Coordination : P. Davy (CNRS Rennes)

Technical coordination : T. Le Borgne (CNAP)

Site managers : O. Bour (U. Rennes I), G. Porel (U. Poitiers), P.Pezard (CNRS Montpellier), K. Chalikakis (U. Avignon), , J. Chéry (U. Montpellier), J-C. Maréchal (BRGM)

Database manager : A. Battais (U. Rennes I)


Research teams : IFR CAREN / UMR Géosciences Rennes, UMR HYDRASA Poitiers, FR ISTEEM Montpellier

Institutions : CNRS, Université de Rennes I, Université de Poitiers, Université de Montpellier II, CEA Cadarache, Régie municipale de Ploemeur

Scientific collaborations : IMFS Strasbourg, IMF Toulouse, IUEM Brest, IFP Rueil-Malmaison, BRGM, IRSN, Universities of Birmingham, Edimbourg and Leeds (R.U.), The University of Maine (U.S.A.), Universisy of Oviedo (Spain), ETH Zürich (Switzerland), Institut Weizmann (Israel), Polytechnical University of Catalogna (Spain)

Structure and operation

The H+ Observatory is built on 5 components.

The hydrogeological sites


The kernel of the observatory consists of these 4 sites, which are complementary in terms of geological medium, exploitation and research objectives. All aquifers are extremely heterogeneous, porous and fractured. The sites are heavily instrumented so as to allow for long term experiments, and/or the filing of the time constants relevant to the evolution of the medium. They are all potentially international references when it comes to hydrogeological experimentation. H+ allows the development of field experiments, ensures the coherence of protocols and the global operation on the long term, unites the data and the instruments into an organized network through which they can be placed at the disposal of the scientific community.

The experimental sites


The experimental sites are distinct from the hydrogeological sites. Their function consists in the testing and validation of technological developments and/or experimental procedures. They are often to be found in the vicinity of the research laboratories that are partners in H+. The three main sites are the Centre d’Etude et d’Enseignement de Lavalette, near Montpellier (south of France), the site of the Beaulieu campus in Rennes (Brittany, France), and the experimental platform in Strasbourg (Alsace, France).

The observation, measurement, and experimentation tools


The ability to gather relevant informations on the structure of the hydrogeological medium and the mass/solute flux inside it is a key element in the success of the H+ observatory. The globalization of existing powerful tools and the development of new tools are therefore among the tasks reserved for the observatory. These principles are valid for static data, physical of chemical data, chronicles and experimentation data.

The database


It lies at the heard of the H+ organisation, and is intended to meet the goals of the observatory, that is, to allow the warehousing of a large amount of information on complex natural objects, and their utilisation towards predictive modeling.

The H+ Meetings


Regurly-held meetings between partners in H+ provide discussions on all aspects of the site development (measurements, instrumentation, experiments, database, ...), but also on basic scientific aspects, in particular the relation between data and models. The meetings are held two or three times a year.