1. School of the Environment, Flinders University, Adelaide, GPO Box 2100, SA 5001, Australia
2. CSIRO Land and Water, Private Bag No. 5, Wembley WA 6913, Australia
3. School of Earth and Environment, The University of Western Australia, Crawley 6009, Australia
4. National Centre for Groundwater Research and Training, Flinders University, Adelaide, GPO Box 2100, SA 5001, Australia
5. Department of Geosciences, University of Bremen, 28334 Bremen, Germany
6. Department of Environmental Engineering Sciences, University of Florida, Florida 32611-2013, United States