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Published online 13 June 2005
Published in Vadose Zone J 4:481-487 (2005)
DOI: 10.2136/vzj2004.0134
© 2005 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Analysis of Temperature Effects on Tension Infiltrometry of Low Permeability Materials

Paolo Castiglionea, Peter J. Shouseb,*, Binayak P. Mohantyc and Martinus Th. van Genuchtenb

a Land Resources and Environmental Science Dep., Montana State Univ., 334 Leon Johnson Hall, Bozeman, MT 59717
b USDA-ARS, George E. Brown, Jr. Salinity Laboratory, 450 W. Big Springs Rd., Riverside, CA, 92507
c Dep. of Biological and Agricultural Engineering, 301 Scoates Hall, Texas A&M Univ., College Station, TX 77843-2117


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  		Fig. 1. Schematic of typical tension infiltrometer.

 


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  		Fig. 2. Schematic of conventional Mariotte tower under (a) flowing conditions, (b) static conditions after increased ambient temperature and modified Mariotte tower under (c) flowing conditions and (d) static conditions after increased ambient temperature.

 


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  		Fig. 3. (a) Schematic of typical Mariotte and reservoir system under flowing conditions (top), as well as for (b) static conditions with increasing ambient temperature for reservoir pressures greater than the Mariotte pressure (Case A) and (c) less than the Mariotte pressure (Case B).

 


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  		Fig. 4. Observed Mariotte pressure variations (P) as affected by imposed ambient temperature fluctuations (T) under no-flow conditions in controlled temperature room.

 


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  		Fig. 5. Calculated pressure changes ({Delta}P) as a function of {epsilon}M for different values of the initial height (a) of the air pocket.

 


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  		Fig. 6. Calculated overpressure as a function of the Mariotte {epsilon}M at different locations within the infiltrometer system.

 




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