ISSN: 1945-7545
Page Count: 3

A Note on Falling Headwater and Rising Tailwater Permeability Tests

Daniel, DE
Associate professor of civil engineering, University of Texas, Austin,TX

Abstract

Falling-head permeability tests may be performed in two ways: (1) with a constant tailwater pressure and (2) with a rising tailwater pressure. Equations published in textbooks and manuals for calculating hydraulic conductivity from a falling-head test are for the first type of test only and are in error by a factor of 2 when applied to the second type of test. The correct equations for calculating hydraulic conductivity for both types of test are derived and confirmed.

Keywords:
permeability, hydraulic conductivity, falling-head test, laboratory, soils, rock, porous media, permeameter, water, Darcy's law

Paper ID: GTJ10990J
DOI: 10.1520/GTJ10990J
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