Analysis of thermal diffusivity data determined for selected organic topsoil layer

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Analysis of thermal diffusivity data determined for selected organic topsoil layer

Journal Title: Annals of Warsaw University of Life Sciences – SGGW. Land Reclamation - Year 2009, Vol 41, Issue 2

Abstract

Thermal diffusivity (KT) is a very complex soil property. However, proper estimation of this parameter is very important for the study of thermal processes in the soil. Nevertheless, the thermal diffusivity of peat and organic soils is not well characterized. The purpose of this study was to evaluate different methods for the assessment of the thermal diffusivity of selected organic topsoil layer. The first group of methods included calculation procedures developed from analytical solution of the heat transfer equation. For the determination of thermal diffusivity the distribution of the soil temperature at two depths was required. The second group of methods was based on the classical defi nition of thermal diffusivity where the quantification of thermal conductivity and heat capacity is required. The measurements and calculations clearly suggest that methods based on the phase equation should be not considered as appropriate methods for thermal diffusivity determination for organic soils. The other methods considered lead to results which were comparable to the experimental KT data.

Authors and Affiliations

Tomasz Gnatowski

Keywords

thermal diffusivity top soil layer

EP ID EP160214
DOI -
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