1. Post Graduate (Research), School of the Environment (Earth Sciences), Flinders Univ., GPO Box 2100, Adelaide 5001, South Australia (corresponding author).
2. Director and Professor, National Centre for Groundwater Research and Training, Flinders Univ., GPO Box 2100, Adelaide 5001, South Australia.
3. Senior Lecturer in Hydrology, School of the Environment (Earth Sciences), Flinders Univ., GPO Box 2100, Adelaide 5001, South Australia.