Simple Equations for Aquifer Parameters from Drawdowns in Large-Diameter Wells
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 133, Issue 3
Abstract
Simple equations are proposed for estimating storage coefficient and transmissivity of an aquifer from drawdowns in large- diameter wells. The proposed method requires determination of the peak and time to peak of a unimodal curve. Using these values and utilizing the provided set of equations, the aquifer parameters are estimated through an iterative procedure. The proposed method is void of subjectivity involved in the previously proposed curve matching methods. Also, the new method can be used when the conventional curve matching methods cannot be applied to estimate the aquifer parameters. The new method can be used to estimate the aquifer parameters from the drawdown data observed only up to a time so that the peak could be determined.
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References
Papadopulos, I. S., and Cooper, H. H. (1967). “Drawdown in a well of large diameter.” Water Resour. Res., 3(1), 241–244.
Singh, S. K. (2000). “Simple method for confined-aquifer parameter estimation.” J. Irrig. Drain. Eng., 126(6), 404–407.
Wikramaratna, R. S. (1985). “A new type curve method for the analysis of pumping tests in large diameter wells.” Water Resour. Res., 21(2), 261–264.
Zdankus, N. T. (1974). “Analysis of shallow hard rock well pumping and recovery test data.” Ground Water, 12(5), 310–317.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 133 • Issue 3 • June 2007
Pages: 279 - 281
Copyright
© 2007 ASCE.
History
Received: May 21, 2006
Accepted: Jan 2, 2007
Published online: Jun 1, 2007
Published in print: Jun 2007
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