1. Department of Hydrogeology, UFZ‐Helmholtz Centre for Environmental Research Leipzig Germany
2. Now at GEOMAR Helmholtz Centre for Ocean Research Kiel Kiel Germany
3. Department of Catchment Hydrology, UFZ‐Helmholtz Centre for Environmental Research Halle Germany
4. The Research Council Seeb Oman
5. Ministry of Regional Municipalities and Water Resources Salalah Oman
6. Institute of Applied Geosciences Technische Universität Darmstadt Darmstadt Germany