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| Titel |
Novel evaporation experiment to determine soil hydraulic properties |
| VerfasserIn |
K. Schneider, O. Ippisch, 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 ; 10, no. 6 ; Nr. 10, no. 6 (2006-11-09), S.817-827 |
| Datensatznummer |
250008285
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| Publikation (Nr.) |
 copernicus.org/hess-10-817-2006.pdf |
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| Zusammenfassung |
| A novel experimental approach to determine soil hydraulic material properties
for the dry and very dry range is presented.
Evaporation from the surface of a soil column is controlled by a constant flux of preconditioned air and the
resulting vapour flux is measured by infrared absorption spectroscopy. The data
are inverted under the assumptions that (i) the simultaneous movement of water
in the liquid and vapour is represented by Richards' equation with an effective
hydraulic conductivity and that (ii) the coupling between the soil and the
well-mixed atmosphere can be modelled by a boundary layer with a constant
transfer resistance. The optimised model fits the data exceptionally well.
Remaining deviations during the initial phase of an experiment are thought to be
well-understood and are attributed to the onset of the heat flow through the
column which compensates the latent heat of evaporation. |
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