1. UFZ − Helmholtz Centre for Environmental Research, Department of Catchment Hydrology, Theodor-Lieser-Strasse 4, D-06120 Halle, Germany
2. Geological
Survey
of Spain (IGME) C/Ríos Rosas
23, 28003 Madrid, Spain
3. UFZ − Helmholtz Centre for Environmental Research, Department of Lake Research, Brueckstrasse 3a, D-39114 Magdeburg, Germany