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| Titel |
Transient drawdown solution for a constant pumping test in finite two-zone confined aquifers |
| VerfasserIn |
C.-T. Wang, H.-D. Yeh, C.-S. Tsai |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 2 ; Nr. 16, no. 2 (2012-02-13), S.441-449 |
| Datensatznummer |
250013174
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| Publikation (Nr.) |
 copernicus.org/hess-16-441-2012.pdf |
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| Zusammenfassung |
| The drawdown solution has been widely used to analyze
pumping test data for the determination of aquifer parameters when coupled
with an optimization scheme. The solution can also be used to predict the
drawdown due to pumping and design the dewatering system. The drawdown
solution for flow toward a finite-radius well with a skin zone in a confined
aquifer of infinite extent in radial direction had been developed before. To
our best knowledge, the drawdown solution in confined aquifers of finite
extent with a skin zone so far has never before been presented in the
groundwater literature. This article presents a mathematical model for
describing the drawdown distribution due to a constant-flux pumping from a
finite-radius well with a skin zone in confined aquifers of finite extent.
The analytical solution of the model is developed by applying the methods of
Laplace transforms, Bromwich contour integral, and residue theorem. This
solution can be used to investigate the effects of finite boundary and
conductivity ratio on the drawdown distribution. In addition, the inverse
relationship between Laplace- and time-domain variables is used to develop
the large time solution which can reduce to the Thiem solution if there is
no skin zone. |
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