Congo River Congo River The great Congo River (also spelled Kongo River and known as the Zaire River; ; ; ) is the second longest river in Africa, shorter only than the Nile, as well as the second largest river in the world by discharge volume, following only the Amazon. It is also the world's deepest recorded river, with measured depths in excess of . The Congo-Lualaba-Chambeshi River system has an overall length of , 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
Blue Nile Blue Nile The Blue Nile (Ge'ez: ጥቁር ዓባይ "Ṭiqūr ʿĀbbāy" (Black Abay) to Ethiopians; ; transliterated: an-Nīl al-Azraq) is a river originating at Lake Tana in Ethiopia. With the White Nile, it is one of the two major tributaries of the Nile. The Blue Nile supplies about 80% of the water in the Nile during the rainy season. The Blue Nile is so-called because floods during the summer monsoon erode a vast amount of fertile soil from the Ethiopian Highlands and carry it downstream as silt, turning the water dark brown or almost black. The distance of the river from