Research Article
Mar 1965
Sample Size Estimates in Permeability Studies
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VIEW THE REPLYAuthors: Lyman S. Willardson, M.ASCE, and Rex L. HurstAuthor Affiliations
Publication: Journal of the Irrigation and Drainage Division
Volume 91, Issue 1
Abstract
An analysis of field determined permeability data was made that shows how sampling accuracy changes with both permeability and number of samples. An exponential relation was observed between the mean and the variance of permeability data. An analysis of variance performed on the logarithms of permeability data effectively eliminated this relation. Confidence limits calculated from the resulting logarithmic data were properly asymmetrical. Sampling accuracy for successive numbers of samples can be determined for different permeability when the variance is known.
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Published In
Journal of the Irrigation and Drainage Division
Volume 91 • Issue 1 • March 1965
Pages: 1 - 9
Copyright
© 1965 American Society of Civil Engineers.
History
Published in print: Mar 1965
Published online: Feb 11, 2021
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Authors
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Lyman S. Willardson, M.ASCE
Agric. Engr., Southwest Branch, Soil and Water Conservation Research Div., Agric. Research Service, U.S. Dept. Agric
Rex L. Hurst
Prof. and Head, Applied Statistics and Computer Science, Utah State Univ., Logan, Utah
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