Flow to a Well in a Two-Aquifer System
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VIEW THE REPLYPublication: Journal of Hydrologic Engineering
Volume 12, Issue 2
Abstract
An approximate solution for flow to a well in an aquifer overlain by both an aquitard and a second aquifer containing a free surface is obtained from numerical inversions of exact analytical solutions for Laplace transforms. This study extends previous work on this topic in three ways: (1) it improves an eigenvalue decomposition solution method used earlier by Hemker and Maas in 1987 for unsteady flow in multiaquifer systems; (2) it obtains an approximate solution that is simpler to evaluate than previously known solutions; and (3) it utilizes a much more general solution from a MODFLOW finite-difference model to explore both limitations of the approximate solution and the physical behavior of the two-aquifer system. In addition, criteria are obtained that show when the two-aquifer solution can be replaced with the simpler Boulton solution when analyzing pumping test field data.
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References
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Information
Published In
Journal of Hydrologic Engineering
Volume 12 • Issue 2 • March 2007
Pages: 146 - 155
Copyright
© 2007 ASCE.
History
Received: Apr 20, 2005
Accepted: Jun 22, 2006
Published online: Mar 1, 2007
Published in print: Mar 2007
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