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Calibration of time domain reflectometry for water content measurement using a composite dielectric approach


, : Calibration of time domain reflectometry for water content measurement using a composite dielectric approach. Water resources research 26(10): 2267-2273


Accession: 002042095

DOI: 10.1029/wr026i010p02267

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Related references

Mojid, M.A.; Cho, H., 2004: Evaluation of the time-domain reflectometry (TDR)-measured composite dielectric constant of root-mixed soils for estimating soil-water content and root density. The effects of dense plant roots on the time-domain reflectometry (TDR)-measured composite dielectric constant, epsilon(c), and soil-water content, theta(TDR), were investigated by laboratory experiments with root-mixed sand and loam soil. TDR ove...

Chudinova, S.M.; Ponizovskii, A.A., 1998: The effect of soil texture on the time domain reflectometry calibration for soil water content measurement. Time Domain Reflectometry (TDR) measurements revealed the abrupt change in the slope of the relationships between dielectric constant (DC) and water content (theta) for soils and sand-kaolin mixtures of heavy texture. The calibration curve DC(thet...

Nakashima Makoto; Inoue Mitsuhiro; Sawada Kazuo; Nicholl Chris, 1998: Measurement of soil water content by amplitude domain reflectometry method and its calibration. Recently, it is noticed that the measurement method of soil water content from the dielectric constant of soil, and TDR (time domain reflectometry) method and FDR (frequency domain reflectometry) method are frequently utilized. However, these meth...

Kellner Erik; Lundin Lars Christer, 2001: Calibration of time domain reflectometry for water content in peat soil. Since peat soil differs from mineral soil in several respects, mineral-soil calibration functions for time domain reflectometry (TDR) are not necessarily applicable. This paper evaluates a number of calibration functions, both empirical polynomial...

Seyfried, M.S.; Murdock, M.D., 1996: Calibration of time domain reflectometry for measurement of liquid water in frozen soils. The amount of liquid water (theta-L) present in soils at sub-freezing temperatures affects soil infiltrability, soil solution migration, and soil-atmosphere energy exchange. For these reasons, a number of frozen soil simulation models calculate th...

Naito, S.; Hoshi, M.; Mashimo, S., 1997: In vivo dielectric analysis of free water content of biomaterials by time domain reflectometry. A method of in vivo analysis of the free water content in living organisms by dielectric analysis in the time domain is described. Human skin is chosen as an example of living tissue. The cells suitable for the measurement of various layers of hum...

Dirksen, C.; Dasberg, S., 1993: Improved calibration of time domain reflectometry soil water content measurements. Time domain reflectometry (TDR) is becoming a widely used method to determine volumetric soil water content, theta, from measured effective relative dielectric constant (permittivity), epsilon, using the empirical theta(epsilon) Topp-Davis-Annan c...

Kipp, J.A.; Kaarsemake, R.C., 1995: Calibration of time domain reflectometry water content measurements in growing media. The applicability of Time Domain Reflectometry (TDR) for different growing media was tested. A new calibration method was introduced in which different pressure heads were applied and water contents were determined indirectly. Calibration was carr...

Ferre, P.A.; Rudolph, D.L.; Kachanoski, R.G., 1996: Spatial averaging of water content by time domain reflectometry: implications for twin rod probes with and without dielectric coatings. The averaging of apparent relative dielectric permittivities by time domain reflectometry (TDR) is examined for properties varying along TDR waveguides and in the plane perpendicular to a TDR probe. A square root averaging model with uniform weigh...

Anonymous, 2009: Complex Permittivity Model for Time Domain Reflectometry Soil Water Content Sensing II Calibration