GRAFFAS : Space-time simulation of hourly rainfall from areal statistics accounting for spatial heterogeneity

GRAFFAS model generates hourly rainfall fields from areal statistics. It can be applied on climatically diverse domains. More explanation about the model in Cantet et al 2024 : Space-time simulation of hourly rainfall from areal statistic published in Water Resources Research http://dx.doi.org/10.1029/2024WR038562. 

Here (in the GRAFFAS-v0.tar), codes for calibrating and running GRAFFAS are available. A dataset ( gridded hourly rainfall on Gapeau and Paris domains from COMEPHORE product) is provided to run codes (from calibration to simulation) in ./DATA folder.

Note that COMEPHORE dataset (gridded hourly precipitation in continental France) is freely available in https://meteo.data.gouv.fr/datasets/669e23a7ce052a9e8521b75e.

Codes are implemented in R. Mandatory packages are listed in ./InstallNeededPackages.r, this routine enables to install them. Codes were tested only on Lunix platform. Using Mac-OS and Windows should be ok. Nevertheless, Lunix platform is recommended to use correctly parallel::mclapply() function. 

File ./main.r calibrates and runs GRAFFAS model from the provided dataset (Gapeau domain). GRAFFAS parameters and simulation are saved in ./SAVE_STEP folder while simulations are stored in ./RRsim folder. 

All needed internal functions to run main.r are stored in ./FUNCTIONS folder.