The figure below presents the GR4J model (in French, modèle du Génie Rural à 4 paramètres Journalier). More recent versions of the model exist: with five parametres (GR5J; Le Moine, 2008) and six parametres (GR6J; Pushpalatha, 2013). They were developed to provide a better simulation of low flows.

GR4J

The functioning of the GR4J model is detailed here.

To know more: check our publications.

Softwares:

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