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Stream

Mangoky River

564 km from source to mouth · Madagascar.

MadagascarMadagascarFlows into Mozambique Channel2nd longest in Madagascar

Follow the riverMonth by month

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

In numbers

Length

564km

Average flow

430m³/s

Basin

55,750km²

Drop

1,022m

from 1,022 m to 0 m

Country

1

The journey

From source to mouth

564 km of river and 2 stops on the way: 1 towns and cities on its banks, dams, bridges and the tributaries that feed it.

1,022 m0 m
Sourceat 1,022 m0 km
Zomandao Rivertributary274 km
Beroroha18,632 people312 km
Mozambique Channelat 0 m564 km
0200400564 km
  1. 0 kmSourceat 1,022 m
  2. 274 kmZomandao Rivertributary
  3. 312 kmBeroroha18,632 people
  4. 564 kmMozambique Channelat 0 m

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

River in Madagascar

At the mouth it carries 433 m³/s on average: an Olympic pool every 5.8 seconds. It drops from 1,022 m to 0 m, 1.8 m per kilometre on average. Its basin covers 55,750 km², about the size of HR. 1.5 million people live in it. Highest water: February; lowest: from June 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

Mangoky River, month by month

Highest water: February

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

1,000
27°248 mmJan
1,200
26°194 mmFeb
1,000
26°136 mmMar
560
25°24 mmApr
260
22°10 mmMay
95
20°7 mmJun
84
20°5 mmJul
83
21°6 mmAug
84
23°10 mmSep
99
25°27 mmOct
190
26°78 mmNov
570
27°202 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 83 m³/s in the lowest month to 1,200 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

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

Mangoky River: the basin in numbers

54,934 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.
  • 1.5millionpeople live in the basin
  • 27/km²people per km²
  • 726maverage altitude of the basin
  • 972mmof rain a year (basin average)
  • 22.1°Caverage air temperature
  • 1%protected areas
  • 0.1%covered by lakes

What covers the basin

  • 7% Forest
  • 7% Cropland
  • 55% 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

Mangoky River: what you find on the way

  • 1DamsPrise de Bevoay
  • 1Waterfalls
  • 8Ferry piers

From OpenStreetMap, within 2.2 km of the river. Not mapped is not the same as not there.

From space

The source and the mouth, seen from orbit

Mangoky River: satellite view of the source
The source14 km across
Mangoky River: satellite view of the mouth
The mouth32 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

Mangoky River in pictures

Hovercraft on Mangoky
MissPlumb · Public domain
Station du Bas Mangoky. Le fleuve Mangoky . Vue des pépinières de la Station. Madagascar - btv1b10120224x (2 of 2)
Unknown author · Public domain
Voitures ayant traversé le fleuve Mangoky à Madagascar
LeFnake · CC BY-SA 4.0
Station du Bas Mangoky. Le fleuve Mangoky . Vue des pépinières de la Station. Madagascar - btv1b10120224x (1 of 2)
Unknown author · Public domain

Tributaries

Where it flows, and what flows into it

Tributaries (1)

Also: Zomandao River

Where these numbers come from

Name, length, placesWikidata (Q1288223) · 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.

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