Sobat River

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Sobat River
Sobat River from air
Country South Sudan
State Upper Nile (state)
Source Pibor River and Baro River confluence
 - coordinates 8°26′10″N 33°13′7″E / 8.43611°N 33.21861°E / 8.43611; 33.21861
Mouth White Nile
 - coordinates 9°22′2″N 31°32′57″E / 9.36722°N 31.54917°E / 9.36722; 31.54917Coordinates: 9°22′2″N 31°32′57″E / 9.36722°N 31.54917°E / 9.36722; 31.54917
Length 354 km (220 mi) [1]
Basin 225,000 km2 (86,873 sq mi)
Discharge for Hillet Doleib
 - average 412 m3/s (14,550 cu ft/s)
 - max 680 m3/s (24,014 cu ft/s)
 - min 99 m3/s (3,496 cu ft/s)

The Sobat River is a river of the Greater Upper Nile region in northeastern South Sudan, Africa. It is the most southerly of the great eastern tributaries of the White Nile, before the confluence with the Blue Nile.


The Sobat River is formed by the confluence of the west-flowing Baro River and the north-flowing Pibor River, on the border with Ethiopia. The river enters the White Nile at Doleib Hill, near the city of Malakal in Upper Nile State.

When in flood the Sobat River produces an enormous discharge carrying a white sediment, which gives the White Nile its name.[1](registration required)


The Sobat and its tributaries drain a watershed approximately 225,000 km2 (87,000 sq mi) in size. The river's mean annual discharge is 412 m³/s (14,550 ft³/s).[2]

See also[edit]


  1. ^ a b "Sobat River". Encyclopædia Britannica Online Library Edition. Encyclopædia Britannica. Retrieved 2008-01-21.
  2. ^ Shahin, Mamdouh (2002). Hydrology and Water Resources of Africa. Springer. pp. 276, 288. ISBN 1-4020-0866-X.; online at Google Books

External links[edit]