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River

Oum Er-Rbia River

556 km from source to mouth · Morocco.

MoroccoMoroccoFlows into Atlantic Ocean2nd longest in Morocco

Follow the riverMonth by month

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

In numbers

Length

556km

Average flow

120m³/s

Basin

35,000km²

Drop

1,262m

from 1,262 m to 0 m

Country

1

The journey

From source to mouth

556 km of river and 12 stops on the way: 9 towns and cities on its banks, dams, bridges and the tributaries that feed it.

1,262 m0 m
Moyen Atlasat 1,262 m0 km
Khenifra123,738 people47 km
Kasba Tadla48,172 people146 km
Souq Al Had Bradya9,080 people190 km
El-Abid Rivertributary269 km
Oued Tessaouttributary301 km
Sidi Saïd Maâchou497 km
Atlantic Oceanat 0 m556 km
0200400556 km
  1. 0 kmMoyen Atlasat 1,262 m
  2. 5 kmOum Rabia7,821 people
  3. 47 kmKhenifra123,738 people
  4. 97 kmZawyat ech Cheïkh27,723 people
  5. 146 kmKasba Tadla48,172 people
  6. 190 kmSouq Al Had Bradya9,080 people
  7. 245 kmDar Oulad Zidouh30,114 people
  8. 246 kmDar Ould Zidouh12,547 people
  9. 269 kmEl-Abid Rivertributary
  10. 301 kmOued Tessaouttributary
  11. 497 kmSidi Saïd Maâchou
  12. 536 kmSidi Ali Ben Hamdouche9,463 people
  13. 536 kmAzemmour42,098 people
  14. 556 kmAtlantic Oceanat 0 m

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

River in Morocco

At the mouth it carries 117 m³/s on average: an Olympic pool every 21 seconds. It drops from 1,262 m to 0 m, 2.3 m per kilometre on average. Its basin covers 35,000 km², about the size of TW. 3.2 million people live in it. Highest water: from December to February; lowest: from July to October. It is heavily dammed: reservoirs can hold 187% of a year's flow.

Read more on Wikipedia

Where to start

  • KhenifraLargest city on its banks · 123,738 people
  • Beni Mellal Airport (BEM)Nearest airport with scheduled flights, 85 km from the cityCar hire at FEZ airport (Saïss)Discover Cars · Affiliate link
  • On the water1 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
  • From April to June and from September to OctoberThe best months to visit

Oum Er-Rbia River, month by month

Highest water: from December to February

Lowest water: from July to October. Best months to visit: from April to June and from September to October.

200
11°50 mmJan
200
12°58 mmFeb
180
14°60 mmMar
150
16°48 mmApr
99
19°24 mmMay
48
23°8 mmJun
18
26°1 mmJul
11
27°2 mmAug
12
24°9 mmSep
37
20°37 mmOct
110
15°63 mmNov
190
12°71 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 11 m³/s in the lowest month to 200 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 FEZ airport (Saïss)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

Oum Er-Rbia River: the basin in numbers

35,398 km² of land send their water to this river. This is what lives on it.

DammedReservoirs can hold 187% of a year's flow: much of the river is a chain of lakes.
  • 3.2millionpeople live in the basin
  • 91/km²people per km²
  • 1,072maverage altitude of the basin
  • 476mmof rain a year (basin average)
  • 15.7°Caverage air temperature
  • 10%protected areas
  • 0.3%covered by lakes
  • 4.8km³held in reservoirs

What covers the basin

  • 6% Forest
  • 52% Cropland
  • 37% Pasture
  • 2% 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

Oum Er-Rbia River: what you find on the way

  • 9DamsAl Massira Dam, Barrage d'Imfout, Barrage Daourat and 6 more
  • 3WaterfallsCascade des Sources Oum Rabia, Cascade Saghourat Doukkala, Cascade Daoura
  • 1MarinasLbir Skhoun Olad Zmam

From OpenStreetMap, within 2.1 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Oum Er-Rbia 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.

  • 3beaches at the mouth and on the banksCoastya
  • 26mountains at the sourcePeakyas

Beaches (3)

At the mouth (25 km) and on the banks, by Coastya

  1. Plage de Hawziya1.5 km away22.9°C
  2. Rade de Mazagan14 km away · cove22.9°C
  3. Crique de Sidi Bou Zid23 km away · cove22.5°C

Open Coastya ↗

Mountains at the source (26)

Within 15 km of the source, by Peakyas

  1. Mimejad12 km away
  2. Koudia Mirssa15 km away
  3. Tissoufra8.5 km away
  4. Tit Ifestene13 km away
  5. Tichout n' Tizi n'Taleb14 km away
  6. Tatlalet3.1 km away
  7. Tidouchnine11 km away
  8. Ounane11 km away

18 more on PeakyasOpen Peakyas ↗

From space

The source and the mouth, seen from orbit

Oum Er-Rbia River: satellite view of the source
The source14 km across
Oum Er-Rbia River: satellite view of the mouth
The mouth26 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

Oum Er-Rbia River in pictures

تدفق مياه أم الربيع
Anas Souir · CC BY-SA 4.0
Azemmour from Oum Er-Rbia
Yaroslav Blanter · CC BY-SA 3.0
Azemmour embouchure Oum Errabiaâ-photo Bertrand SOUBEYRAND
Bertrand SOUBEYRAND · CC BY-SA 4.0
Flooding of the Oum Er-Rbia River (Assaka Neighborhood) in the city of Khenifra, Morocco
Said.ahmami · CC0

Tributaries

Where it flows, and what flows into it

Tributaries (2)

Also: El-Abid River, Oued Tessaout

Nearby

Rivers nearby

Bou RegregMoroccoMorocco240 km23 m³/s161 km awaySebou RiverMoroccoMorocco458 km140 m³/s189 km awayTensift RiverMoroccoMorocco270 km61 m³/s170 km awayLoukkos RiverMoroccoMorocco176 km50 m³/s292 km awayGuadalquivirSpainSpain657 km160 m³/s428 km awayGuadianaPortugalPortugal778 km70 m³/s439 km awayGuadaleteSpainSpain159 km20 m³/s412 km awayTinto RiverSpainSpain100 km14 m³/s454 km away

Where these numbers come from

Name, length, placesWikidata (Q1778840) · 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 atlasesCoastya, Peakyas — 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