THE EFFECTS OF AMOUNT AND TYPE OF CLAY MINERALS ON SOIL DIELECTRIC CONSTANT FOR MEASURING WATER CONTENT WITH TIME DOMAIN REFLECTOMETRY

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NAMDAR KHOJASTEH D.; SHORAFA M.; FAZELI M.

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Journal: Journal of Water and Soil Conservation Year:2011 | Volume:18 | Issue:3 Page(s): 85-99

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Title

THE EFFECTS OF AMOUNT AND TYPE OF CLAY MINERALS ON SOIL DIELECTRIC CONSTANT FOR MEASURING WATER CONTENT WITH TIME DOMAIN REFLECTOMETRY

Author(s)

NAMDAR KHOJASTEH D. | SHORAFA M. | FAZELI M. | Issue Writer Certificate

Keywords

CLAY CONTENTQ2

CLAY TYPEQ2

SOIL WATER CONTENTQ2

TIME DOMAIN REFLECTOMETRY (TDR)Q2

Abstract

Time domain reflectometry (TDR) is used for determining SOIL WATER CONTENT nowadays. Amount and type of clay minerals in heavy soil can affect soil dielectric constant and cause the error in SOIL WATER CONTENT. The effect of the amount of clay minerals on SOIL WATER CONTENT was the subject of many researchers, but they did not work on the effect of the type of clay minerals. The aim of this research was the effect of type and amount of clay minerals on dielectric constant in heavy soils. For this purpose soil samples with different textures including clay, clay loam, loam, silty clay and sandy clay were taken. The results showed that with increasing the CLAY CONTENT, due to bound water and delay time, the soil dielectric constant decreased and consequently SOIL WATER CONTENT has been shown less than the real amount .The results also showed that Smectite group increased soil dielectric constant. Our results showed that the presented model with four phases including solid, air, bound water and free water in non saline soils presents acceptable results for volumetric water content. But in saline soil this model did not show accurate results. Consequently, soil salinity and CLAY TYPE can affect on soil dielectric constant and water content.

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APA: Copy

NAMDAR KHOJASTEH, D., SHORAFA, M., & FAZELI, M.. (2011). THE EFFECTS OF AMOUNT AND TYPE OF CLAY MINERALS ON SOIL DIELECTRIC CONSTANT FOR MEASURING WATER CONTENT WITH TIME DOMAIN REFLECTOMETRY. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 18(3), 85-99. SID. https://sid.ir/paper/156395/en

Vancouver: Copy

NAMDAR KHOJASTEH D., SHORAFA M., FAZELI M.. THE EFFECTS OF AMOUNT AND TYPE OF CLAY MINERALS ON SOIL DIELECTRIC CONSTANT FOR MEASURING WATER CONTENT WITH TIME DOMAIN REFLECTOMETRY. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2011;18(3):85-99. Available from: https://sid.ir/paper/156395/en

IEEE: Copy

D. NAMDAR KHOJASTEH, M. SHORAFA, and M. FAZELI, “THE EFFECTS OF AMOUNT AND TYPE OF CLAY MINERALS ON SOIL DIELECTRIC CONSTANT FOR MEASURING WATER CONTENT WITH TIME DOMAIN REFLECTOMETRY,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 18, no. 3, pp. 85–99, 2011, [Online]. Available: https://sid.ir/paper/156395/en

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