The Development of a One-Parameter Model for the Soil-Water Characteristic Curve in Loess Gully Regions

Abstract:

It is important to understand soil hydraulic properties in order to predict the movement of water and solutes such as pollutants. To this end, 55 soil samples were collected from different areas of the Nanxiaohegou basin and used to generate soil-water characteristic curves. These were then fitted using the power-, exponential-, and logarithmic versions of the Gardner model; the logarithmic model yielded the best fit overall. The logarithmic model was further simplified to yield a one-parameter model for estimating the soil-water characteristic curve within the basin, and it was demonstrated that the value of the single parameter is dependent on the topography and usage of the land.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 488-493
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.488
• Online since: December 2012
• Authors: Xiao Yu Song, Huai You Li, Wen Juan Shi
• Keywords: Characteristic Parameter, Gardner Model, Land Use Pattern, Topography

References

[1] Campbell G S. 1974. A simple method for determining unsaturated conductivity from moisture retention data. Soil Sci, 117(6): 311-314.

DOI: 10.1097/00010694-197406000-00001

[2] Lei Z D, Yang S X, Xie S C. 1988. Soil water dynamics. (in Chinese). Beijing： Tsinghua University press. 25-124.

[3] Lei Z D, Hu H P, Yang S X. 1999 A review of soil water research. Advances in Water Science. (in Chinese). 3 (10): 311-318.

[4] Song X.Y., Li Y.J., Jiang J., Ma Y.X. 2008. Progress and perspective of spatial variability study on unsaturated soil water movement parameters. Advances in Earth Science. (in Chinese) 23(6): 613-618.

[5] Liao K.H., Xu S.H., Wu J.C., JI S.H. and Lin Q. 2011. Assessing soil water retention characteristics and their spatial variability using pedotransfer functions. Pedosphere 21(4): 413-422.

DOI: 10.1016/s1002-0160(11)60143-4

[6] Mualem Y. 1976. A new model for predicting the hydraulic conductivity of unsaturated porous media. Water Resources Research. 12(3): 513-522.

DOI: 10.1029/wr012i003p00513

[7] Tyler SW, Wheatcraft S.W. 1989. Application of fractal mathematics to soil water retention estimation. Soil Science Society of America Journal. 53: 987-996.

DOI: 10.2136/sssaj1989.03615995005300040001x

[8] Tyler S W，Wheatcraft S.W. 1990. Fractal process in soil water retention. Water Resources Research. 26: 1047-1056.

DOI: 10.1029/wr026i005p01047

[9] Kravchenko A, Zhang R. 1998. Estimating the soil water retention from particle-size distribution: a fractal approach. Soil Science. 163(3): 171-179.

DOI: 10.1097/00010694-199803000-00001

[10] Arya L M, Lei F J, Van Genuchten M T. 1999. Scaling parameter to predict the soil water characteristic from particle-size distribution data. Soil Soc Am J. 63: 510-519.

DOI: 10.2136/sssaj1999.03615995006300030013x

[11] Song Y., Hao L. T. 2012. Study of soil-water characteristic curve using microscopic spherical particle model. Pedosphere. 22(1): 103-111.

DOI: 10.1016/s1002-0160(11)60196-3

[12] Huang G.H., Zhang R.D. and Huang Q.Z. 2006. Modeling soil water retention curve with a fractal method. Pedosphere. 16(2): 137-146.

DOI: 10.1016/s1002-0160(06)60036-2

[13] Wosten J H M, Van Genuchten M T. 1988. Using texture and other properties to predict the unsaturated soil hydraulic functions. Soil Soc Am J. 52: 1762-1770.

DOI: 10.2136/sssaj1988.03615995005200060045x

[14] Filogueira R R. 1999. Comparison of fractal dimensions estimated from aggregate mass-size distribution and water retention scaling. Soil Science. 164(4): 217-223.

DOI: 10.1097/00010694-199904000-00001

[15] Gomendy V. 1999. Silty topsoil structure and its dynamics: the fractal approach. Geoderma. 88: 165-189.

DOI: 10.1016/s0016-7061(98)00103-7

[16] Jia H W. 2004. Experimental study on parameter distributions of soil water movement in Shiyang River basin. MA.D. Dissertation (In Chinese). Yangling: Northwest Sci-Tech University of Agriculture and Forestry.

[17] Jia H W, Kang S Z, Zhang F C. 2006. One-parameter model of soil hydraulics parameters. Journal of Hydraulic Engineering. (In Chinese). 37(3): 272-277.

[18] Lei F J, Russell W B, Lesch S M. 1997. Closed-form expressions for water retention and conductivity data. Ground Water. 35 (5): 848-858.

DOI: 10.1111/j.1745-6584.1997.tb00153.x

[19] Weindorf D. C. and Zhu Y. 2010. Spatial variability ofsoil properties at capulin volcano, New Mexico, USA: Implications for sampling strategy. Pedosphere 20(2): 185-197.

DOI: 10.1016/s1002-0160(10)60006-9

[20] Han X.W., Shao M.A. and HORTON R. 2010. Estimating van Genuchten model parameters of undisturbed soils using an integral method. Pedosphere 20(1): 55-62.

DOI: 10.1016/s1002-0160(09)60282-4