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Soil Science Society of America Journal Abstract -

High Intensity X-Ray and Tensiometer Measurements in Rapidly Changing Preferential Flow Fields


This article in SSSAJ

  1. Vol. 57 No. 5, p. 1188-1192
    Received: Apr 27, 1992

    * Corresponding author(s):
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  1. Yaping Liu,
  2. Tammo S. Steenhuis ,
  3. J.-Yves Parlange,
  4. Barnes R. Bierck and
  5. John S. Selker
  1. Dep. of Agricultural and Biological Engineering, Cornell Univ., Ithaca, NY 14853
    Dep. of Civil, Mechanical, and Environmental Engineering, George Washington Univ., Washington, DC 20052
    Dep. of Bioresource Engineering, Oregon State Univ., Corvallis, OR 97331



Synchrotron x-rays at the Cornell High Energy Synchrotron Source (CHESS) and other available facilities provide a high-resolution means of quantitatively studying rapid changes of fluid content in porous media. This technique is based on monitoring x-ray absorbance changes in sand volumes traversed by an intense, highly collimated synchrotron x-ray beam. The high intensity and brightness of synchrotron radiation permit acquisition of statistically significant x-ray count data each second during the drying process of fingered flow. Simultaneous measurement of water pressure using tensiometers provides a reliable dynamic measurement of drying curves.

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