Ouermi S., Paturel Jean-Emmanuel, Karambiri H. (2015). Transposabilité temporelle des paramètres de modèles hydrologiques dans un contexte de changement climatique en Afrique de l'Ouest et Centrale. In :
African hydrology research. Hydrological Sciences Journal = Journal des Sciences Hydrologiques, 60 (11 no spécial), p. 1984-2002. ISSN 0262-6667.
Titre du document
Transposabilité temporelle des paramètres de modèles hydrologiques dans un contexte de changement climatique en Afrique de l'Ouest et Centrale
Hydrological Sciences Journal = Journal des Sciences Hydrologiques, 2015,
60 (11 no spécial), p. 1984-2002 ISSN 0262-6667
This paper investigates whether the calibrated parameter values for two rainfall-runoff models based on historical observed data can be used to reliably predict runoff responses to changes in future climate inputs. Analyses are carried out using historical monthly climate and runoff data from 27 catchments in West and Central Africa. Better performances are obtained when the models are calibrated on a dry period to predict runoff in a wet period. Similarly, it is easier for the models calibrated on a period of large hydroclimatic variability to predict runoff in a period of small hydroclimatic variability than the contrary. This paper tests also the assumption that transferability of rainfall-runoff models, variable hydroclimatic conditions, and local sensitivity of the model parameters can be linked. The inconclusive results still show variability according to the chosen efficiency criteria and selected periods. All these results indicate that the transfer of model parameters from one period to another can introduce a significant error in runoff simulations, which means increased uncertainty in the assessment of impact of climate and environmental changes, an essential question for West and Central Africa.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Sciences du milieu [021]
;
Hydrologie [062]
