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 | |
| Country | Indonesia |
| Physical characteristics | |
| Source | Ombilin River, Sinamar River |
| • location | West Sumatra |
| Mouth | Strait of Malacca |
• location | Riau |
| Length | 500 km (310 mi) |
| Basin size | 17,968 km2 (6,937 sq mi) |
| Discharge | |
| • location | Indragiri Delta, Malacca Strait |
| • average | (Period of data: 2009-2013)1,339 m3/s (47,300 cu ft/s) |
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]
References
- Batang Indragiri at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27
- 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.
- Maatschappij-Belangen, 1875.
- 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.
- "NASA Earth Observations Data Set Index". NASA. 30 January 2016. Archived from the original on 11 May 2020. Retrieved 10 January 2019.
- "NASA Earth Observations: Rainfall (1 month - TRMM)". NASA/Tropical Rainfall Monitoring Mission. 30 January 2016. Archived from the original on 19 April 2019. Retrieved 10 January 2019.