LARHYSS Journal
Volume 15, Numéro 2, Pages 71-85
2018-11-30

Comparative Performances Analysis Of Four Daily Rainfall-runoff Models, Applied On Semi-arid Watersheds (algeria)



Authors : Benkaci Tarik . Dechemi Noureddine .

Abstract

ABSTRACT In this paper, we have tested four rainfall-runoff models on daily time scale that we have picked out amongst more than ten models the most used in hydrology. These models were applied on four basins situated in North of Algeria, that are characterized by an arid climate and different hydrologic regime. The aim of this work is to choose a best rainfall-runoff model that we can use for simulation and prediction runoff. The comparative analysis between these models is based on numerical criterions like Nash-Sutcliffe criterion and has been geared towards the capacity of models to reproduce flood events and base flow. The results of simulation confirm that the GR4J model has given the best performances and is regarded as the most robust for semi-arid regions and fluctuant hydrological regime. RESUME Dans cet article, nous avons testé quatre modèles pluie-débit au pas de temps journalier que nous avons sélectionnés parmi dix modèles les plus utilisés en hydrologie. Ces modèles ont été testés sur des bassins du Nord de l’Algérie, caractérisés par un climat semi-aride et un régime hydrologique variable. L’objectif principal est de valider un modèle qui sera utilisé dans le cadre d’une simulation des débits et des apports liquides au niveau d’une station hydrométrique. Après une analyse comparative, quantitative et qualitative entre ces modèles, il est apparu que le modèle GR4J a donné les meilleurs résultats de modélisation, et est considéré comme le plus robuste pour la simulation des débits pour les climats semi-arides et irréguliers.

Keywords

Rainfall-runoff Model ; Hydrology ; Algeria ; Semi arid Climate ; GR4J model

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