section_path: Tributaries/Bahr el Ghazal and Sobat River
section_name: Bahr el Ghazal and Sobat River
paragraph_text: Bahr el Ghazal and Sobat River
  
  The Bahr al Ghazal and the Sobat River are the two most important tributaries of the White Nile in terms of discharge.
  
  The Bahr al Ghazal's drainage basin is the largest of any of the Nile's sub-basins, measuring 520,000 square kilometers (200,000 sq mi) in size, but it contributes a relatively small amount of water, about 2 m /s (71 cu ft/s) annually, because tremendous volumes of water are lost in the Sudd wetlands.
  
  The Sobat River, which joins the Nile a short distance below Lake No, drains about half as much land, 225,000 km (86,900 sq mi), but contributes 412 cubic meters per second (14,500 cu ft/s) annually to the Nile. When in flood the Sobat carries a large amount of sediment, adding greatly to the White Nile's color.