The Bassac River is a distributary of the Tonlé Sap and Mekong River. The river starts in Phnom Penh, Cambodia, and flows southerly, crossing the border into Vietnam near Châu Đốc. The name Bassac comes from the Khmer prefix “pa” added to sak, a Khmer word borrowed from the Sanskrit “sakti”.
In Vietnam it is known as the Hậu River.
The Bassac River is an important transportation corridor between Cambodia and Vietnam, with barges and other craft plying the waters. A city of the same name was once the west-bank capital of the Kingdom of Champasak.
Wikipedia https://en.wikipedia.org/wiki/Bassac_River
Address Vietnam
Coordinates 10°10'50.563" N 105°38'47.338" E