Multi-site validation of the swat model on the bani catchment: model performance and predictive uncertainty

The objective of this study was to assess the performance and predictive uncertainty of the Soil and Water Assessment Tool (SWAT) model on the Bani River Basin, at catchment and subcatchment levels. The SWAT model was calibrated using the Generalized Likelihood Uncertainty Estimation (GLUE) approach. Potential Evapotranspiration (PET) and biomass were considered in theverificationofmodeloutputsaccuracy. GlobalSensitivityAnalysis(GSA)wasusedforidentifying important model parameters. Results indicated a good performance of the global model at daily as well as monthly time steps with adequate predictive uncertainty. PET was found to be overestimated but biomass was better predicted in agricultural land and forest. Surface runoff represents the dominant process on streamflow generation in that region. Individual calibration at subcatchment scale yielded better performance than when the global parameter sets were applied. These results are very useful and provide a support to further studies on regionalization to make prediction in ungauged basins.

Jamilatou Chaibou BEGOU    

Seifeddine JOMAA    

Sihem BENABDALLAH    

Pibgnina BAZIE    

Abel AFOUDA    

Michael RODE    

AGRHYMET, WASCAL    

SWAT    

Bani    

Afrique de l'Ouest    

Discharge    

Calibration    

Incertitude    

Changement climatique    

WASCAL&FFEM/CC

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Anglais

Niger    

BIBLIOTHEQUE    

CAL-0598

Bibliothèque