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Rokan River is a river in Riau province, central-eastern Sumatra, Indonesia, about 1100 km northwest of the capital Jakarta.[1][2]

Rokan River
Sungai Rokan, Soengai Rekan
Map of the Rokan (left) and Indragiri rivers by Isaak de Graaf, circa 1690-1743.
Location of river mouth
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)
Discharge 
 • locationRokan Delta, Bagansiapiapi, Malacca Strait
 • average(Period of data: 2009-2013)1,506 m3/s (53,200 cu ft/s)
Basin features
Tributaries 
 • leftRokan-kanan River
 • rightRokan-kiri River

Hydrology


The river sourced from the Barisan Mountains in the west, and drained north-east-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).[3] 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.[4] 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.[5]


See also



References


  1. Rand McNally, The New International Atlas, 1993.
  2. Sungai Rokan at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27
  3. 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.
  4. "NASA Earth Observations Data Set Index". NASA. 30 January 2016.
  5. "NASA Earth Observations: Rainfall (1 month - TRMM)". NASA/Tropical Rainfall Monitoring Mission. 30 January 2016.


На других языках

- [en] Rokan River

[it] Rokan

Il Rokan è un fiume dell'isola di Sumatra, in Indonesia. È lungo più o meno 300 km e drena un'area di circa 19.000 km². Scorre prevalentemente attraverso una pianura paludosa ricoperta da foreste equatoriali. Sfocia nello stretto di Malacca, formando un estuario lungo circa 30 km. La sua portata è di circa 1100 m³/s. Non è mai in secca ed è navigabile. In prossimità del suo estuario sorge il porto di Bagansiapiapi[1].

[ru] Рокан

Ро́кан[1][2][3] — река в Индонезии, на острове Суматра. Длина реки около 600 км, площадь водосбора около 19 000 км²[1]. Средний расход воды составляет 1100 м³/с[1].


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