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| Titel |
Field-scale apparent hydraulic parameterisation obtained from TDR time series and inverse modelling |
| VerfasserIn |
U. Wollschläger, T. Pfaff, 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 ; 13, no. 10 ; Nr. 13, no. 10 (2009-10-23), S.1953-1966 |
| Datensatznummer |
250012030
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| Publikation (Nr.) |
 copernicus.org/hess-13-1953-2009.pdf |
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| Zusammenfassung |
| Due to the large heterogeneity in the hydraulic properties of natural soils,
estimation of field-scale hydraulic parameters is difficult. Past
research revealed that data from accurate but small-scale laboratory
measurements could hardly ever be transferred to the field scale. In this study,
we explore an alternative approach where apparent hydraulic properties of a
layered soil profile are directly estimated from hydraulic inverse modelling
of a time series of in situ measured soil water contents obtained from time
domain reflectometry. The data covered a one-year period with both wet and dry
soil conditions. For the time period used for inversion, the model is able to
reproduce the general evolution of water content in the different soil layers
reasonably well. However, distinct drying and wetting events could not be
reproduced in detail which we explain by the complicated natural processes that
are not fully represented in the rather simple model. The study emphasises the
importance of a correct average representation of the soil-atmosphere
interaction. |
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