License License GPL 2 GPL 2

The airGR galaxy is a suite of R packages and graphical interfaces built around the GR family of hydrological models, covering core rainfall–runoff modelling, teaching, datasets, data assimilation, integrated water resources management, baseflow analysis, and spatial mapping of GR parameters in France

airGR: Core modelling

Provides the GR rainfall–runoff models (e.g. GR4H, GR5H, GR4J, GR5J, GR6J, GR2M, GR1A) and the CemaNeige snow model, with tools for data preparation, calibration, simulation, and performance assessment.

airGRteaching: Teaching package and GUI

R package that simplifies the use of GR models for education and training, and that includes an embedded graphical interface to run typical hydrological modelling exercises without advanced R skills.

airGRiwrm: Water resources management package

R package extending airGR to semi-distributed modelling at the river-basin scale, explicitly representing human influences such as reservoirs, abstractions, and diversions for integrated water resources management.

airGRdatassim: Data assimilation package

R package adding data assimilation capabilities on top of the GR models, enabling integration of observations (e.g. streamflow, meteorological data) in real time, particularly for forecasting and operational simulations.

airGRdatasets: Example data package

R package providing hydrometeorological datasets (precipitation, discharge, etc.) for testing, benchmarking, and demonstrating the GR models, and for reproducing examples from tutorials and publications.

baseflow: Baseflow analysis package

R package providing tools to estimate and separate baseflow from total streamflow time series, useful for analysing low-flow components and groundwater contributions consistently with GR-based modelling.

airGRmaps: Shiny mapping interface

Shiny-based graphical tool providing maps of GR4J and GR5J model parameters over France, designed to get parameters for ungauged catchments.