Influence of Soil Texture on Soil-Water Characteristic Curves of Different Sandy Loam Layers

Abstract:

Characteristic curves of soil moisture, between water content and matrix suction, are the basis for solving the problems of water flow and solute movement in soils. The soil–water characteristics of five layers of depths, 0–12 cm, 12–24 cm, 24–36 cm, 36–48 cm, and 48–60 cm, were measured for a sandy loam soil from Daxing District of Beijing in the northern part of the North China Plain by a pressure membrane apparatus. Curves were fitted using the Van Genuchten model. The fit between measured data and modeled results was excellent. The soil-water characteristic curves showed the typical Sshape of the Van Genuchten model. Matrix suction decreased with an increase in soil moisture; at low suctions, soil moisture content changed to a greater extent with suction, but at high suction, changes in soil moisture content with changes in suction were small. Clay content was proportional to soil water storage capacity and was inversely related to the speed of dehydration.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 3607-3610
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.3607
• Online since: June 2014
• Authors: Li Zhu Hou*, Jochen Wenninger, Xu Jie Li
• Keywords: Matrix Suction, Sandy Loam, Soil Water Characteristic Curve, Van Genuchten Model, Water Content

References

[1] van Genuchten M. Th: Soil Sci. Soc. Am. J. Vol. 44(1980), p.892.

[2] Fredlund, D. G. and A. Q. Xing: Can. Geotech. J. Vol. 31(1994a), p.521.

[3] Ghanbarian Alavijeh, B., A. Liaghat, G. H. Huang, and M. Th. van Genuchten: Pedosphere Vol. 20 (2010), p.456.

DOI: 10.1016/s1002-0160(10)60035-5

[4] Zhou J. and J. L. Yu: J. Zhejiang University-science Vol. 6A (2005), p.797.

[5] Fredlund, D. G., A. Q. Xing, and S, Huang: Can. Geotech. J. Vol. 31(1994b), p.533.

[6] Gitirana, G. N. and D. G. Fredlund: J. Geotech. Geoenviron. Vol. 130 (2004), p.209.

[7] Hwang S. I. and S. I. Choi: J. Hydrol. Vol. 323(2006), p.325.