Salween River much of its length, the Salween's course is nearly parallel to that of the much larger Mekong in the east. Although the commonly accepted name is Salween, the river is known by a handful of other names regionally: "Nu" in China, "Thanlwin" in southern Burma, and "Salawin" on the border of Thailand and Burma. Several major sub-continental drainage basins border on the Salween. The Mekong basin forms nearly the entire eastern boundary of the watershed, while the Irrawaddy River flows southwards on the west side of the basin. The smallest boundary is formed by the Yangtze to the extreme north.
Suárez River horse drowned in the river when it experienced sudden flooding. The original name in Chibcha, given by the Guane was "Saravita", meaning "departs from here". The Suárez River is long and its drainage basin extends over , of which in Santander. It is sourced by Lake Fúquene in Boyacá at an altitude of and forms together with the Chicamocha River the Sogamoso River in Santander at an altitude of . The river starts on the Altiplano Cundiboyacense where it forms the boundary between Cundinamarca and Boyacá and for a major part of its course downstream it is the natural boundary