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Title

Evaluation of an analytical method for relationship between soil hydraulic diffusivity and sorptivity under zeolite application

Year: 1400
COI: JR_IAR-39-2_001
Language: EnglishView: 111
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Authors

Alireza sepaskhah - Department of Water Engineering, College of Agriculture, Shiraz University, Shiraz, I. R. Iran
J. J. Rahmani-Soghayeh - Department of Water Engineering, College of Agriculture, Shiraz University, Shiraz, I. R. Iran
A. Garmsiri - Department of Water Engineering, College of Agriculture, Shiraz University, Shiraz, I. R. Iran

Abstract:

ABSTRACT-Zeolite is used to improve the soil hydraulic properties, i.e., soil hydraulic diffusivity (D) and sorptivity (S) that should be determined. A simple method that relates S to D was evaluated by horizontal water absorption experiment in sandy loam, loam and silty clay soils and zeolite application rates of ۰, ۴, ۸, and ۱۲ g kg-۱ soil. Results indicated that zeolite application was not effective on the a and b values of hydraulic diffusivity function (D=aEXP(bθ), θ is the soil water content, cm۳ cm-۳), while maximum value of a and b in sandy loam and silty clay soils, respectively occurred by zeolite application of ۸ g kg -۱ soil. The values of a and b for loam soil were not influenced by zeolite application rates. Sorptivity for sandy loam soil was reduced by zeolite application rate, while minimum value of S for loam and silty clay soils occurred at zeolite application rate of ۸ g kg-۱ soil. It is indicated that indirect determination of S for different soil textures and zeolite application rates were closely similar to the direct determination of S. Therefore, by determination of S value by simple horizontal absorption test at two different initial soil water contents or two different absorption suction heads in tension infiltrometer  the values of Ds and α for hydraulic diffusivity function (D=Dsθα) can be estimated.

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sepaskhah, Alireza and J. Rahmani-Soghayeh, J. and Garmsiri, A.,1400,Evaluation of an analytical method for relationship between soil hydraulic diffusivity and sorptivity under zeolite application,https://civilica.com/doc/1186301

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Paper count: 21,016
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