Scientific context

ROSES (Groundwater Obsrvation System network) is the network of groundwater observation at national scale (Metropolitan France and Overseas Territories). It is based on the monitoring of more than 80 000 water points for the surveillance of groundwater quality and groundwater levels.


Starting year: 2005

Localisation: France

Keywords: Aquifers, piezometry, water quality, groundwater

Database :

Web site:

PI: Laurence Gourcy

Scientific questions

ROSES aims to monitor one of the major compartments of the Critical Zone: the saturated zones of the subsurface. Thanks to this monitoring, it twill be possible to have a better understanding of groundwater variation in term of water level, but also  resource quality for different aquifers systems over the whole French territory while covering different types of aquifers (from alluvial basins to sedimentary basins, as well as fractured aquifers such as basement aquifers for instance) in a context of global change.

Although ROSES was initially set up to monitor water policies or to prevent drought and flood risk, it can also be used to address various scientific questions, in particular the multi-scale issue, with data assimilation for modeling.

Sites and measured variables

ROSES is deployed throughout the French territory and is based on the monitoring of more than 80 000 monitoring points (wells, boreholes, springs). This corresponds to more than 17 millions piezometric levels, more than 101 millions analysis (in situparameters, major ions, traces, organic compounds (pesticides, pharmaceutical substances, etc.)). The monitoring frequencies of he chemical data range from monthly to annual depending on the pressure on the resource.

The groundwater level, for the network of boreholes of the Water Framework Directive observatory, is recorded every hour.

Partners and further information

Data collection and the monitoring of the several stations are carried out by the Water Agencies, the Regional Directorates for the Environment, Planning and Housingt (DREAL), the Regional Health Agencies (ARS): data from the SISE-EAUX database, from the Ministry of Health, a database supplied by the sanitary control, concerning groundwater captured for the production of for drinking water (only data on raw water), from local authorities (departmental and regional councils, aquifer management syndicates, communities of communes, natural parks), the BRGM and other organizations in charge of public missions. Finally, the data from industrialists in the framework of the monitoring of classified installations and polluted sites are, in part, transferred to ROSES.