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River

Sobat River

306 km from source to mouth · South Sudan.

South SudanSouth SudanFlows into White Nile3rd longest in South Sudan

Follow the riverMonth by month

SourceMouth
The river and every tributary in its basin, drawn from RiverATLAS (CC BY 4.0).

In numbers

Length

306km

Average flow

410m³/s

Basin

225,000km²

Drop

9m

from 403 m to 394 m

Country

1

The journey

From source to mouth

306 km of river and 2 stops on the way: 0 towns and cities on its banks, dams, bridges and the tributaries that feed it.

444 m394 m
Sourceat 403 m0 km
White Nileat 394 m306 km
0100200306 km
  1. 0 kmSourceat 403 m
  2. 9 kmPibor Rivertributary
  3. 9 kmBaro Rivertributary
  4. 306 kmWhite Nileat 394 m

Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.

River in South Sudan

At the mouth it carries 412 m³/s on average: an Olympic pool every 6.1 seconds. Its basin covers 225,000 km², about the size of GY. 6.0 million people live in it. Highest water: from August to September; lowest: from January to April. No large dam holds it back: it is one of the world's free-flowing rivers.

Read more on Wikipedia

Where to start

  • MalakalLargest city on its banks · 160,765 people
  • Malakal International Airport (MAK)Nearest airport with scheduled flights, 3 km from the city
  • From November to JanuaryThe best months to visit

Sobat River, month by month

Highest water: from August to September

Lowest water: from January to April. Best months to visit: from November to January.

66
27°0 mmJan
30
29°1 mmFeb
30
30°9 mmMar
41
30°31 mmApr
120
28°95 mmMay
240
27°118 mmJun
400
26°153 mmJul
590
26°182 mmAug
640
27°133 mmSep
550
28°70 mmOct
370
28°8 mmNov
180
27°0 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 30 m³/s in the lowest month to 640 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.

Plan the trip

Plan the trip: boat trips, a bed by the river, a car

Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.

The basin

Sobat River: the basin in numbers

214,881 km² of land send their water to this river. This is what lives on it.

Free-flowingDams upstream can hold only 0.7% of a year's flow: the river still keeps its natural rhythm.
  • 6.0millionpeople live in the basin
  • 28/km²people per km²
  • 716maverage altitude of the basin
  • 1,024mmof rain a year (basin average)
  • 25.6°Caverage air temperature
  • 25%protected areas
  • 0.1km³held in reservoirs

What covers the basin

  • 17% Forest
  • 6% Cropland
  • 40% Pasture

RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.

Along the river

Sobat River: what you find on the way

  • 1River beachesWadh Nyachar/Wadh Wäär Joguol

From OpenStreetMap, within 2.6 km of the river. Not mapped is not the same as not there.

From space

The source and the mouth, seen from orbit

Sobat River: satellite view of the source
The source14 km across
Sobat River: satellite view of the mouth
The mouth63 km across

Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.

Where these numbers come from

Name, length, placesWikidata (Q821911) · CC0
Course, profile, basinRiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata
FlowWaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0
Climate along the riverWorldClim (RiverATLAS), 1970–2000 · CC BY 4.0
Towns, bridges, damsWikidata · CC0; GeoNames · CC BY 4.0
Along the river© OpenStreetMap contributors · ODbL
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons

Every source and licence is on the data sources page.

The family

Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?

Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.

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mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.You are here
canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit