[ABSTRACT] This paper discusses hydrological characteristics in the Mae Klong River Basin in Thailand. Firstly, rainfall distribution characteristics are examined by using daily rainfall data in sixteen rainfall observatories. Secondly, hydrological events of the two dam basins were qualitatively analyzed. It was found that, there was a relationship between the Western Monsoon and the rain occurrences; Si Sawat (Sri Nagarind) zone was draughtier in the Mae Klong River Basin. Si Sawat Dam Basin and Khao Laem Dam Basin, although they are close to each other (50 Km in distance), their differences concerning hydrological characteristics are high
