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J. Jpn. Soc. Soil Phys.
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No. +*2, p. 33+*/ ,**2

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G.C. Topp, J.L. Davis and A.P. Annan  :  

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Reviewing classical studies in soil physics“Electromagnetic Determination of Soil Water Content :Measurements in Coaxial Transmission Lines”
By G.C. Topp, J.L. Davis and A.P. Annan
Water Resources Research, Vol. +0, /1.ῌ/2, (+32*)
Teruhito MIYAMOTO** National Institute for Rural Engineering, Kannondai ,ῌ+ῌ0, Tsukuba -*/ῌ20*3, Japan
Key words : Time Domain Reﬂectometry (TDR), soil moisture, dielectric permittivity, measurement method +

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Fig. +  & ,<- =>

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Figure ,) : G.C. Topp, J.L. Davis and A.P. Annan  

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 01  2 *.*,/ 3  456  +, /&$%78' Topp et al. +32*  Table , 9:$ Topp et al. +32*, Figure .

Fig. - The measured relationship between Ka andqv for the four mineral soils. The solid lineis the empirical best-ﬁt equation and thedashed lines are shifted ῍*.*,/ in qv. The
experimental numbers refer to those usedin Table ,. (Topp et al. +32*, Figure .)y NOH qv;*.+ wr' qv z{*&_ Ka z{
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Fig. . The measured relationship between Ka andqv for the mineral soils, -* mm glass beads,
ground vermiculite, and an organic soil. The
area between the dashed lines is the same
region as between the dashed lines in Figure.. (Topp et al. +32*, Figure 0)

῎ῌ/

qv*.-,.  Bainsville  +*-0  
  !"# $%+ &' Topp et al. +32*, Figure 1

Fig. /

Ka versus temperature from experiment 0
with Bainsville clay loam soil at qv῍*.-,..
The vertical bar at T῍,* is ῌ+ in Ka and represents the measurement precision. (Toppet al. +32*, Figure 1)

 Topp et al., +32* ; Herkelrath et al., +33+ ; Roth etal., +33, N OP) Dasberg and Hopman,+33, QRS) Weitz et al., +331 ; Tomer et al.,+333 ; T ῌUV ,*** ; Regalado et al., ,**- ; Stenger et al., ,**1 $!W$XYPZ [\O]

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Ka 

Fig. 0 The measured relationship between Ka andqv for the Rubicon soil, where the water solution (*.*+ N CaSO.) for experiment , wasreplaced by ,,*** ppm NaCl in experiment.. (Topp et al. +32*, Figure 2)

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Water Resources Research (d- +*0 >

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104 !"#$%&'()

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Miyamoto, T., T. Annaka and J. Chikushi (,**-) : Soilaggregate structure e#ects on dielectric permittivity of an Andisol measured by time domain
reﬂectometry. Vadose Zone J., , : 3*ῌ31.
Miyamoto, T., T. Annaka and J. Chikushi (,**/) : Ex-ῌ ῑ ῐ ῍
Dalton, F.N., W.H. Herkelrath, D.S. Rawlins and J.D.

tended dual composite sphere model for determining dielectric permittivity of Andisols, Soil
Sci. Soc. Am. J., 03 : ,-ῌ,3.

Rhoades (+32.) : Time domain reﬂectometry : Si-

Mualem, Y. (+310) : A new model for predicting themultaneous measurement of soil water content

hydraulic conductivity of unsaturated porous me-

and electrical conductivity with a single probe.
Science (Washington), ,,. : 323ῌ33*.
Dasberg, S. and J.W. Hopman (+33,) : Time domaindia. Water Resour. Res., +, : /+-ῌ/,,.
Or, D. and J.M. Wraith (+333) : Temperature e#ects on
soil bulk dielectric permittivity measured by time

reﬂectometry calibration for uniformly and non-domain reﬂectometry : A physical model. Water

uniformly wetted sandy and clayey soils. Soil

Resour. Res., -/ : -1+ῌ-2-.

Sci. Soc. Am. J., /0 : +-.+ῌ+-./.
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Regalado, C.M., R. Munoz Carpena, A.R. Socorro and
J.M. Hernández Moreno. (,**-) : Time domain re-determination of soil moisture : progress reportﬂectometry models as a tool to understand theI. Can. J. Remote Sensing, - : 10ῌ20.

dielectric response of volcanic soils. Geoderma,

Davis, J.L. and W. J. Chudobiak (+31/) : In-site meterfor measuring relative permittivity of soils. Geol.
Surv. Can., Ottawa, Pep 1/ῌ+A : 1/ῌ13.
Dirksen, C. and S. Dasberg (+33-) : Improved calibra-++1 : -+-ῌ--*.
Roth, C.H., M.A. Malicki and R. Plagge (+33,) : Empirical evaluation of the relationship between soil
dielectric constant and volumetric water content

tion of time domain reﬂectometry soil water con-as the basis for calibrating soil moisture meas-

tent measurements. Soil Sci. Soc. Am. J., /1 : 00*ῌurements. J. Soil Sci., .- : +ῌ+-.

001.
Fellner-Feldegg, H. (+303) : The measurement of die-

Selig, E.T. and S. Mansukhani (+31/) : Relationship ofsoil moisture to the dielectric property. J. Geo-

lectrics in the time domain. J. phys. Chem., 1- :tech. Eng. Div. Amer. Soc. Civil. Eng., GT 2 : 1//ῌ

0+0ῌ0,-.

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