Rianila River

Rianila River
Map of Malagasy rivers.
Location
CountryMadagascar
RegionAtsinanana
CityBrickaville
Physical characteristics
Source 
 • locationFahona Massif
 • elevation1,450 m (4,760 ft)
Mouth 
 • location
Andevoranto, Brickaville, Atsinanana
 • coordinates
18°58′35″S 49°06′10″E / 18.97639°S 49.10278°E / -18.97639; 49.10278
 • elevation
0 m (0 ft)
Length134 km (83 mi)
Basin size7,820 km2 (3,020 sq mi)
Discharge 
 • locationNear mouth
 • average(Period: 1971–2000)325.2 m3/s (11,480 cu ft/s)[1]
Basin features
River systemRianila River
Tributaries 
 • leftRongaronga
 • rightIaroka, Vohitra,

Rianila is a river in the Atsinanana region in eastern Madagascar. It flows down from the central highlands to flow into the Indian Ocean south of Brickaville at Andevoranto. Its largest tributary is the Rongaronga, which joins it near Brickaville as well as the Iaroka and Vohitra Rivers.

The river was previously called the Iharoka River by Western explorers (and the Jark River in a few sources).[2]

Inland harbour on Riaila river in Brickaville
  1. ^ "Madagascar".
  2. ^ History of Madagascar, p. 18 (1838) (example of English source, identifying it as the river just south of Andevoranto)