,dielectric,Sigma probe,constant,electrical conductivity},
  language     = {eng},
  number       = {2},
  pages        = {269--277},
  publisher    = {IAHS Press},
  series       = {Hydrological Sciences Journal},
  title        = {Evaluating the linear dielectric constant-electrical conductivity model using time-domain reflectometry},
  volume       = {47},
  year         = {2002},
}