1. Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University, Giessen, Germany
2. Research Institute for Water and Energy, King Abdulaziz City for Science and Technology, Riyadh, Kingdom of Saudi Arabia
3. Water Management Group, Twente Water Centre, University of Twente, Enschede, the Netherlands
4. Centre for International Development and Environmental Research, Justus Liebig University, Giessen, Germany