Soil Temperature Estimation by a Numerical Method1
- R. J. Hanks,
- D. D. Austin and
- W. T. Ondrechen2
A numerical method for computing soil temperature as a function of time and depth was devised. The method allows for variable soil properties as a function of depth and requires measurement of soil temperature at or near the soil surface. Computed and measured soil temperatures agreed within 1.0C when actual soil thermal properties were used for the computation. Computed and measured soil temperatures agreed within 1.5C when soil thermal diffusivity was assumed constant at 0.20 cm2 min-1. Actual values varied with depth from 0.21 to 0.29. Where the thermal diffusivity was assumed uniform at 0.45 cm2 min-1, temperature errors grew from 1.0–1.7C after 3 days to 1.7–3.1C after 6 days.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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