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River

Omo River

760 km from source to mouth · Ethiopia.

EthiopiaEthiopiaFlows into Lake Turkana3rd longest in EthiopiaUNESCO World Heritage

Follow the riverMonth by month

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

In numbers

Length

760km

Average flow

900m³/s

Basin

70,420km²

Drop

745m

from 1,106 m to 361 m

Country

1

The journey

From source to mouth

760 km of river and 9 stops on the way: 0 towns and cities on its banks, dams, bridges and the tributaries that feed it.

1,106 m361 m
Gibe Riverat 1,106 m0 km
Gojeb Rivertributary112 km
Zigina Rivertributary277 km
Denchya Rivertributary326 km
Mui Rivertributary426 km
Usno Rivertributary556 km
Dīp'a Hāyk'2.0 km²597 km
Lake Turkanaat 361 m760 km
0200400600760 km
  1. 0 kmGibe Riverat 1,106 m
  2. 0 kmGibe Rivertributary
  3. 18 kmWabe Rivertributary
  4. 112 kmGojeb Rivertributary
  5. 188 kmGilgel Gibe III Dam
  6. 277 kmZigina Rivertributary
  7. 326 kmDenchya Rivertributary
  8. 426 kmMui Rivertributary
  9. 556 kmUsno Rivertributary
  10. 597 kmDīp'a Hāyk'2.0 km²
  11. 760 kmLake Turkanaat 361 m

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

River in Ethiopia

At the mouth it carries 902 m³/s on average: an Olympic pool every 2.8 seconds. It drops from 1,106 m to 361 m, 1.0 m per kilometre on average. Its basin covers 70,420 km², about the size of IE. 10.2 million people live in it. Highest water: from June to September; lowest: from December to March. No large dam holds it back: it is one of the world's free-flowing rivers.

Read more on Wikipedia

Where to start

  • LobuniLargest city on its banks · 3,363 people
  • Jinka Airport (BCO)Nearest airport with scheduled flights, 114 km from the city
  • On the water2 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
  • From September to JanuaryThe best months to visit

Omo River, month by month

Highest water: from June to September

Lowest water: from December to March. Best months to visit: from September to January.

280
26°20 mmJan
150
27°31 mmFeb
490
27°67 mmMar
1,300
26°107 mmApr
2,000
26°114 mmMay
2,100
25°92 mmJun
2,300
25°116 mmJul
2,300
24°106 mmAug
2,100
25°83 mmSep
1,500
25°62 mmOct
1,000
25°55 mmNov
560
25°22 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 150 m³/s in the lowest month to 2,300 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

Omo River: the basin in numbers

70,420 km² of land send their water to this river. This is what lives on it.

Free-flowingDams upstream can hold only 0.0% of a year's flow: the river still keeps its natural rhythm.
  • 10.2millionpeople live in the basin
  • 145/km²people per km²
  • 1,523maverage altitude of the basin
  • 1,301mmof rain a year (basin average)
  • 21.0°Caverage air temperature
  • 20%protected areas

What covers the basin

  • 14% Forest
  • 9% Cropland
  • 7% Pasture
  • 4% Towns and cities

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

Omo River: what you find on the way

  • 4DamsGilgel Gibe III Dam, Koysha dam, Spillway Sluice Gates and 1 more
  • 3Weirs
  • 2Ferry piersOmorate Ferry Crossing (Brr 150 Per Person), Omorate boat crossing

From OpenStreetMap, within 2.3 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Omo River in our other atlases

What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.

  • 1lake on its wayLakeyas

Lakes and reservoirs (1)

Lakes it flows through, by Lakeyas

  1. Dīp'a Hāyk'km 6982.0km²

Lakeyas is coming soonOpen Lakeyas ↗

From space

The source and the mouth, seen from orbit

Omo River: satellite view of the source
The source14 km across
Omo River: satellite view of the mouth
The mouth36 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.

Photos

Omo River in pictures

Lower Valley of the Omo-138523
Karalyn Monteil · CC BY-SA 3.0 igo
Omo River 02
Bernard Gagnon · CC BY-SA 3.0

Tributaries

Where it flows, and what flows into it

Tributaries (8)

Also: Gibe River, Gojeb River, Wabe River, Usno River, Denchya River, Mui River, Zigina River, Mantsa River

Where these numbers come from

Name, length, placesWikidata (Q273456) · 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
Our other atlasesLakeyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST

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.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
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