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Transcript of j No. +*0,p.+++3 ,**1 · *.2+. +.*. +.*0J g K ˘ˇ ˆ˙˝˛˚˜ !" #$ %&’() ˝˛ *+&,ˆ-%. / ..*0...
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Soil Temperature Change and Heat of Wetting during
Infiltration into Dry soils
Takeo AKAE*, Aya TANAKA** and Munehide ISHIGURO*
* The Graduate School of Environmental Science, Okayama University,
-�+�+ Tsushima-Naka, Okayama, Japan
** Okayama Prefecture Association of Land Improvement Project Promotion,
+�-�1 Uchisange, Okayama, Japan
Abstract
In infiltratioin process of water to dry soils, rise of the temperature just before the wetting front
arrival is observed. This phenomenon is caused by wetting heat released by adsorption of water
vapor onto the soil and or wetting of the soil. The temperature change a#ects not only soil water
potential, infiltration itself due to change in viscosity of the water but also bio-chemical phenomena
by changing temperature environment. However, few quantitative experiments and analytic
studies have been made on this phenomena of natural soils, many problems remain to be solved
on this matter. In this research, to evaluate the soil temperature change quantitatively, infiltra-
tion experiment was conducted on three types of natural soils under thermally insulated condi-
tion and the temperature change was monitored. In addition, wetting heat of the soils was meas-
ured by calorimetric method. The experimental results showed that the temperature increased
at just before the wetting front by ,.- , ,+.0 and /.2 for the Masa soil, Ando soil and the red
yellow soil, respectively. We observed strong relationship between the increases in the temper-
ature and the wetting heats of each soil. The wetting heats of each soil showed strong relation-
ship with the cation exchange capacity.
Key words : Infiltration, Heat of wetting, Specific surface, Adiabatic infiltration experiment, Cat-
ion exchange capacity
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Anderson, D.M. and Linville, A. (+30,) : Temperature
fluctuations at a wetting front : I. Characteristic
temperature-time curves, Soil Sci. Soc. Am. J., ,0 :
+.�+2.
Anderson, D.M. and Linville, A. (+30-) : Temperature
fluctuations at a wetting front : II. The e#ect of
initial water content of the medium on the mag-
nitude of the temperature fluctuations, Soil Sci.
Soc. Am. J., ,1 : -01�-03.
Berge, H.F.M. ten : qr#s^��t u+330v : �#
��wExy !"�,�^�� z� {�|}� p. -+.
Iwata, S. (+31,) : Thermodynamics of soil water. II,
Soil Sci., ++- : -+-�-+0.
Iwata, S., Tabuchi, T. and Warkentin, B.P (+322) : Soil-
water interaction Machanism and application,
Mercel Dekker Inc., New York : p. +*,.
Keren, R. and I. Shainberg (+31/) : Water vapor iso-
therms and heat of immersion of Na- and Ca-
Montmorilonite sysytems, I. Homoionic clay, Clays
and Clay Minerals, ,- : +3-�,**.
Keren, R. and I. Shainberg (+313) : Water vapor iso-
therms and heat of immersion of Na- and Ca-
Montmorilonite sysytems, II. Mixed systems, Clays
and Clay Minerals, ,1 : +./�+/+.
Keren, R. and I. Shainberg (+32*) : Water vapor iso-
therms and heat of immersion of Na- and Ca-
Montmorilonite sysytems, III. Thermodynamics,
Clays and Clay Minerals, ,2 : ,*.�,+*.
Kijne, J.W. (+303) : On the interaction of water mole-
cules and Montmorilonite surfaces, Soil Sci. Soc.,
Amer. Proc., -- : /-3�/.-.
~� � u+311v : ������(��������,7' �5B�������(�� R����� uS.Sv �5B u�v�� \���� 02� /*�/1.
Perrier, E.R. and Prakash, O.M. (+311) : Heat and va-
por movement during infiltration into dry soils,
Soil Sci., +,. (,) : 1-�10.
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