1. Institute of Industrial Science, University of Tokyo; Tokyo Japan
2. National Institute for Environmental Stud, ies; Tsukuba Japan
3. Urban Environment and Environmental Geography, Tohoku University; Tohoku Japan
4. Water Resources Research Center, D.P.R.I., Kyoto University; Kyoto Japan
5. Royal Irrigation Department; Thailand
6. Department of Integrated Climate Change Projection Research; Japan Agency for Marine-Earth Science and Technology; Kanagawa Japan