Air Entrapment and Water Infiltration in Two‐Layered Soil Column
Publication: Journal of Irrigation and Drainage Engineering
Volume 120, Issue 5
Abstract
This study presents the experimental results of one‐dimensional unsaturated water infiltration under two conditions: vertical columns of homogeneous soil and vertical columns of two‐layered soil. The purpose was to more accurately identify the movement of the wetting front under both conditions. The results showed that air pressure buildup was more pronounced in soil columns of two layers than in soil columns of one homogenous layer. Water content in the top layer of a closed two‐layer column was greater than the corresponding height in a homogeneous one‐layer column. Flow conditions and pressure buildup in the bottom layer retarded the wetting front at the interface until pressure reached a maximum value in the bottom layer. An analytical model was developed that predicts the cumulative infiltration into the top layer as well as the travel time of the wetting front.
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References
1.
Adrian, D. D., and Franzini, J. B. (1966). “Impedance to infiltration by pressure buildup ahead of the wetting front.” J. Geophys. Res., 71(24), 5857–5862.
2.
Dixon, R. M., and Linden, D. R. (1972). Soil air pressure and water infiltration under border irrigation. Soil Sci. Soc. Am. Proc., 36, 943–953.
3.
Fok, Y. S. (1970). “One‐dimensional infiltration into layered soil.” J. Irrg. Drain. Div., ASCE, 95(1), 69–81.
4.
Gardner, W. R., and Mayhugh, M. S. (1958). “Solutions and tests of the diffusion equation for the movement of water in soil.” Soil Sci., Soc., Am. Proc., 22, 390–398.
5.
Green, W. H., and Ampt, G. A. (1911). “Studies on soil physics: I, flow of air and water through soils.” J. Agric. Sci., 4, 1–24.
6.
Hill, E. D., and Parlange, J. Y. (1972). “Wetting front instability in layered soil.” Soil Sci., Soc. Am. Proc., 36, 697–702.
7.
Horton, R. E. (1940). “An approach toward a physical interpretation of infiltration capacity.” Soil Sci. Soc. Am. Proc., 5, 399–417.
8.
Kostiakov, A. N. (1932). “On the dynamics of the coefficient of water percolation in soils and on the necessity of studying it from a dynamic point of view for purpose of amelioration.” Trans., Com. Int. Soc. Soil Sci., 6th, Moscow, Russia, Part A, 7–21.
9.
McWhorter, D. B. (1971). “Infiltration affected by flow of air.” Hydrol. Pap. 49. Colorado State Univ., Fort Collins, Colo.
10.
Main, R. G., and Farrell, D. A. (1974). “Determination of wetting front suction in the Green‐Ampt equation.” Soil Sci. Soc. Am. Proc., 38, 872–875.
11.
Morel‐Seytoux, H. J. (1983). “Infiltration affected by air seal crust, ice and various sources of heterogeneity.” Proc., Nat. Conf. on Adv. in Infiltration, Ft. Collins, Colo., 132–146.
12.
Parlange, J. Y., and Hill, D. E. (1979). “Air and water movement in porous media compressibility effect.” Soil Sci., 127, 257–263.
13.
Philip, J. R. (1957). “The theory of infiltration: Profile at infinity.” Soil Sci., 83, 435–443.
14.
Philip, J. R. (1969). Theory of infiltration. Adv. Hydro. Sc., 5, 216–295.
15.
Richards, L. A. (1949). “Method of Measuring Soil Moisture Tension.” Soil Sci., 68, 95–112.
16.
Vachaud, G., Gaudet, J. P., and Kuraz, V. (1974). “Air and water flow during ponded infiltration in a bounded column of soil.” J. Hydrol., 22, 89–108.
17.
Vachaud, G., Vaudin, M., Kharji, D., and Wakil M. (1973). “Effects of air pressure on water flow in an unsaturated stratified vertical column of sand.” Water Resour. Res., 9, 160–173.
18.
Vangennschten, J. T. (1980). “A closed‐form equation for predicting the hydraulic conductivity of unsaturated soil.” Soc. Sci. Am. J., 44(5), 892–893.
19.
Young, E. G., and Peck, A. J. (1964). “Moisture profile development and air compression during water uptake by bounded porous bodies: 1. theoretical introduction.” Soil Sci., 98, 290–294.
Information & Authors
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Published In
Journal of Irrigation and Drainage Engineering
Volume 120 • Issue 5 • September 1994
Pages: 871 - 891
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Aug 25, 1993
Published online: Sep 1, 1994
Published in print: Sep 1994
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