吸水過程の土壌水分拡散係数の算定法について

概要

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A novel method for estimating soil watcr diffusivity D of absorption process has been derived, based on the equation: η=2∫1cD(α)/I(α)dα,where η=x/√ι(Boltzmann variable), I(C)=∫ηdC and C is a normalized water content. By the use of the numerical integral formulas, the above equation is transformed into the simultaneous equations which contain gγ(≡ D(Cγ)/I(Cγ)) as unknowns. D(C) values arc obtained from the solutions gγ multiplied by I(C). The method was examined practically by the distribution of soil water content in the horizontal column. It was found that numerical differentiation of soil water content was not necessary for estimating D(C), while in 'Bruce method' it was indispensable, and that the water content distribution almost equal to original data was obtained when inverse calculation was made using D(C) secured by thc author's method.
三重大学農学部の論文