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Book: Tomography of Soil-Water-Root Processes
Published by: Soil Science Society of America, American Society of Agronomy, and Crop Science Society of America

 

This chapter in TOMOGRAPHY OF SOIL-WATER-ROOT PROCESSES

  1.  p. 17-28
    SSSA Special Publication 36.
    Tomography of Soil-Water-Root Processes

    S. H. Anderson and J. W. Hopmans (ed.)

    ISBN: 978-0-89118-931-2

     

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doi:10.2136/sssaspecpub36.c3

X-Ray Tomography of Soil Properties

  1. Jan W. Hopmans,
  2. Milena Cislerova and
  3. Tomas Vogel
  1. University of California, Davis, California

Abstract

X-ray computed tomography presents an exciting alternative for soil and water measurements. Not only is the measurement nonstructured and noninvasive, it also provides soil data with a spatial resolution of 1 mm or less. In this regard, x-ray tomographic measurements can further help the soil physicist to understand flow and transport processes. Our objective is to present the capabilities and limitations of current medical x-ray tomography scanners, by giving two examples. The first example summarizes the results of an earlier reported study, and demonstrates the spatial and temporal variability of soil moisture in draining soil cores. In the second example, we applied x-ray tomography to characterize soil porosity variability. Both experiments show that, although soil and water properties can be determined with a spatial resolution of 1 mm or smaller, further development of this technique is needed to beneficially use x-ray tomography in flow and transport studies.

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Copyright © 1994. Copyright © 1994 by the Soil Science Society of Agronomy, Inc., 5585 Guilford Rd., Madison, WI 53711 USA