Rokan River
Sungai Rokan, Soengai Rekan
Map of the Rokan (left) and Indragiri rivers by Isaak de Graaf, circa 1690-1743.
Rokan River is located in Sumatra
Rokan River
Location of river mouth
Rokan River is located in Indonesia
Rokan River
Rokan River (Indonesia)
Location
CountryIndonesia
ProvinceRiau
Physical characteristics
Source 
 • locationBarisan Mountains
Mouth 
 • location
Malacca Strait
Length350 km (220 mi)
Basin size19,258 km2 (7,436 sq mi)[1]
Discharge 
 • locationRokan Delta, Bagansiapiapi, Malacca Strait
 • average(Period of data: 2009–2013)1,506 m3/s (53,200 cu ft/s)[1]
Basin features
Tributaries 
 • leftRokan-kanan River
 • rightRokan-kiri River

Rokan River is a river in Riau province, central-eastern Sumatra, Indonesia, about 1,100 km northwest of the capital Jakarta.[2][3]

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).[4] 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.[5] 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.[6]

See also

References

  1. 1 2 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.
  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

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