evidence: The Congo River,[a] formerly also known as the Zaire River, is the second-longest river in Africa, shorter only than the Nile, as well as the third-largest river in the world by discharge volume, following the Amazon and Ganges rivers. It is the world's deepest recorded river, with measured depths of around 220 m (720 ft).[9] The Congo–Lualaba–Luvua–Luapula–Chambeshi River system has an overall length of 4,700 km (2,900 mi), which 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 is the only major river to cross the Equator twice.[10] The Congo Basin has a total area of about 4,000,000 km2 (1,500,000 sq mi), or 13% of the entire African landmass. [...] - Bibliography on Water Resources and International Law—Peace Palace Library - Map of the Congo River basin at Water Resources eAtlas - The Congo Project, American Museum of Natural History - Rivers of the Democratic Republic of the Congo - Rivers of the Republic of the Congo - Rivers of Angola - Congo River - Congo drainage basin - Angola–Democratic Republic of the Congo border - Border rivers - Congolian forests - Democratic Republic of the Congo–Republic of the Congo border - International rivers of Africa - Physiographic sections