Indragiri River

The Indragiri River is a river in Sumatra, in the Indonesian province of Riau, Indonesia, about 800 km northwest of the capital Jakarta.[1][2] It is formed from the union of the Ombilin River and the Sinamar River, and empties into the Strait of Malacca. The middle part that flows in the Kuantan Singingi Regency is called Batang Kuantan (Kuantan River).[3]

Indragiri River
Kuantan River, Batang Indragiri, Sungai Indragiri, Soengai Inderagiri, Batang Inderagiri, Batang Kuantan, Batang Koeantan, Sungai Kuatan, Koentan, Sungai Batangkuantan
Map of the Rokan and Indragiri (right) rivers by Isaak de Graaf, circa 1690-1743.
Location of river mouth
Indragiri River (Indonesia)
Location
CountryIndonesia
Physical characteristics
SourceOmbilin River, Sinamar River
 • locationWest Sumatra
MouthStrait of Malacca
 • location
Riau

Geography

The river flows in the eastern area of Sumatra with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).[4] The annual average temperature in the area is 23 °C. The warmest month is February, when the average temperature is around 24 °C, and the coldest is August, at 22 °C.[5] The average annual rainfall is 2757 mm. The wettest month is November, with an average of 345 mm rainfall, and the driest is January, with 107 mm rainfall.[6]

See also

References
  1. Batang Indragiri at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27
  2. Kosuke Mizuno, Motoko S. Fujita & Shuichi Kawai (2016). Catastrophe and Regeneration in Indonesia's Peatlands: Ecology, Economy and Society. NUS Press. p. 166. ISBN 978-98-147-2209-4.
  3. Maatschappij-Belangen, 1875.
  4. Peel, M C; Finlayson, B L; McMahon, T A (2007). "Updated world map of the Köppen-Geiger climate classification". Hydrology and Earth System Sciences. 11 (5): 1633–1644. Bibcode:2007HESS...11.1633P. doi:10.5194/hess-11-1633-2007. Retrieved 30 January 2016.
  5. "NASA Earth Observations Data Set Index". NASA. 30 January 2016.
  6. "NASA Earth Observations: Rainfall (1 month - TRMM)". NASA/Tropical Rainfall Monitoring Mission. 30 January 2016.

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