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| Titel |
Direct measurement of the soil water retention curve using X-ray absorption |
| VerfasserIn |
A. Bayer, H.-J. Vogel, K. Roth |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 8, no. 1 ; Nr. 8, no. 1, S.2-7 |
| Datensatznummer |
250005380
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| Publikation (Nr.) |
 copernicus.org/hess-8-2-2004.pdf |
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| Zusammenfassung |
| X-ray absorption measurements have been explored as a fast experimental
approach to determine soil hydraulic properties and to study rapid dynamic processes. As
examples, the pressure-saturation relation θ(Ψ) for a uniform sand column has been
considered as has capillary rise in an initially dry sintered glass column.
The θ(Ψ)-relation is in reasonable agreement with that obtained by inverting a
traditional multi-step outflow experiment. Monitoring the initial phase of capillary rise
reveals behaviour that deviates qualitatively from the single-phase, local-equilibrium regime
described by Richards’ equation.
Keywords: X-ray absorption, soil hydraulic properties, soil water dynamics,
Richards’ equation |
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