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Rokan River Sungai Rokan, Soengai Rekan
Map of the Rokan (left) and Indragiri rivers by Isaak de Graaf, circa 1690-1743.
Location of river mouthShow map of SumatraRokan River (Indonesia)Show map of Indonesia
Location
Country	Indonesia
Province	Riau
Physical characteristics
Source
• location	Barisan Mountains
Mouth
• location	Malacca Strait
Length	350 km (220 mi)
Basin size	19,258 km (7,436 sq mi)
Discharge
• location	Rokan Delta, Bagansiapiapi, Malacca Strait
• average	(Period of data: 2009–2013)1,506 m/s (53,200 cu ft/s)
Basin features
Tributaries
• left	Rokan-kanan River
• right	Rokan-kiri River

Rokan River is a river in Riau province, central-eastern Sumatra, Indonesia, about 1,100 km northwest of the capital Jakarta.

Hydrology

The river originates in the Barisan Mountains in the west, and drains northeast-ward along Rokan Hulu Regency and Rokan Hilir Regency with estuarine located near the port town of Bagansiapiapi draining the water to Malacca Strait.

Tributaries include the Rokan-kiri River, Rokan-kanan River, Kumu River.

Geography

The river flows in the central area of Sumatra with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification). The annual average temperature in the area is 23 °C. The warmest month is March, when the average temperature is around 24 °C, and the coldest is January, at 22 °C. The average annual rainfall is 3766 mm. The wettest month is November, with an average of 336 mm rainfall, and the driest is July, with 113 mm rainfall.

See also

• List of drainage basins of Indonesia
• List of rivers of Indonesia
• List of rivers of Sumatra

References

1. ^ Francisca, Wit; Tim, Rixen; Antje, Baum; Widodo, S. Pranowo; Andreas, A. Hutahaean (2018). "The Invisible Carbon Footprint as a hidden impact of peatland degradation inducing marine carbonate dissolution in Sumatra, Indonesia". Scientific Reports. 8. doi:10.1038/s41598-018-35769-7. PMC 6258705. PMID 30479397.
2. Rand McNally, The New International Atlas, 1993.
3. Sungai Rokan at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27
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.

2°00′00″N 100°52′00″E / 2.0°N 100.86667°E / 2.0; 100.86667

• Rivers of Riau
• Rokan basin