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The thermal properties including volumetric heat capacity, thermal conductivity, thermal diffusivity, and diurnal and annual damping depths of 10 representative soil series of Korea were calculated using some measurable soil parameters based on the Taxonomical Classification of Korean Soils. The heat capacity of soils demonstrated a linear function of water content and ranged from 0.2 to 0.8 cal cm<SUP>-3</SUP> ℃<SUB>-1</SUB> for dry and saturated medium-textured soil, respectively. A small increase in water content of the dry soils caused a sharp increase in thermal conductivity. Upon further increases in water content, the conductivity increased ever more gradually and reached to a maximum value at saturation. The transition from low to high thermal conductivity occurred at low water content in the soils with coarse texture, and at high water content in the other textures. Thermal conductivity ranged between 0.37×10<SUP>-3</SUP> cal cm<SUP>-1</SUP> s<SUB>-1</SUB> ℃<SUB>-1</SUB> for dry (medium-textured) soil and 4.01×10<SUP>-3</SUP> cal cm<SUP>-1</SUP> s<SUB>-1</SUB> ℃<SUB>-1</SUB> for saturated (medium/coarse-textured) soil. The thermal diffusivity initially increased rapidly with small increases in water content of the soils, and then decreased upon further increases in the soil-water content. Even in an extreme soil with the highest diffusivity value (1.1×10<SUP>-2</SUP> cm<SUP>2</SUP> s<SUP>-1</SUP>), the daily temperature variation did not penetrate below 70 cm soil depth and the yearly variation not below 13.4 m as four times of damping depths.
목차
Abstract
Introduction
Materials and Methods
Results and Discussion
Conclusions
References
참고문헌 (37)
참고문헌 신청
Abu-Hamdeh, N. H. / 2000 / Soil thermal conductivity: Effects of density, moisture, salt concentration, and organic matter / Soil Sci. Soc. Am. J 64(4):1285~1290
Akinyemi, O. D. / 2004 / Spatio-temporal variability and fractal characterization of the thermal conductivity measured in situ in a natural clay soil / Journal of Geophysics and Engineering 1(4):252~258
Aydin, M. / 1993 / Estimation of thermal properties of widely distributed red soils in the Harran Plain / 2nd International Meeting on Red Mediterranean Soils :149~151
Aydin, M. / 1993 / Test of a combined soil moisture/soil heat simulation model on a bare field soil in Southern Turkey / Z. Pflanzenern. Bodenk 156:441~446
Balland V. / 2005 / Modeling soil thermal conductivities over a wide range of conditions / J. Environ. Eng. Sci 4:549~558
Akinyemi, O. D. / 2004 / Spatio-temporal variability and fractal characterization of the thermal conductivity measured in situ in a natural clay soil / Journal of Geophysics and Engineering 1(4):252~258
Aydin, M. / 1993 / Estimation of thermal properties of widely distributed red soils in the Harran Plain / 2nd International Meeting on Red Mediterranean Soils :149~151
Aydin, M. / 1993 / Test of a combined soil moisture/soil heat simulation model on a bare field soil in Southern Turkey / Z. Pflanzenern. Bodenk 156:441~446
Balland V. / 2005 / Modeling soil thermal conductivities over a wide range of conditions / J. Environ. Eng. Sci 4:549~558
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UCI(KEPA) : I410-ECN-0101-2014-521-000792946