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River

Utamboni River

141 km from source to mouth · Equatorial Guinea.

Equatorial GuineaEquatorial Guinea3rd longest in Equatorial Guinea

Follow the riverMonth by month

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

In numbers

Length

141km

Average flow

340m³/s

Basin

6,333km²

Drop

592m

from 598 m to 6 m

Country

1

The journey

From source to mouth

141 km of river and 4 stops on the way: 0 towns and cities on its banks, dams, bridges and the tributaries that feed it.

598 m6 m
Sourceat 598 m0 km
Cascada Minguo61 km
Cascada Cuakigui72 km
Cascada Enue96 km
Mouthat 6 m141 km
050100141 km
  1. 0 kmSourceat 598 m
  2. 61 kmCascada Minguo
  3. 72 kmCascada Cuakigui
  4. 73 kmCascada Alar
  5. 96 kmCascada Enue
  6. 141 kmMouthat 6 m

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

River in Equatorial Guinea

At the mouth it carries 342 m³/s on average: an Olympic pool every 7.3 seconds. It drops from 598 m to 6 m, 4.2 m per kilometre on average. Its basin covers 6,333 km², about the size of PS. 46,000 people live in it. Highest water: from November to December; lowest: from July to September. No large dam holds it back: it is one of the world's free-flowing rivers.

Read more on Wikipedia

Where to start

Utamboni River, month by month

Highest water: from November to December

Lowest water: from July to September. Best months to visit: from June to August.

440
25°165 mmJan
350
25°199 mmFeb
410
25°277 mmMar
490
25°293 mmApr
530
25°271 mmMay
370
24°70 mmJun
210
22°9 mmJul
99
23°24 mmAug
210
24°208 mmSep
520
24°455 mmOct
700
24°376 mmNov
640
25°205 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 99 m³/s in the lowest month to 700 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

Car hire at LBV airport (Libreville)Discover CarsSee 

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

Utamboni River: the basin in numbers

6,333 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.
  • 46,000people live in the basin
  • 7/km²people per km²
  • 370maverage altitude of the basin
  • 2,526mmof rain a year (basin average)
  • 23.8°Caverage air temperature
  • 11%protected areas

What covers the basin

  • 96% Forest
  • 2% Cropland

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

Cross-checked with our atlases

Utamboni 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.

  • 4waterfalls on the riverCascadyas

Waterfalls (4)

On the river, by Cascadyas

  1. Cascada Minguokm 61
  2. Cascada Cuakiguikm 72
  3. Cascada Alarkm 73
  4. Cascada Enuekm 96

Cascadyas is coming soonOpen Cascadyas ↗

From space

The source and the mouth, seen from orbit

Utamboni River: satellite view of the source
The source14 km across
Utamboni River: satellite view of the mouth
The mouth11 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.

Nearby

Rivers nearby

Benito RiverEquatorial GuineaEquatorial Guinea365 km510 m³/s65 km awayCampo RiverEquatorial GuineaEquatorial Guinea460 km720 m³/s149 km awayOgooué RiverGabonGabon850 km4,800 m³/s244 km awaySanagaCameroonCameroon918 km2,100 m³/s283 km awayNyong RiverCameroonCameroon640 km450 m³/s251 km awayIvindo RiverGabonGabon500 km780 m³/s294 km awayWouri RiverCameroonCameroon160 km620 m³/s340 km awayMbam RiverCameroonCameroon425 km710 m³/s412 km away

Where these numbers come from

Name, length, placesWikidata (Q4783441) · CC0
Course, profile, basinRiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed along the river network from the point 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 atlasesCascadyas — 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