1. Department of Earth Sciences Stellenbosch University Stellenbosch ZAF
2. Center for Applied Geoscience University of Tübingen Tübingen Germany
3. Institute for Modelling Hydraulic and Environmental Systems (LS3)/SimTech University of Stuttgart Stuttgart Germany
4. Swiss Federal Institute of Aquatic Science and Technology (eawag) Dübendorf Switzerland
5. Morwick G360 Groundwater Research Institute College of Engineering and Physical Sciences University of Guelph Guelph ON Canada