CLC number: TU413
On-line Access: 2016-03-07
Received: 2015-03-24
Revision Accepted: 2015-07-08
Crosschecked: 2016-02-29
Cited: 1
Clicked: 5075
Citations: Bibtex RefMan EndNote GB/T7714
Yun Zhao, Dao-sheng Ling, Yun-long Wang, Bo Huang, Han-lin Wang. Study on a calibration equation for soil water content in field tests using time domain reflectometry[J]. Journal of Zhejiang University Science A, 2016, 17(3): 240-252.
@article{title="Study on a calibration equation for soil water content in field tests using time domain reflectometry",
author="Yun Zhao, Dao-sheng Ling, Yun-long Wang, Bo Huang, Han-lin Wang",
journal="Journal of Zhejiang University Science A",
volume="17",
number="3",
pages="240-252",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500065"
}
%0 Journal Article
%T Study on a calibration equation for soil water content in field tests using time domain reflectometry
%A Yun Zhao
%A Dao-sheng Ling
%A Yun-long Wang
%A Bo Huang
%A Han-lin Wang
%J Journal of Zhejiang University SCIENCE A
%V 17
%N 3
%P 240-252
%@ 1673-565X
%D 2016
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500065
TY - JOUR
T1 - Study on a calibration equation for soil water content in field tests using time domain reflectometry
A1 - Yun Zhao
A1 - Dao-sheng Ling
A1 - Yun-long Wang
A1 - Bo Huang
A1 - Han-lin Wang
J0 - Journal of Zhejiang University Science A
VL - 17
IS - 3
SP - 240
EP - 252
%@ 1673-565X
Y1 - 2016
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1500065
Abstract: The crucial point in calibrating soil water content using the technology of time domain reflectometry (TDR) is to establish the relationship between the apparent dielectric constant and the water content. Based on a database, which included 45 kinds of soil samples and 418 data points from our own test data and relevant literature, an empirical calibration equation is proposed. Additionally, the influence of soil type, dry density of soil, compaction energy, pore fluid conductivity, and temperature on the calculated result for water content was also analyzed. Results show that the equation can offer an error of ±0.05 g/g for most soils encountered in geotechnical engineering. However, the estimation error given by the empirical equation becomes significant for soils with dry density less than 1.3 g/cm3, so the equation was modified to consider the influence of dry density. Both of the empirical equations can be used to test gravimetric water content using the TDR method conveniently and efficiently without calibration.
The authors are to be commended for a different and interesting approach to the use of TDR in estimating gravimetric water content. The manuscript is reasonably well written.
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