Mahavavy River

Mahavavy River (north)
Mahavavy (north) river system
Location
CountryMadagascar
RegionDiana
CitiesManambato, Ambilobe
Physical characteristics
Sourceat the Maromokotra peak
  locationTsaratanana Massif, Diana
  elevation2,300 m (7,500 ft)
MouthIndian Ocean
  location
Antsohimbondrona, Diana
  coordinates
13°01′54″S 48°51′38″E / 13.03167°S 48.86056°E / -13.03167; 48.86056
  elevation
0 m (0 ft)
Length165 km (103 mi)
Basin size3,300 km2 (1,300 sq mi)to 3,387.1 km2 (1,307.8 sq mi)
Discharge 
  locationNear mouth
  average(Period: 1971–2000)119.9 m3/s (4,230 cu ft/s)
Basin features
Tributaries 
  leftAntsiatsia, Ambohipato
  rightAndranopato, Ankombe, Antsiatsia

The Mahavavy or Mahavavy-Nord River is a river of northern Madagascar in the region of Diana. It has its sources at the Maromokotra peak in the Tsaratanana Massif and flows north to the Indian Ocean. The main city along the river is Ambilobe at the National Road 6.

The bridge of this road had collapsed after the passage of cyclone Gamane in March 2024. In May local authorities held 2 jôro (traditional rites) hoping this will repair it but in June of the same year the road was still closed.

It crosses a fertile plain and the waters are used for the irrigation of 5500 ha, of mostly, cotton plantations. Its delta covers 500 km2.