Impact of climate seasonality on catchment yield: a parameterization for commonly-used water balance formula | Impact de la saisonnalité du climat sur le rendement en eau des bassins versants: une paramétrisation pour les formules usuelles de bilan en eau
2018
de Lavenne, Alban | Andréassian, Vazken | Hydrosystèmes continentaux anthropisés : ressources, risques, restauration (UR HYCAR) ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)
[Departement_IRSTEA]Eaux [TR1_IRSTEA]ARCEAU [ADD1_IRSTEA]Hydrosystèmes et risques naturels
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Mostrar más [+] Menos [-]Inglés. This paper examines the hydrological impact of the seasonality of precipitation and maximum evaporation: seasonality is, after aridity, a second-order determinant of catchment water yield. Based on a data set of 171 French catchments (where aridity ranged between 0.2 and 1.2), we present a parameterization of three commonly-used water balance formulas (namely, Turc-Mezentsev, Tixeront-Fu and Oldekop formulas) to account for seasonality effects. We quantify the improvement of seasonality-based parameterization in terms of the reconstitution of both catchment streamflow and water yield. The significant improvement obtained (reduction of RMSE between 9 and 14% depending on the formula) demonstrates the importance of climate seasonality in the determination of long-term catchment water balance.
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