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Soil water content and salinity determination using different dielectric methods in saline gypsiferous soil

Bouksila, Fethi LU ; Persson, Magnus LU ; Berndtsson, Ronny LU and Bahri, Akissa (2008) In Hydrological Sciences Journal 53(1). p.253-265
Abstract (Swedish)
Abstract in Undetermined

Measurements of dielectric permittivity and electrical conductivity were taken in a saline gypsiferous soil collected from southern Tunisia. Both time domain reflectometry (TDR) and the new WET sensor based on frequency domain reflectometry (FDR) were used. Seven different moistening solutions were used with electrical conductivities of 0.0053-14 dS m(-1). Different models for describing the observed relationships between dielectric permittivity (K-a) and water content (theta), and bulk electrical conductivity (ECa) and pore water electrical conductivity (ECp) were tested and evaluated. The commonly used K-a-theta models by Topp et al. (1980) and Ledieu et al. (1986) cannot be recommended for the... (More)
Abstract in Undetermined

Measurements of dielectric permittivity and electrical conductivity were taken in a saline gypsiferous soil collected from southern Tunisia. Both time domain reflectometry (TDR) and the new WET sensor based on frequency domain reflectometry (FDR) were used. Seven different moistening solutions were used with electrical conductivities of 0.0053-14 dS m(-1). Different models for describing the observed relationships between dielectric permittivity (K-a) and water content (theta), and bulk electrical conductivity (ECa) and pore water electrical conductivity (ECp) were tested and evaluated. The commonly used K-a-theta models by Topp et al. (1980) and Ledieu et al. (1986) cannot be recommended for the WET sensor. With these models, the RMSE and the mean relative error of the predicted theta were about 0.04 m(3) m(-3) and 19% for TDR and 0.08 m(3) m(-3) and 54% for WET sensor measurements, respectively. Using the Hilhorst (2000) model for ECp predictions, the RMSE was 1.16 dS m(-1) and 4.15 dS m(-1) using TDR and the WET sensor, respectively. The WET sensor could give similar accuracy to TDR if calibrated values of the soil parameter were used instead of standard values. (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
soil salinity, gypsiferous soils, time domain reflectometry (TDR), frequency domain reflectometry (FDR)
in
Hydrological Sciences Journal
volume
53
issue
1
pages
253 - 265
publisher
IAHS Press
external identifiers
  • wos:000253632500017
  • scopus:40349101843
ISSN
0262-6667
DOI
10.1623/hysj.53.1.253
language
English
LU publication?
yes
id
77ac5624-1a2c-4c2e-a8c0-c0f552d3fbe1 (old id 790713)
date added to LUP
2008-01-16 04:47:51
date last changed
2017-07-02 04:11:17
@article{77ac5624-1a2c-4c2e-a8c0-c0f552d3fbe1,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
Measurements of dielectric permittivity and electrical conductivity were taken in a saline gypsiferous soil collected from southern Tunisia. Both time domain reflectometry (TDR) and the new WET sensor based on frequency domain reflectometry (FDR) were used. Seven different moistening solutions were used with electrical conductivities of 0.0053-14 dS m(-1). Different models for describing the observed relationships between dielectric permittivity (K-a) and water content (theta), and bulk electrical conductivity (ECa) and pore water electrical conductivity (ECp) were tested and evaluated. The commonly used K-a-theta models by Topp et al. (1980) and Ledieu et al. (1986) cannot be recommended for the WET sensor. With these models, the RMSE and the mean relative error of the predicted theta were about 0.04 m(3) m(-3) and 19% for TDR and 0.08 m(3) m(-3) and 54% for WET sensor measurements, respectively. Using the Hilhorst (2000) model for ECp predictions, the RMSE was 1.16 dS m(-1) and 4.15 dS m(-1) using TDR and the WET sensor, respectively. The WET sensor could give similar accuracy to TDR if calibrated values of the soil parameter were used instead of standard values.},
  author       = {Bouksila, Fethi and Persson, Magnus and Berndtsson, Ronny and Bahri, Akissa},
  issn         = {0262-6667},
  keyword      = {soil salinity,gypsiferous soils,time domain reflectometry (TDR),frequency domain reflectometry (FDR)},
  language     = {eng},
  number       = {1},
  pages        = {253--265},
  publisher    = {IAHS Press},
  series       = {Hydrological Sciences Journal},
  title        = {Soil water content and salinity determination using different dielectric methods in saline gypsiferous soil},
  url          = {http://dx.doi.org/10.1623/hysj.53.1.253},
  volume       = {53},
  year         = {2008},
}