*Angela Ruth Welham¹, Jared van Rooyen^1,2,3, Andrew Watson⁴, Alakendra Roychoudhury¹, Reynold Chow^5,1 (1.Department of Earth Sciences, Stellenbosch University, Western Cape, South Africa, 2.Swiss Federal Institute of Aquatic Science and Technology (Eawag), 8600 Dübendorf, Switzerland, 3.Hydrogeology, Department of Environmental Sciences, University of Basel - Basel, Switzerland, 4.School for Climate Studies, Stellenbosch University, Western Cape, South Africa, 5.Soil Physics and Land Management Group, Wageningen University, the Netherlands)