Unsteady Drawdown of Water Table
Publication: Journal of Irrigation and Drainage Engineering
Volume 116, Issue 4
Abstract
This paper deals with the development of equations to predict water‐table geometry for flow toward a drain ditch or reservoir whose water surface level is subject to a sudden specified drop. A closed function representing the water‐table geometry is obtained for the classical potential formulation of the problem under initial and boundary conditions related by means of perturbation method. The first‐order term of this closed function is identical to the solutions published by Higgins (1980), for large values of time, by Stallman (1962), and by Bear (1974). The inclusion of the second and third order terms improved the accuracy considerably. The water table profile found as a function of only one variable is predicted for various values, ranging between and 0. Temporal and spatial variations of the water table are obtained for various μ values. The comparison of the present results with those of previous works is also presented.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 116 • Issue 4 • July 1990
Pages: 508 - 526
Copyright
Copyright © 1990 ASCE.
History
Published online: Jul 1, 1990
Published in print: Jul 1990
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