Geoinformatic Public Domain System Model “ SWAT “ in Thailand

Abstract

The Chaophraya river basin has been supremely presumed to regime characterize central plain area. Prototype domains were researched with the SWAT model on medium and huge areas of both unregulated and regulated reaches upon steep slope, hilly and plain features on the Chaophraya tributaries in northern Thailand. 1,500 and 10,200 sq. kilometers domains situated in mountainous feature were unregulated studiousness, the other largest research domain of 14,500 sq.kilometers was regulated by Pasak Cholasit reservoir. Essential hydrological data inquiry was two stations at Ping river, nine stations at Nan river and eleven stations at Pasak river. 1:50,000 geoinformatic system was much conveniently spatial analyzed for federation and assessment. Base flow severance was stream flow hydrograph separation and analysis program was assembled by sliding interval methodology. Data analysis interface was modified by data analysis programming and data access methodology was approached by basic standard query language. This appropriate model calibrations and verifications, admissible ensued on above ninety percentage of correlation efficiency and affirmable best arbitrated on large scale-mild slope potentiality together with un-implied in both continual rainfall investigation and sufficient number of stations.