Regression-Based Interpretation Method for Confined Aquifer Pumping Tests

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dc.authoridŞahin, Ufuk/0000-0001-7340-7117en_US
dc.contributor.authorÇiftçi, Emin
dc.contributor.authorŞahin, A. Ufuk
dc.date.accessioned2024-07-12T21:37:56Z
dc.date.available2024-07-12T21:37:56Z
dc.date.issued2023en_US
dc.department[Belirlenecek]en_US
dc.description.abstractThe constant-discharge pumping test is a widely used aquifer characterization tool for estimating hydrogeological parameters. Various graphical and numerical solution techniques have been devised for interpretation of pumping test results. This study proposes an alternative regression-based solution approach for analyzing pumping tests conducted in nonleaky, confined aquifers. A regression model was developed by making use of the similarity solution that describes the temporal drawdown behavior at a monitoring well within a pumping period. The field curve obtained from a pumping test (drawdown versus time data) and the theoretical type curve (dimensionless drawdown versus dimensionless time) exhibit identical behavior in logarithmic scale. Correspondingly, based on the equivalence of the area above these two curves, the proposed regression equation establishes a link between a selected drawdown value and its dimensionless counterpart. Once this drawdown value is associated with the corresponding dimensionless drawdown, the explored aquifer transmissivity and storativity can be retrieved easily with the similarity solution. The proposed fit equation enables users to retrieve hydrogeological parameters effortlessly by eradicating the difficulties encountered while implementing conventional graphical or optimization-based methods. The method was tested for a large number of hypothetical noise-free and noise-perturbed time drawdown data sets, each synthesized with different aquifer parameters within a wide range, and in all these attempts the proposed algorithm achieved providing highly accurate parameter estimates. In addition, two published test cases were employed to assess the estimation performance of the method in comparison with the existing techniques. The developed solution scheme was revealed to yield results in very good agreement with those reported in previous works. Considering the accuracy of the method and the ease of its implementation, the proposed approach can be a practical tool for analyzing constant-discharge tests performed in confined aquifers.en_US
dc.identifier.doi10.1061/(ASCE)HE.1943-5584.0002235
dc.identifier.issn1084-0699
dc.identifier.issn1943-5584
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85143659906en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1061/(ASCE)HE.1943-5584.0002235
dc.identifier.urihttps://hdl.handle.net/20.500.12415/6968
dc.identifier.volume28en_US
dc.identifier.wosWOS:000899333800002en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherAsce-Amer Soc Civil Engineersen_US
dc.relation.ispartofJournal of Hydrologic Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmzKY04310
dc.subjectConfined Aquiferen_US
dc.subjectInverse Problemen_US
dc.subjectPumping Testen_US
dc.subjectRegressionen_US
dc.subjectParameter Estimationen_US
dc.titleRegression-Based Interpretation Method for Confined Aquifer Pumping Testsen_US
dc.typeArticle
dspace.entity.typePublication

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