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| Titel |
Uncertainty analysis in model parameters regionalization: a case study involving the SWAT model in Mediterranean catchments (Southern France) |
| VerfasserIn |
H. Sellami, I. La Jeunesse, S. Benabdallah, N. Baghdadi, M. Vanclooster |
| 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 ; 18, no. 6 ; Nr. 18, no. 6 (2014-06-26), S.2393-2413 |
| Datensatznummer |
250120396
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| Publikation (Nr.) |
 copernicus.org/hess-18-2393-2014.pdf |
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| Zusammenfassung |
| In this study a method for propagating the hydrological model uncertainty in
discharge predictions of ungauged Mediterranean catchments using a model
parameter regionalization approach is presented. The method is developed and
tested for the Thau catchment located in Southern France using the SWAT
hydrological model. Regionalization of model parameters, based on physical
similarity measured between gauged and ungauged catchment attributes, is a
popular methodology for discharge prediction in ungauged basins, but it is
often confronted with an arbitrary criterion for selecting the
"behavioral" model parameter sets (Mps) at the gauged catchment. A more
objective method is provided in this paper where the transferrable Mps are
selected based on the similarity between the donor and the receptor
catchments. In addition, the method allows propagating the modeling
uncertainty while transferring the Mps to the ungauged catchments. Results
indicate that physically similar catchments located within the same
geographic and climatic region may exhibit similar hydrological behavior and
can also be affected by similar model prediction uncertainty. Furthermore,
the results suggest that model prediction uncertainty at the ungauged
catchment increases as the dissimilarity between the donor and the receptor
catchments increases. The methodology presented in this paper can be
replicated and used in regionalization of any hydrological model parameters
for estimating streamflow at ungauged catchment. |
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