Rokan River is a river in

Riau Riau is a province of Indonesia. It is located on the central eastern coast of Sumatra along the Strait of Malacca. The province shares land borders with North Sumatra to the northwest, West Sumatra to the west, and Jambi to the south. Accord ...

province, central-eastern

Sumatra Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

, about 1100 km northwest of the capital

Jakarta Jakarta (; , bew, Jakarte), officially the Special Capital Region of Jakarta ( id, Daerah Khusus Ibukota Jakarta) is the capital and largest city of Indonesia. Lying on the northwest coast of Java, the world's most populous island, Jakarta ...

.Sungai Rokan
at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27

Hydrology

The river sourced from the

Barisan Mountains The Bukit Barisan or the Barisan Mountains are a mountain range on the western side of Sumatra, Indonesia, covering nearly 1,700 km (1,050 mi) from the north to the south of the island. The Bukit Barisan range consists primarily of volca ...

in the west, and drained north-east-ward along

Rokan Hulu Regency Rokan Hulu is a regency (''kabupaten'') of Riau, Indonesia. It is located on the island of Sumatra. Rokan Hulu Regency was created as a result of the division of Kampar Regency, of which it was previously the western half. The new Regency was esta ...

and

Rokan Hilir Regency Rokan Hilir ("Lower Rokan") is a regency (''kabupaten'') of Riau Province, on Sumatra island, Indonesia. It occupies the lower part of the catchment area of the Rokan River, and has an area of 8,851.59 km2. It had a population of 553,216 at ...

with estuarine located near the port town of

Bagansiapiapi Bagansiapiapi or simply known as Bagan () is a city in Riau province on the island of Sumatra, Indonesia. The city is the capital of Rokan Hilir Regency in the Riau Province and is located on the east coast of Sumatra, on the Rokan River delt ...

draining the water to

Malacca Strait The Strait of Malacca is a narrow stretch of water, 500 mi (800 km) long and from 40 to 155 mi (65–250 km) wide, between the Malay Peninsula (Peninsular Malaysia) to the northeast and the Indonesian island of Sumatra to the southwest, conne ...

. Tributaries include the

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

Kumu River Kumu River is a river in Riau province, central-eastern Sumatra, Indonesia, about 1100 km northwest of the capital Jakarta.tropical rainforest climate A tropical rainforest climate, humid tropical climate or equatorial climate is a tropical climate sub-type usually found within 10 to 15 degrees latitude of the equator. There are some other areas at higher latitudes, such as the coast of southea ...

(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

{{Authority control Rivers of Riau Rivers of Indonesia

Hydrology

See also

References