Ekberli, İmanverdi Ondokuz Mayıs Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , Gülser, Coşkun Ondokuz Mayıs Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey

Functional changes of soil heat diffusivity and effect on soil temperature

33967

Heat diffusivity is an important parameter for monitoring soil temperature. In this study, soil temperatures througout to soil depth were determined with respect to the heat diffusivity coefficient values measured and obtained with functionel relations, and compared eachother. Mean heat diffusivity values for 5^-10; 10-20; 20-50; 50-100 cm soil layers were estimated as 3.65·10^-6; 7.27·10^-6; 12.82·10^ -6; 16.68·10^-6 m^2sn^-1 according to mean daily soil temperature values of Bafra Meteorology Station in Samsun between May-July 2012, respectively. Relationships between heat diffusivity and soil depth were explained with linear, exponential, power and parabolic functions. Mean relative errors between heat diffusivity values estimated from experimental (meteorological) data and functions varied between 7.79% and 18.64%; and it was found that the relative error estimated using parabolic function was the lowest. Mean relative errors between experimental temperature values and temperature values estimated using heat diffusivity values of functions varied between 2.50% and 2.83%. The lowest relative error was found in soil temperatures estimated using the heat diffusivity values of parabolic function.

294

Functional relationships , Heat diffusivity , Meteorology , Soil temperature

Anadolu Journal Of Agricultural Sciences

300