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THE STUDY OF FLOOD CHARACTER

The Pa-sak basin is important medium size sub-basin of Chao-Phra-Ya basin. Its drainage area is 16,292 km . Its slope is steep, so the flood flows rapidly in the rain season and damages the agricultural area.The study of flood character in Pa-sak basin is to determine the coefficient of time and coefficient of discharge by using daily runoff and rainfall data to make the unit hydrographs that describe flood character in Pa-sak basin.