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Published online 16 August 2005
Published in Vadose Zone J 4:881-884 (2005)
DOI: 10.2136/vzj2004.0159
© 2005 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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NOTES

Gas-Phase Partitioning Tracer Test Method for Water Content Measurement

Evaluating Efficacy for a Range of Porous-Medium Textures

Sheng Peng and Mark L. Brusseau*

Soil, Water and Environmental Science Dep., Mark L. Brusseau, Hydrology and Water Resources Dep., 429 Shantz Building, #38, The Univ. of Arizona, Tucson, AZ 85721
* Corresponding author (brusseau{at}ag.arizona.edu)

Received 28 October 2004.

Gas-phase partitioning tracer tests were conducted to measure water content for several porous media with different mean particle diameters and particle-size distributions. Methane was used as the nonreactive tracer and difluoromethane was used as the water-partitioning tracer. Water contents determined from the tracer-test results were similar to values measured gravimetrically. These results support the utility of the gas-phase tracer method for measuring water content in a variety of porous media.

Abbreviations: DFM, diflouromethane • U, uniformity coefficients






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