The French water Agency Rhin-Meuse (AERM) has initiated the development of the second version of Pegase, using a GIS (Arc-Info) to process carthographic input data and present the results (years 1993-1995).

The collaboration between AERM and Aquapole keeps going, either to enhance the Rhine-Meuse application, or when participating to transnational watershed modelling (Chiers, Mosel, Meuse), to help in software development (phytobenthos, PegOpera, …) or to support PhDs.

Currently, the simulation domaine Rhine-Meuse models 13 560 km of rivers (network of 1 058 rivers) for 34 000 km² watershed, located in the international hydrographic districts of the Meuse River and the du Rhine River (Mosel, Rhine).

AERM use themselves the Pegase model since 1995, first on a dedicated Unix workstation located in the Agency premices. They use the PegOpera version on PC since 2011.