Effect of Aggregate Size and Porosity of Clay Soils on the Hydraulic Parameters of the Green-Ampt Infiltration Model
Publication: Journal of Hydrologic Engineering
Volume 23, Issue 3
Abstract
To study the effect of aggregate size and total porosity of soil on the hydraulic parameters of the Green-Ampt (GA) infiltration model, eight laboratory constant-head infiltration tests were conducted on a clay soil with different values of aggregate size and porosity. Hydraulic conductivity, wetting front suction head, and air entrapment coefficient behind the wetting front of the GA model were measured for the conducted tests. With the use of double-ring infiltrometers, falling-head infiltration tests were also conducted in a field with soil of a clay texture, and a new theoretically based method was proposed for simultaneous estimation of the hydraulic parameters of GA model from falling-head infiltration test data. The results indicated that the estimated hydraulic conductivity of the GA model for laboratory soil columns followed the Kozeny-Carman equation. The air entrapment coefficient is nearly independent from soil aggregate size, but it increases as soil porosity increases. Furthermore, a perfect agreement between the measured infiltration field data and the falling-head approach of the GA model validated the capability of the proposed method to correctly estimate the hydraulic parameters of the GA model.
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References
Bear, J. (1972). Dynamics of fluids in porous media, Elsevier, New York.
Bouwer, H. (1966). “Rapid field measurement of air entry value and hydraulic conductivity of soil as significant parameters in flow system analysis.” Water Resour. Res., 2(4), 729–738.
Bouwer, H. (1969). “Infiltration of water into nonuniform soil.” J. Irrig. Drain. Div., 95(IR4), 451–462.
Carminati, A., Kaestner, A., Hassanein, R., Ippisch, O., Vontobel, P., and Flühler, H. (2007). “Infiltration through series of soil aggregates: Neutron radiography and modeling.” Adv. Water Resour., 30(5), 1168–1178.
Communar, G., and Friedman, S. P. (2015). “Cylindrically confined flows of water from a point source and to a sink, above a water table.” Vadose Zone J., 14(3), 1–9.
Green, W. H., and Ampt, G. A. (1911). “Studies on soil physics. I: The flow of air and water through soils.” J. Agric. Sci., 4(1), 1–24.
Horn, R., and Smucker, A. (2005). “Structure formation and its consequences for gas and water transport in unsaturated arable and forest soils.” Soil Tillage Res., 82(1), 5–14.
Lipiec, J., Wójciga, A., and Horn, R. (2009). “Hydraulic properties of soil aggregates as influenced by compaction.” Soil Tillage Res., 103(1), 170–177.
Lynch, J. M., and Bragg, E. (1985). “Microorganisms and soil aggregate stability.” Advances in soil science, B. A. Stewart, ed., Vol. 2, Springer, New York.
Ma, Y., et al. (2011). “Water infiltration in layered soils with air entrapment: Modified Green-Ampt model and experimental validation.” J. Hydrol. Eng., 628–638.
Ma, Y., Feng, S., Su, D., Gao, G., and Huo, Z. (2010). “Modeling water infiltration in a large layered soil column with a modified Green-Ampt model and HYDRUS-1D.” Comput. Electron. Agric., 71(S1), S40–S47.
Marshall, T. J., and Holmes, J. W. (1979). Soil physics, Cambridge University Press, Cambridge, U.K.
Martin, J. P., Martin, W. P., Page, J. B., Raney, W. A., and De Ment, J. G. (1955). “Soil aggregation.” Adv. Agron., 7, 1–37.
Menon, M., Jia, X., Lair, G. J., Faraj, P. H., and Blaud, A. (2015). “Analysing the impact of compaction of soil aggregates using X-ray microtomography and water flow simulations.” Soil Tillage Res., 150, 147–157.
Mohammadzadeh-Habili, J., and Heidarpour, M. (2011). “Estimating soil hydraulic parameters by using Green and Ampt infiltration equation.” J. Hydrol. Eng., 772–780.
Mohammadzadeh-Habili, J., and Heidarpour, M. (2015). “Application of the Green-Ampt model for infiltration into layered soils.” J. Hydrol., 527, 824–832.
Neuman, S. P. (1976). “Wetting front pressure head in the infiltration model of Green and Ampt.” Water Resour. Res., 12(3), 564–566.
Philip, J. R. (1992). “Falling head ponded infiltration.” Water Resour. Res., 28(8), 2147–2148.
Rawls, W. J., Brakensiek, D. L., and Miller, N. (1983). “Green-Ampt infiltration parameters from soils data.” J. Hydraul. Eng., 62–70.
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Published In
Journal of Hydrologic Engineering
Volume 23 • Issue 3 • March 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Apr 15, 2017
Accepted: Sep 15, 2017
Published online: Jan 6, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 6, 2018
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