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| Titel |
Confrontation of three rainfall-runoff models in assessment of hydrological drought in the upper Nitra river basin in Slovakia |
| VerfasserIn |
Oliver Horvat, Andrej Machlica, Jacob Oosterwijk, Miriam Fendekova |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250040894
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| Zusammenfassung |
| This study is oriented on using rainfall-runoff models for assessment of hydrological drought and runoff simulations in the Upper Nitra River Basin. Three models were selected for this purpose: BILAN – lumped, conceptual model developed in Czech Republic, HBV – semi-distributed, conceptual model developed in Sweden and FRIER – physically based distributed model developed in Slovakia. The evaluation period last from from 1st of January 1981 to 31th of December 2007 in daily time step. Results show that models have a high Nash-Sutcliffe coefficient, which indicates a good agreement between observed and simulated discharge. In terms of droughts, BILAN model gave less but longer droughts because of a slow reaction of the model in each part of the hydrological cycle (surface, soil moisture, groundwater). FRIER outputs showed more, but shorter droughts, due to a faster reaction to precipitation than HBV and BILAN. Soil moisture drought was represented more realistic by FRIER than by BILAN. Small time-shift in the groundwater drought occurrence was found in some cases comparing BILAN and FRIER.
Acknowledgement
The research presented in this paper was supported by Slovak Research and Development Agency under the contracts No. LPP-0254-07 and APVV-0378-07, by Slovak Scientific Grant Agency under the contracts No. VEGA 1/0783/08, 2/0096/08 and 1/0103/10 and by FP6 WATCH. |
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