1. Isotope Hydrology Section, Sri Lanka Atomic Energy Board (SLAEB) Wellampitiya, Sri Lanka
2. International Water Management Institute (IWMI), Battaramulla, Sri Lanka
3. Department of Geology, Faculty of Science, University of Peradeniya, Peradeniya, Sri Lanka
4. Department of Physics, Faculty of Science, University of Peradeniya, Peradeniya, Sri Lanka