The sources of the Nile River are the lakes and mountain springs in Ethiopia and Central Africa. The river flows north to the Mediterranean Sea. The upper Nile starts as far south as Rwanda in Africa and is known as the White Nile. It is called the White Nile because of the light colored clay that makes the water a light gray color. At Khartoum, the White Nile joins with the Blue Nile. Every summer, Lake Tana in Ethiopia floods and fed the Blue Nile. The Blue Nile got its name because of the silt that flows in it causing a blackish color. The Sudanese word for black and blue is the same, so it became known as the Blue Nile. Just below Khartoum the Nile enters the Sahara Desert and flows through Egypt.

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