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East Kalimantan East Kalimantan (Indonesian language, Indonesian: ) is a Provinces of Indonesia, province of Indonesia. Its territory comprises the eastern portion of Borneo/Kalimantan. It had a population of about 3.03 million at the 2010 census (within the cu ...

, mouth_location =

Mahakam River The Mahakam River ( Indonesian: ''Sungai Mahakam'') is third longest river (with the third greatest volume discharge) in Borneo after the Kapuas River and the Barito River, it is located in East Kalimantan province of Indonesia. It flows from ...

, subdivision_type1 = Country , subdivision_name1 = Indonesia , progression = Mahakam →

Makassar Strait Makassar Strait () is a strait between the islands of Borneo and Sulawesi in Indonesia. To the north it joins the Celebes Sea, while to the south it meets the Java Sea. To the northeast, it forms the Sangkulirang Bay south of the Mangkalihat P ...

, width_avg= (Kenohan,

Kutai Kartanegara Regency Kutai Kartanegara Regency (abbreviated as ''Kukar'') is a regency of East Kalimantan Province, Indonesia. It has a land area of 27,891.13 km2 and a water area of 4,097 km2, geographically located between 1°18′40″S and 116°31′3 ...

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) , length = , source1_elevation = , source1_coordinates= , mouth_elevation = , mouth_coordinates= , tributaries_left=Palah, Pedahah , tributaries_right=Bengen, Ritan, Senteka , discharge1_location=Liang,

(near mouth) , discharge1_avg =(Period: 1996–2005) , discharge2_location=Tabang (140 km upstream of mouth, ; Basin size: , discharge2_min=(Year: 1994) , discharge2_avg=(Period: 1990–2008) , discharge2_max=(Year: 2001) , basin_size = The Belayan River is a river of

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

, Indonesia, 1300 km northeast of the capital

Jakarta Jakarta (; , Betawi language, Betawi: ''Jakartè''), officially the Special Capital Region of Jakarta (; ''DKI Jakarta'') and formerly known as Batavia, Dutch East Indies, Batavia until 1949, is the capital and largest city of Indonesia and ...

. It is a tributary of the

Hydrology

The river traverses three districts in the upstream area of

, namely Kenohan, Kembang Janggut, and Tabang.Sungai Belayan, Urat Nadi Warga Hulu Kukar
STV Samarinda. 21 March 2018. The high flow rate during flooding constantly eroded the land on the river banks, causing damage to the houses built next to it. Belayan flows into the

near Muhuran, Kotabangun, and Bukit Tinjawang.

Geography

The river flows in the eastern area of

island with a predominantly

tropical rainforest climate A tropical rainforest 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 southeast Florida, United States ...

(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 2780 mm. The wettest month is December, with an average of 351 mm of rainfall, and the driest is August, with 138 mm of rainfall.

Discharge

Average, minimum, and maximum discharge of the Belayan River at Tabang (). The period from 1990 to 2008.

Width and depth

Uses

The Belayan River is vital for the population along its banks for transportation, water source for daily life, and also for occupation for some inhabitants, such as fish and gold. The river is important for the people of three districts, Kenohan, Kembang Janggut, and Tabang, even for centuries was the only access route to those three districts. Upstream of Belayan, there are some villages of the Dayak Kenyak tribe, such as Ritan Baru, Tabang District, which can be reached in about one or two days by boat or ferry from

Samarinda Samarinda is the capital city of the Provinces of Indonesia, Indonesian province of East Kalimantan on the island of Borneo. The city lies on the banks of the Mahakam River with a land area of . Samarinda was one of Indonesia's top ten City qu ...

. It took about two days and one night to travel from Tabang to Tenggarong using river transportation. The local Dayak tribe is known for wood sculptures and other handicrafts. Along the river, there are many ports to transport coals from the mines in Kutai Kartanegara for export. Due to sedimentation, the Belayan River needs to be dredged regularly, so that it flows steadily downstream and doesn't cause much flooding.Sungai Belayan akan Dikeruk
Koran Kaltim. 8 August 2017.

Ecology

The Belayan River is a

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

of the Mahakam or Irrawaddy dolphin (''Orcaella brevirostris''), one of the river animals in the

IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...

Red List of Threatened Species The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological spe ...

, and also of

little egret The little egret (''Egretta garzetta'') is a species of small heron in the family Ardeidae. It is a white bird with a slender black beak, long black legs and, in the western race, yellow feet. As an aquatic bird, it feeds in shallow water and on ...

(''Egretta garzetta''). Sungai Belayan, Anak Sungai Mahakam Dalam Bingkai Imaji
Yunaidi Joepoet. Ransel Kosong. Oktober 2013.

Hydrology

Geography

Discharge

Width and depth

Uses

Ecology

See also

References

Further reading