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| Titel |
How crucial is it to account for the antecedent moisture conditions in flood forecasting? Comparison of event-based and continuous approaches on 178 catchments |
| VerfasserIn |
L. Berthet, V. Andréassian, C. Perrin, P. Javelle |
| 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. 6 ; Nr. 13, no. 6 (2009-06-18), S.819-831 |
| Datensatznummer |
250011899
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| Publikation (Nr.) |
 copernicus.org/hess-13-819-2009.pdf |
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| Zusammenfassung |
| This paper compares event-based and continuous hydrological modelling approaches
for real-time forecasting of river flows. Both approaches are compared using
a lumped hydrologic model (whose structure includes a soil moisture accounting
(SMA) store and a routing store) on a data set of 178 French catchments. The
main focus of this study was to investigate the actual impact of soil moisture
initial conditions on the performance of flood forecasting models and the
possible compensations with updating techniques. The rainfall-runoff model
assimilation technique we used does not impact the SMA component of the model
but only its routing part. Tests were made by running the SMA store continuously
or on event basis, everything else being equal. The results show that the
continuous approach remains the reference to ensure good forecasting performances.
We show, however, that the possibility to assimilate the last observed flow
considerably reduces the differences in performance. Last, we present a robust
alternative to initialize the SMA store where continuous approaches are
impossible because of data availability problems. |
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