COMPARISON OF METHODS TO ESTIMATE THE OXYGEN DIFFUSION RATIO AND AIR PERMEABILITY BY USING THE EFFECTIVE SATURATED AND SOIL MOISTURE

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MOHAMADI P.; NEYSHABOORI M.R.; AHMADI A.

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Journal: Journal of Water and Soil Year:2013 | Volume:27 | Issue:5 Page(s): 1023-1033

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Title

COMPARISON OF METHODS TO ESTIMATE THE OXYGEN DIFFUSION RATIO AND AIR PERMEABILITY BY USING THE EFFECTIVE SATURATED AND SOIL MOISTURE

Author(s)

MOHAMADI P. | NEYSHABOORI M.R. | AHMADI A. | Issue Writer Certificate

Keywords

OXYGEN METERQ2

GAS DIFFUSIONQ2

AIR PERMEABILITYQ2

SOIL MOISTUREQ2

EFFECTIVE SATURATIONQ2

Abstract

Gas diffusion ratio in the soil in compare to diffusion in the atmosphere (DP/DO) and AIR PERMEABILITY in the soil (Ka) is a function of soil physical characteristic, including pore size, continuity and air porosity. Also GAS DIFFUSION in soil is different based on the shape, moisture content (q), size and pore tortuosity. Therefore direct measurement is difficult and time consuming. In this study, 30 number of soil samples from different texture classes were prepared as undisturbed soil using a steel cylinder. At different eeffective saturation (Se) and q content, DP/DO values were measured with oxygen diffusion unsteady method and Ka was measured with falling head method. The regression equation of their variation with the moisture and Se was obtained. The results showed that with increase in soil q and Se, DPIDO and Ka decreased as a logarithmic function. Maximum and minimum value are obtained, at low and high humidity (near saturation), respectively. Analysis of the results according to R2, RMSE and GMER showed that use Se caused a significant increase in the accuracy of estimated. Also based on the results, the amount of soil Se qand q can be used to estimate DP/DO and Ka, without direct measurement of them.

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APA: Copy

MOHAMADI, P., NEYSHABOORI, M.R., & AHMADI, A.. (2013). COMPARISON OF METHODS TO ESTIMATE THE OXYGEN DIFFUSION RATIO AND AIR PERMEABILITY BY USING THE EFFECTIVE SATURATED AND SOIL MOISTURE. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 27(5), 1023-1033. SID. https://sid.ir/paper/141217/en

Vancouver: Copy

MOHAMADI P., NEYSHABOORI M.R., AHMADI A.. COMPARISON OF METHODS TO ESTIMATE THE OXYGEN DIFFUSION RATIO AND AIR PERMEABILITY BY USING THE EFFECTIVE SATURATED AND SOIL MOISTURE. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2013;27(5):1023-1033. Available from: https://sid.ir/paper/141217/en

IEEE: Copy

P. MOHAMADI, M.R. NEYSHABOORI, and A. AHMADI, “COMPARISON OF METHODS TO ESTIMATE THE OXYGEN DIFFUSION RATIO AND AIR PERMEABILITY BY USING THE EFFECTIVE SATURATED AND SOIL MOISTURE,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 27, no. 5, pp. 1023–1033, 2013, [Online]. Available: https://sid.ir/paper/141217/en

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