Relationship between air permeability, water conductivity and water content for undisturbed and disturbed soils

Wang Weihua; Wang Quanjiu; Fan Jun

Volume 24 Issue 8

Aug. 2008

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Abstract

Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2008 > 24(8): 25-29.

Wang Weihua, Wang Quanjiu, Fan Jun. Relationship between air permeability, water conductivity and water content for undisturbed and disturbed soils[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2008, 24(8): 25-29.

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Relationship between air permeability, water conductivity and water content for undisturbed and disturbed soils

1.
institute of Water Resources and Hydraulic Power Xi’an University of Technology, Xi’an 710048, China
2.
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, the Chinese Academy of Sciences, Yangling 712100, China

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Received Date: July 14, 2007
Revised Date: February 01, 2008
Published Date: August 30, 2008

Graphical Abstract

Abstract

Abstract

In order to analyze the relationship between soil air permeability characteristics and soil water conductivity characteristics, the variational characteristics of soil air permeability and water conductivity with the change of soil water content were studied, the air permeability characteristics and water conductivity characteristics for both undisturbed and disturbed soils were compared and the relationship between relative air permeability, water conductivity and water saturation were analyzed of wheat lands soil samples in Yangling of Shannxi province. The results show that soil water conductivity decrease with water content increasing and Water conductivity and air permeability for undisturbed soils is higher than that for disturbed soils, which confirms that soil structure and pores characteristics have enormous impact on the transport of water and air. In addition, although the variational tendency of these characteristics between undisturbed and disturbed soils is almost same, but curves of their variational tendency are not completely alignment. It can be concluded that the pore connectivity and bending degree are different between undisturbed and disturbed soils.
- soil air permeability,
- soil water conductivity,
- water saturation

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