Booncherm, et al., (2001) Studied Sea surface residual flow and water circulation in the Gulf of Thailand using data from oceanographic buoys. He analyzed the data from the upper gulf during 1996 and 1998 and the data from the lower guduring 1993 and 1994. The data indicated that the magnitude of the net surface residual current in the gulf was approximately 5 cm/s. In the upper gulf, it had a lower value of 3 cm/s with unpredicted direction pattern. During the NE monsoon, the net surface residual current was large and the pattern of the water circulation in the gulf was counter-clockwise, whereas during the SW monsoon, the residual current was small with a clockwise circulation pattern.