Congo River
…makes it the world's ninth-longest river. The Chambeshi is a tributary of the Lualaba River, and Lualaba is the name of the Congo River upstream of Boyoma Falls, extending for 1,800 km (1,100 mi). Measured along with the Lualaba, the main tributary, the Congo River has a total length of 4,370 km (2,720 mi). It…