The main study site of the Observatoire Hydro-Géochimique de l’Environnement (OHGE) is a granitic catchment basin: the Strengbach Watershed. This forested site is located in the Vosges Massif between 800 and 1100 meters high.
The ecosystem and its changes, linked to natural or anthropic disturbances, are monitored, explored and studied since 1986 throughout a multidisciplinary approach.