Improved apparatus for measuring hydraulic conductivity at low water content

Soil Science Society of America Journal
By: , and 

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Abstract

A modification of the steady-state centrifuge method (SSCM) for unsaturated hydraulic conductivity (K) measurement improves the range and adjustability of this method. The modified apparatus allows mechanical adjustments to vary the measured K by a factor of 360. In addition, the use of different flow-regulating ceramic materials can give a total K range covering about six orders of magnitude. The increment of K adjustment is a factor of about 1.6. This makes it potentially useful for measuring targeted values of K or, through a trial and error procedure, of water content (θ). The range extension afforded by this modification has led to the lowest steady-state K measurement to date: 1.1 × 10−11 m/s at θ of 0.068 m3water/m3 for a sandy soil of the Delhi series (mixed, thermic Typic Xeropsamment).

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Improved apparatus for measuring hydraulic conductivity at low water content
Series title Soil Science Society of America Journal
DOI 10.2136/sssaj1992.03615995005600060017x
Volume 56
Issue 6
Year Published 1992
Language English
Publisher ACSESS
Contributing office(s) Toxic Substances Hydrology Program
Description 4 p.
First page 1758
Last page 1761
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