A Multi-Functional Penta-Needle Thermo-Dielectric Sensor for Porous Media Sensing

Sheng, Weifan; Rumana, Kashifa; Sakai, Masaru; Silfa, Franyell; Jones, Scott B.

doi:10.1109/jsen.2016.2527020

Cited by 9 publications

(2 citation statements)

References 31 publications

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“…A possible alternative is to use a thermo‐FDR (Sheng et al, ), because capacitance or impedance sensors (FDR) allow more flexibility in electrode configuration with reduced measurement complexity compared to TDR, in addition to lower costs of the electronics system and minimal postprocessing (Sheng et al, ; Xu et al, ; Zent et al, , ). Sheng et al () coupled an electromagnetic sensor to determine water content with a penta‐needle thermo‐FDR, which demonstrated a significant improvement in soil water content determination (with RMSE = 0.012 cm 3 /cm 3 compared to RMSE = 0.042 cm 3 /cm 3 of the HP methods). It should be noted the proper frequency range must be used to obtain accurate soil water determination as well as to reduce effects of temperature and salinity, but the use of FDR has difficulty in soils with high clay content.…”

Section: Limitations and Perspectives Of The Hp Methodsmentioning

confidence: 99%

Development and Application of the Heat Pulse Method for Soil Physical Measurements

Dyck

Horton

et al. 2018

Reviews of Geophysics

125

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Accurate and continuous measurements of soil thermal and hydraulic propertiesare required for environmental, Earth and planetary science, and engineering applications, but they are not practicallyobtained by steady-state methods. The heat pulse (HP) method is a transient method for determinationof soil thermal properties and a wide range of other physical properties in laboratory and field conditions. The HP method is based on the line-heat source solution of the radial heat flow equation. This literature review begins with a discussion of the evolution of the HP method and related applications, followed by the principal theories, data interpretation methods and their differences. Important factors for HP probe construction are presented. The properties determined in unfrozen and frozen soilsare discussed, followed by a discussion of limitations and perspectives for the application of this method. The paper closes with a brief overview of future needs and opportunities for further development and application of the HP method.Keywords thermal properties, thermal conductivity, thermal resistivity, heat capacity, thermal diffusivity, thermal inertia, dual probe heat pulse, thermal probe, hot-wire method, fiber optics, distributed temperature sensing (DTS), thermo-time/frequency domain reflectometry (thermo-TDR, thermo-FDR), soilwater content, ice content, frozen soils, instrumentation DisciplinesAgricultural Science | Agriculture | Hydrology | Soil Science Comments This is a manuscript of an article published as He, Hailong, Miles F. Dyck, Robert Horton, Tusheng Ren, Keith L. Bristow, Jialong Lv, and Bingcheng Si. "Development and application of the heat pulse method for soil physical measurements." Reviews of Geophysics (2018) This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1029/2017RG000584 © 2018 American Geophysical Union. All rights reserved.Development and application of the heat pulse method for soil physical properties in laboratory and field conditions. The HP method is based on the line-heat source solution of the radial heat flow equation. This literature review begins with a discussion of the evolution of the HP method and related applications, followed by the principal theories, data interpretation methods and their differences. Important factors for HP probe construction are presented. The properties determined in unfrozen and frozen soilsare discussed, followed by a discussion of limitations and perspectives for the application of this method. The paper closes with a brief overview of future needs and opportunities for further development and application of the HP method.

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Section: Limitations and Perspectives Of The Hp Methodsmentioning

confidence: 99%

Development and Application of the Heat Pulse Method for Soil Physical Measurements

Dyck

Horton

et al. 2018

Reviews of Geophysics

125

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“…Subsequent evaluations in the field (Heitman, Xiao, Horton, & Sauer, 2008b;Wang, Fan, & Wang, 2015;Xiao, Heitman, Sauer, Ren, & Horton, 2014;Xiao, Horton, Sauer, Heitman, & Ren, 2011), laboratory (Deol, Heitman, Amoozegar, Ren, & Horton, 2012), and by numerical modeling (Sakai, Jones, & Tuller, 2011) have shown that the SHB approach can provide in situ subsurface evaporation estimates at relatively short time steps (e.g., sub-daily) and that the estimates compare favorably with independent estimates obtained through lysimetry and micrometeorological techniques. Recent advances in heat-pulse sensor design (Sheng, Rumana, Sakai, Silfa, & Jones, 2016;Zhang, Lu, Heitman, Horton, & Ren, 2012) and improvements in SHB calculations (Deol, Heitman, Amoozegar, Ren, & Horton, 2014;Xiao et al, 2014) have extended the measurement zone to capture subsurface soil water evaporation from its inception (i.e., once evaporation occurs within the soil rather than at the surface). In the following, we describe the principle of measurement, discuss the accuracy and limitations for implementation, and provide an example dataset for calculations.…”

Section: Rationale For General Proceduresmentioning

confidence: 99%

Advances in heat‐pulse methods: Measuring soil water evaporation with sensible heat balance

Heitman

Zhang

Xiao

et al. 2020

Soil Science Soc of Amer J

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Soil water evaporation is an important process in hydrology, engineering, and agriculture. Few techniques are capable of measuring soil water evaporation in situ. An approach has been developed to measure in situ subsurface soil water evaporation using a soil sensible heat balance (SHB) with measurement data obtained from multi‐needle heat‐pulse sensors. Terms in the SHB (i.e., sensible heat flux and change in sensible heat storage) are calculated from heat‐pulse sensor derived soil temperature and thermal property (i.e., thermal conductivity and heat capacity) measurements for a thin soil layer with thickness corresponding to the sensor geometry. The quantity of latent heat required for soil water vaporization can be determined as the residual to the SHB (i.e., change in heat flux with depth minus change in sensible heat storage with time) for the soil layer. Dividing latent heat (per unit time) by heat of vaporization for water allows data to be converted to evaporation rate. Numerical analysis indicates that the SHB approach is most sensitive to the heat flux component of the SHB. Laboratory and field tests indicate that SHB results compare favorably with mass‐balance and micrometeorologic approaches for evaporation measurement, with SHB typically differing by <0.2 mm d−1 from the reference methods.

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Soil Physical Properties and Processes

Sadeghi

Babaeian

Arthur

et al. 2018

Handbook of Environmental Engineering

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A Multi-Functional Penta-Needle Thermo-Dielectric Sensor for Porous Media Sensing

Cited by 9 publications

References 31 publications

Development and Application of the Heat Pulse Method for Soil Physical Measurements

Development and Application of the Heat Pulse Method for Soil Physical Measurements

Advances in heat‐pulse methods: Measuring soil water evaporation with sensible heat balance

Soil Physical Properties and Processes

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