Rokan River

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.

References

References

1. (2018). "The Invisible Carbon Footprint as a hidden impact of peatland degradation inducing marine carbonate dissolution in Sumatra, Indonesia". Scientific Reports.
2. Rand McNally, ''The New International Atlas'', 1993.
3. [http://www.geonames.org/1629560/sungai%20rokan.html Sungai Rokan] at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27
4. (). "Updated world map of the Köppen-Geiger climate classification". Hydrology and Earth System Sciences.
5. (30 January 2016). "NASA Earth Observations Data Set Index". NASA.
6. (30 January 2016). "NASA Earth Observations: Rainfall (1 month - TRMM)". NASA/Tropical Rainfall Monitoring Mission.