The Nile is a major north-flowing river in northeastern Africa. The
longest river in Africa, it has historically been considered the
longest river in the world, though this has been contested by
research suggesting that the Amazon River is slightly longer. The
Nile is about 6,650 km (4,130 mi) long and its drainage basin covers
eleven countries: Tanzania, Uganda, Rwanda, Burundi, the Democratic
Republic of the Congo, Kenya, Ethiopia, Eritrea, South Sudan,
Republic of the Sudan, and Egypt. In particular, the Nile is the
primary water source of Egypt and Sudan. The Nile has two major
tributaries – the White Nile and the Blue Nile. The White Nile is
considered to be the headwaters and primary stream of the Nile
itself. The Blue Nile, however, is the source of most of the water,
containing 80% of the water and silt. The White Nile is longer and
rises in the Great Lakes region of central Africa, with the most
distant source still undetermined but located in either Rwanda or
Burundi. It flows north through Tanzania, Lake Victoria, Uganda and
South Sudan. The Blue Nile begins at Lake Tana in Ethiopia and flows
into Sudan from the southeast. The two rivers meet just north of the
Sudanese capital of Khartoum.
**Source: Wikipedia