CALCULATION OF SOIL WATER DIFFUSIVITY USING A MODEL FOR SOIL MOISTURE PROFILE UNDER DIFFERENT SALINITY CONDITIONS

محتوى المقالة الرئيسي

Mahdi I. Aoda
Taghreed F. Younan

الملخص

A closed formed model modified from that of van Genuchten (1980) was used to fit
the data of soil moisture profile ( θ vs. λ ) from which the slope dλ/dθ can be evaluated
and then the soil water diffusivity [D(θ)] can be calculated. Diffusivity was calculated for three soil textures under different salinity conditions.
The results showed that the model fitted the data very well with 1% confidence level (R2 > 0.93). D(θ) increased sharply with soil moisture for all soils but its values were lower when the texture got finer. At a certain sodium adsorption ratio (SAR), D(θ)
increase with the increase of salt concentration (C) of the water infiltrating. Increasing SAR of water caused a decrease in D(θ) at any level of C. Same trends were obtained for the values of weighted mean diffusivity D .

تفاصيل المقالة

كيفية الاقتباس
"CALCULATION OF SOIL WATER DIFFUSIVITY USING A MODEL FOR SOIL MOISTURE PROFILE UNDER DIFFERENT SALINITY CONDITIONS" (2010) مجلة الهندسة, 16(01), ص 4569–4579. doi:10.31026/j.eng.2010.01.14.
القسم
Articles

كيفية الاقتباس

"CALCULATION OF SOIL WATER DIFFUSIVITY USING A MODEL FOR SOIL MOISTURE PROFILE UNDER DIFFERENT SALINITY CONDITIONS" (2010) مجلة الهندسة, 16(01), ص 4569–4579. doi:10.31026/j.eng.2010.01.14.

تواريخ المنشور

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