Frequency dependent hydraulic properties estimated from oscillatory pumping tests in an unconfined aquifer

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Frequency dependent hydraulic properties estimated from oscillatory pumping tests in an unconfined aquifer

http://dx.doi.org/10.1016/j.jhydrol.2015.08.021 0022-1694/ 2015 Elsevier B.V. All rights reserved. ⇑ Corresponding author at: Department of Energy Resources Engineering, Stanford University, Stanford, CA 94035, USA. Tel.: +1 650 723 1594. E-mail address: [email protected] (A. Rabinovich). Avinoam Rabinovich a,⇑, Warren Barrash , Michael Cardiff , David L. Hochstetler , Tania Bakhos , Gedeon...

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Airflow induced by pumping tests in unconfined aquifer with a low-permeability cap

[1] Most analytical and numerical models developed to analyze pumping test data focus on saturated flow below the water table. Traditionally the soil above the initial water table prior to pumping has been thought to have little influence on the test results and has usually been ignored. It is hypothesized that, if the unsaturated zone is capped by low-permeability soil, airflow in the unsatura...

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Data processing for oscillatory pumping tests

Characterizing the subsurface is important for many hydrogeologic projects such as site remediation and groundwater resource exploration. Methods based on the analysis of conventional pumping tests have the notable disadvantage that at a certain distance, the signal is small relative to the noise due to the effects of recharge, pumping in neighboring wells, change in the level or adjacent strea...

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Estimating aquifer hydraulic properties using sinusoidal pumping at the Savannah River site, South Carolina, USA

A framework for estimating aquifer hydraulic properties using sinusoidal pumping is presented that (1) derives analytical solutions for confined, leaky, and partially penetrating conditions; (2) compares the analytical solutions with a finite element model; (3) establishes a field protocol for conducting sinusoidal aquifer tests; and (4) estimates aquifer parameters using the analytical solutio...

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Semi-analytical solution for flow in a leaky unconfined aquifer toward a partially penetrating pumping well

r a 200 .029 : +1 208 cgiss.bo Summary A semi-analytical solution is presented for the problem of flow in a system consisting of unconfined and confined aquifers, separated by an aquitard. The unconfined aquifer is pumped continuously at a constant rate from a well of infinitesimal radius that partially penetrates its saturated thickness. The solution is termed semi-analytical because the exact...

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ژورنال

عنوان ژورنال: Journal of Hydrology

سال: 2015

ISSN: 0022-1694

DOI: 10.1016/j.jhydrol.2015.08.021