1. Institute of Applied Geosciences, Technische Universität Darmstadt, Darmstadt 64287, Germany
2. Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, Barcelona 08034, Spain
3. Hydrogeology Group (UPC−CSIC), Barcelona 08034, Spain
4. Institute for Atmospheric and Environmental Sciences, Goethe-University Frankfurt, Frankfurt am Main 60438, Germany
5. Water Resources Management Division, IWW Water Centre, Mülheim an der Ruhr 45476, Germany