Sobat River
Sobat River from air
Location
Country	South Sudan
State	Jonglei, Upper Nile (state)
Physical characteristics
Source	Baro River
• location	Dibdib, Ethiopia
• coordinates	7°42′04″N 35°52′44″E / 7.701°N 35.879°E / 7.701; 35.879
• elevation	2,367 m (7,766 ft)
2nd source	Pibor River
• location	Pibor Post, Greater Pibor
• coordinates	6°47′42″N 33°09′07″E / 6.7951°N 33.1519°E / 6.7951; 33.1519
• elevation	418 m (1,371 ft)
Source confluence
• location	Ajungmir, Jonglei
• coordinates	8°26′10″N 33°13′7″E / 8.43611°N 33.21861°E / 8.43611; 33.21861
• elevation	404 m (1,325 ft)
Mouth	White Nile
• location	Againg, Upper Nile
• coordinates	9°22′2″N 31°32′57″E / 9.36722°N 31.54917°E / 9.36722; 31.54917
• elevation	398 m (1,306 ft)
Length	354 km (220 mi)[1]
Basin size	225,000 km2 (87,000 sq mi)
Discharge
• location	Hillet Doleib
• average	412 m3/s (14,500 cu ft/s)
• minimum	99 m3/s (3,500 cu ft/s)
• maximum	680 m3/s (24,000 cu ft/s)
Discharge
• location	mouth
• average	437 m3/s (15,400 cu ft/s)
Basin features
Progression	White Nile → Nile → Mediterranean Sea
River system	Nile

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.

Geography

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]

Hydrology

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]