1. Institute for Groundwater Management, TU Dresden Dresden Germany, Bergstr. 66, 01069.
2. NRE, Bureau de Recherches Géologiques et Minières (BRGM), University of Montpellier, 1039 Rue de Pinville Montpellier France 34000.
3. Geoscientific CentreUniversity of Göttingen, Goldschmidtstr. 3 Göttingen Germany 337077.