Recession Analysis of Drought Flow Using Hele Shaw Model
Publication: Journal of Hydrologic Engineering
Volume 10, Issue 2
Abstract
This study presents recession analyses of drought flow from a sloping aquifer on a hillslope. The experimental part of the study uses a Hele Shaw model as a creeping flow model. The theoretical part applies the nonlinear Boussinesq equation with an open downstream boundary. The slopes of the recession curves on full-log paper at short times are the same whether the bottom slope of the aquifer is small or not. Conversely, those for the horizontal aquifer at long times are completely different from those for the sloping aquifer. The results have shown that the bottom slope generates a point of maximum water depth in the aquifer. The experimental data have also indicated that the water depth at the downstream end is not constant, but is a decreasing function of time.
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Acknowledgments
The writer is indebted to Y. Asai, T. Iijima, and S. Kawarai, who were undergraduate students in the Department of Civil Engineering, Kanazawa Institute of Technology, Ishikawa Prefecture, Japan, for conducting the experimental part of this study for their B.S. theses.
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Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 10 • Issue 2 • March 2005
Pages: 125 - 132
Copyright
© 2005 ASCE.
History
Received: Jul 7, 2003
Accepted: Mar 28, 2004
Published online: Mar 1, 2005
Published in print: Mar 2005
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