The thesis use data ,From study analyzed the daily rainfall data of the APHRODITE's Water Resources data current version V1101resolution of (not point ทวินตี้ไฟท์ degree บาย not point ทวินตี้ไฟท์ degree)0.25°x0.25° latitude and longitude over Monsoon Asia in orange frame (APHRO_MA_V1101) for 1951 to 2007. We have used the rainfall data over Thailand. the figure show Domain of the current products APHRO_MA/ME/RU_V1101 and APHRO_JP_V1005. Red, black and blue dots show stations corresponding to original rain-gauge data individually collected from local organizations, derived from precompiled datasets, and derived from global telecommunication system reports, respectively.