The White Nile, Crossing the Uganda-Sudan Border
Visible here is a part of the White Nile, north of Lake Albert. The place where the river narrows considerably marks the border between Uganda (below) and Sudan (above).
When it exits Lake Albert to the north, the White Nile is actually known as the Albert Nile. It separates the West Nile sub-region of Uganda from the rest of the nation.
The river continues north to Nimule where it enters Sudan and becomes known as the Bahr al Jabal (“River of the Mountain”, sometimes Mountain Nile). The Bahr al Jabal then winds through rapids before entering the Sudan plain and the vast swamp of the Sudd.