1. Department of Geophysics Kyoto University Kyoto Japan
2. Research and Innovation Center Institute of Technology of Cambodia Phnom Penh Cambodia
3. Faculty of Hydrology and Water Resource Engineering Institute of Technology of Cambodia Phnom Penh Cambodia
4. General Department of Science, Technology & Innovation Ministry of Industry, Science, Technology & Innovation Phnom Penh Cambodia
5. Institute for Liberal Arts and Sciences Kyoto University Kyoto Japan