Ponding Analysis with Green-and-Ampt Infiltration
Publication: Journal of Hydrologic Engineering
Volume 12, Issue 1
Abstract
The ponding of water over level terrain caused by storms of arbitrary temporal intensity is quantified by solving water-balance differential equations involving cumulative rainfall, infiltration, the depth of ponded water, and evaporation of ponded water. Infiltration is quantified using an extended Green-and-Ampt formulation in which the depth of ponded water influences the infiltration rate. A numerical algorithm for calculating the infiltration and ponding hydrographs is developed and applied in this work. The maximum depth of ponded water and the duration of ponding are among the variables that can be calculated with the method presented in this paper. These variables are useful in basin irrigation and in wetland wetting and restoration.
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Acknowledgments
This research was funded in part by National Science Foundation Grant No. NSF0114437.
References
Green, W. H., and Ampt, G. A. (1911). “Studies on soil physics. 1. The flow of air and water through soils.” J. Agric. Sci., 4(1), 1–24.
Loáiciga, H. A., and Huang, A. (2005). “Flooding-cycle analysis in wetlands with negligible overland drainage.” Dynamics and biogeochemistry of river corridors and wetlands, International Association of Hydrological Sciences (IAHS), Publ. No. 294, Wallingford, U.K., 122–129.
Philip, J. R. (1993). “Variable-head ponded infiltration under constant or variable rainfall.” Water Resour. Res., 29(7), 2155–2165.
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© 2007 ASCE.
History
Received: Nov 27, 2002
Accepted: May 19, 2006
Published online: Jan 1, 2007
Published in print: Jan 2007
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