1. Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Tokyo, Japan
2. Faculty of Hydrology and Water Resources Engineering, Institute of Technology of Cambodia, Phnom Penh, Cambodia
3. Faculty of Agriculture, Yamagata University, Yamagata, Japan
4. Department of Global Engineering for Development, Environment and Society, Tokyo Institute of Technology, Yokohama, Japan
5. Civil and Environmental Research Center, Universidad Privada Bolivia, Cochabamba, Bolivia