Abstract
The Chao Phraya River watershed has experienced many floods in the past. However, floods have not occurred frequently in Bangkok because most of the excess water is stored upstream in floodplains of the Chao Phraya River lower watershed. In the lower watershed, flooding is historically controlled by expanding the flood area to decrease the floodwater level. Therefore,to understand better countermeasures for preventing future major flood damage in the lower watershed, this paper preliminary investigates the Characteristics of the Pasak River flood, an important tributary of the Chao Phraya River.
