Barumun River is a Sumatran river that begins in Siraisan,

Padang Lawas Regency Padang Lawas is a regency in North Sumatra province of Indonesia. It covers an area of 3,912.18 km2, and had a population of 226,807 at the 2010 Census and 261,011 at the 2020 Census. Its administrative seat is the town of Sibuhuan. Padang Lawas ...

in the southeastern

North Sumatra North Sumatra ( id, Sumatra Utara) is a province of Indonesia located on the northern part of the island of Sumatra. Its capital and largest city is Medan. North Sumatra is Indonesia's fourth most populous province after West Java, East Java and ...

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 1200 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 Barumun
at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27

Hydrology

The river flows northward through North Padang Lawas,

South South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west. Etymology The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...

and

Labuhan Batu Regency Labuhanbatu Regency (''Kabupaten Labuhanbatu'', alternatively ''Kabupaten Labuhan Batu'') is a regency of North Sumatra, Indonesia. Its seat is Rantau Prapat. It had an area of 9,322.5 km2 in 2000 (prior to the separation of the new North La ...

before it reaches Sumatra east coast with its estuary in

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 ...

. The largest city on the Barumun is Kotapinang, South Labuhan Batu, with a population of 54.000 people. While the largest city in the Barumun basin is

Rantau Prapat Rantauprapat is a town in North Sumatra province of Indonesia and it is the seat (capital) of Labuhan Batu Regency. Rantauprapat is also a village within the district of Rantau Utara (North Rantau). It consists of 3 main roads. A number of citizen ...

, which is located on the Bilah with a population of 164.000 people. It is the largest river in Sumatra with length at about 440 km. Tributaries include the Bilah, Kanan, Batang Pane, Sihapas and Aek Sangkilon. All tributaries of Barumun River are sourced from mountainous areas along

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 ...

Geography

The river flows in the northern area of Sumatra with predominantly

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 May, when the average temperature is around 25 °C, and the coldest is January, at 22 °C. The average annual rainfall is 2801 mm. The wettest month is November, with an average of 381 mm rainfall, and the driest is March, with 126 mm rainfall.

References

{{Rivers of Sumatra Rivers of North Sumatra Rivers of Indonesia

Hydrology

Geography

See also

References