Transient Flow into a Partially Penetrating Well during the Constant-Head Test in Unconfined Aquifers
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 9
Abstract
This study derives a semianalytical solution for drawdown distribution during a constant-head test at a partially penetrating well in an unconfined aquifer. The constant-head condition is used to describe the boundary along the screen. In addition, a free-surface condition is used to delineate the upper boundary of the unconfined aquifer. The Laplace-domain solution is then derived using separation of variables and Laplace transform. This solution can be used to identify the aquifer parameters from the data of the constant-head test when integrated with an optimization scheme or to investigate the effects of vertical flow caused by the partially penetrating well and free-surface boundary in an unconfined aquifer.
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Acknowledgments
Research leading to this work has been partially supported by the grants from Taiwan National Science Council under the contract numbers NSCTNSC 96-2221-E-009-087-MY3, NSC NSCT98-3114-E-007-015, and NSCTNSC 99-NU-E-009-001.
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Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 9 • September 2011
Pages: 1054 - 1063
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 9, 2010
Accepted: Dec 27, 2010
Published online: Dec 29, 2010
Published in print: Sep 1, 2011
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