1. Centre of Hydrogeology and Geothermics (CHYN), University of Neuchâtel, 2000 Neuchâtel, Switzerland
2. Institute of Groundwater Ecology, Helmholtz Zentrum München, 85764 Neuherberg, Germany
3. Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland
4. BRGM, Bureau de Recherches Géologiques et Minières, 45060 Cedex 02 Orléans, France
5. Technical University of Munich, Chair of Analytical Chemistry and Water Chemistry, 81377 Munich, Germany