Diagnostic Curves for Identifying Leaky Aquifer Parameters with or without Aquitard Storage
Publication: Journal of Irrigation and Drainage Engineering
Volume 136, Issue 1
Abstract
Two sets of unimodal diagnostic curves, one set assumes no aquitard storage and the other set assumes aquitard storage, are developed for identifying the parameter of leaky aquifers from early drawdowns, which yields accurate estimates of the parameters and lessens the subjectivity due to personal errors. The proposed diagnostic curve method is simple, easy to apply, and is based on matching of the diagnostically plotted observed drawdowns to an appropriate diagnostic curve. The new method is simple, easy to apply, does not require either the initial guess for the parameter values or repetitive evaluation of the leaky aquifer well function, and outperforms the conventional curve-matching, optimization, extended Kalman filter, and artificial neural network methods. The proposed set of diagnostic curves has a good diagnostic property and is able to easily identify nonideal conditions. The new method suggests a shorter duration pumping test, which would save time, money, and water. It is hoped that the proposed method would be useful to the field engineers and practitioners.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 136 • Issue 1 • January 2010
Pages: 47 - 57
Copyright
© 2010 ASCE.
History
Received: Jun 15, 2008
Accepted: May 1, 2009
Published online: May 6, 2009
Published in print: Jan 2010
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