NAME = Prof.Dr. Hansa Vathananukij ORGANIZATION = Water Resource Department, Faculty of Engineering, Kasetsart University, ADDRESS = 50 Paholyothin Rd., Jatujak, Bangkok10900 COUNTRY = Thailand PHONE = 66-2-579-1567 FAX = 66-2-579-1567 E-MAIL = fenghsv@ku.ac.th POSTER_ONLY = no THEME = T7 DATE = 30-Jul-04-16:50:14 ABSID = T7PHV30Jul04165014 TITLE = Regulated and Unregulated River Reach Perception Through Geoinformatic Public Domain Model Particularized Upon The Chaophraya Tributaries AUTHOR_1 = Prof.Dr.Hansa Vathananukij INSTITUTION_1 = Director of RM-GIS PRESENTER = AUTHOR_1 ABSTRACT = Vigorously influenced to Thai researcher, GAME-T data base has been successively produced such enormous research projects. Public domain system modeling is one of them thus were producible created under GAME-Chaophraya project. Selective basins were upon Ping river, Nan river and Pasak river which drainage areas occupied 1,500, 10,000 and 14,000 square kilometers respectively. Two of them, situated in mountainous area, were unregulated studiousness while the largest basin was regulated by Pasak Cholasit dam site. Essential data approached from GAME-T data base which were two stations at Ping river, nine stations at Nan river and eleven stations at Pasak river. Hydrologic Respond Unit (HRU) and Streamflow Hydrograph Separation and Analysis Program (HYSEP) were intensified for flood hydrograph and base flow methodology. According to model calibrations and verifications, admissible results with more than seventy percentage of correlation efficiency performed an ensuing accuracy in these appropriations. Innovative Geoinformatic-system execution could illustrate precisely synchronism with public domain model SWAT2000.