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Evaluation of the WET sensor compared to time domain reflectometry

Hamed Abd El Mageed, Yasser LU ; Samy, Ghada and Persson, Magnus LU (2006) In Hydrological Sciences Journal 51(4). p.671-681
Abstract
This paper concentrates on the experimental calibration of a rapid, non-destructive sensor to investigate the salinization process by measuring the dielectric properties of the soil to estimate both the soil water content (theta) and pore water electrical conductivity (sigma(p)) for different soil types. The proposed sensor depends on the frequency domain reflectometry (FDR) technique and is called the WET sensor. It estimates the dielectric permittivity (K-a) and bulk electrical conductivity (sigma(a)) of soil. Then, it utilizes both of them to estimate theta and sigma(p). The new sensor is compared to time domain reflectometry (TDR) measurements. Time domain reflectometry is a well established technique for K-a and sigma(a) measurements... (More)
This paper concentrates on the experimental calibration of a rapid, non-destructive sensor to investigate the salinization process by measuring the dielectric properties of the soil to estimate both the soil water content (theta) and pore water electrical conductivity (sigma(p)) for different soil types. The proposed sensor depends on the frequency domain reflectometry (FDR) technique and is called the WET sensor. It estimates the dielectric permittivity (K-a) and bulk electrical conductivity (sigma(a)) of soil. Then, it utilizes both of them to estimate theta and sigma(p). The new sensor is compared to time domain reflectometry (TDR) measurements. Time domain reflectometry is a well established technique for K-a and sigma(a) measurements in soils. The study involves experimental measurements in the laboratory using five different soil types and a range of theta values. In each soil type, three different electrical conductivity solutions (sigma(w)) were used. The results revealed that the calibration coefficients of water content and the soil parameter are significantly dependent on the soil type and slightly affected by electrical conductivity of the moistening solution. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
time, soil salinity, calibration, frequency domain reflectometry (FDR), domain reflectometry (TDR), WET sensor
in
Hydrological Sciences Journal
volume
51
issue
4
pages
671 - 681
publisher
IAHS Press
external identifiers
  • wos:000239562700008
  • scopus:33746852957
ISSN
0262-6667
DOI
10.1623/hysj.51.4.671
language
English
LU publication?
yes
id
74347b4e-c5bf-4465-9cb6-3111c7f6697d (old id 399143)
date added to LUP
2007-10-03 17:40:04
date last changed
2019-10-15 05:00:06
@article{74347b4e-c5bf-4465-9cb6-3111c7f6697d,
  abstract     = {This paper concentrates on the experimental calibration of a rapid, non-destructive sensor to investigate the salinization process by measuring the dielectric properties of the soil to estimate both the soil water content (theta) and pore water electrical conductivity (sigma(p)) for different soil types. The proposed sensor depends on the frequency domain reflectometry (FDR) technique and is called the WET sensor. It estimates the dielectric permittivity (K-a) and bulk electrical conductivity (sigma(a)) of soil. Then, it utilizes both of them to estimate theta and sigma(p). The new sensor is compared to time domain reflectometry (TDR) measurements. Time domain reflectometry is a well established technique for K-a and sigma(a) measurements in soils. The study involves experimental measurements in the laboratory using five different soil types and a range of theta values. In each soil type, three different electrical conductivity solutions (sigma(w)) were used. The results revealed that the calibration coefficients of water content and the soil parameter are significantly dependent on the soil type and slightly affected by electrical conductivity of the moistening solution.},
  author       = {Hamed Abd El Mageed, Yasser and Samy, Ghada and Persson, Magnus},
  issn         = {0262-6667},
  keyword      = {time,soil salinity,calibration,frequency domain reflectometry (FDR),domain reflectometry (TDR),WET sensor},
  language     = {eng},
  number       = {4},
  pages        = {671--681},
  publisher    = {IAHS Press},
  series       = {Hydrological Sciences Journal},
  title        = {Evaluation of the WET sensor compared to time domain reflectometry},
  url          = {http://dx.doi.org/10.1623/hysj.51.4.671},
  volume       = {51},
  year         = {2006},
}