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| Titel |
Development and evaluation of an efficient soil-atmosphere model (FHAVeT) based on the Ross fast solution of the Richards equation for bare soil conditions |
| VerfasserIn |
A.-J. Tinet, A. Chanzy, I. Braud, D. Crevoisier, F. Lafolie |
| 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 ; 19, no. 2 ; Nr. 19, no. 2 (2015-02-20), S.969-980 |
| Datensatznummer |
250120633
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| Publikation (Nr.) |
 copernicus.org/hess-19-969-2015.pdf |
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| Zusammenfassung |
| In agricultural management, a good timing in operations, such as irrigation
or sowing, is essential to enhance both economical and environmental
performance. To improve such timing, predictive software are of particular
interest. Optimal decision-software would require process modules
which provide robust, efficient and accurate predictions while being based
on a minimal amount of parameters easily available. The objective of this
study is to assess the accuracy of a physically based model with high
efficiency. To this aim, this paper develops a coupled model with climatic
forcing based on the Ross fast solution for Richards' equation, heat transfer and
detailed surface energy balance. The present study is limited to bare soil,
but the impact of vegetation can be easily included. The developed model,
FHAVeT (Fast Hydro Atmosphere Vegetation Temperature), is evaluated against
the coupled model based on the Philip and
De Vries (1957) description, TEC. The two
models were compared for different climatic and soil conditions. Moreover,
the model allows using various pedotransfer functions. The FHAVeT model
showed better performance in regards to mass balance, mostly below 0.002 m,
and generally improved computation time. In order to allow for a more
precise comparison, six time windows were selected. The study demonstrated
that the FHAVeT behaviour is quite similar to the TEC behaviour except under
some dry conditions. The ability of the models to detect the occurrence of
soil intermediate water content thresholds with a 1 day tolerance was also
evaluated. Both models agreed in more than 90% of the cases. |
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