Asahan
Asahan is a mapped river in the YearMaps hydrographic index. River courses organise settlement, agriculture and frontier-making more durably than any political boundary, and this reach is indexed against the dams, lakes and cities within its catchment.
- Feature Class
- River
- Coordinates
- 2.69°, 99.53°
About Asahan
The Asahan River (Indonesian: Sungai Asahan) is one of the principal rivers in North Sumatra, Indonesia, that begins in Porsea, Toba Regency near the southeast corner of Lake Toba.
Encyclopedic summary adapted from Wikipedia: Asahan River (CC BY-SA 4.0).
Asahan in Depth
Geography
The river flows along the northeast 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 25 °C, and the coldest is May, at 23 °C. The average annual rainfall is 2950 mm. The wettest month is November, with an average of 381 mm rainfall, and the driest is June, with 117 mm rainfall.
Hydrology
The largest city on the Asahan is Tanjungbalai, Asahan with a population of more than 180,000 people. The river houses the Sigura-gura Dam, which supplies power to the North Sumatran Province.
Tributaries of the Asahan include the Silang, Silau, Nantalu, Masihi, Lauran, and Baru River.
Sections adapted from Wikipedia: Asahan River (CC BY-SA 4.0).
Asahan: Key Facts
| Length | 150 km |
|---|---|
| Average discharge | 79 m³/s |
| Source | Lake Toba |
| Mouth | Strait of Malacca |
Facts from Wikidata Q2736616 (CC0).
Major River Dossiers
Hand-written studies of the great river systems of history.
Connected Reaches
Nearby watercourses in the same drainage network.
Water Bodies in the Catchment
Settlements Along the Reach
Hydraulic Infrastructure Nearby
Surrounding Terrain
Asahan: Quick Answers
- Where is Asahan?
- Asahan is located in Indonesia, at 2.6878° N, 99.5267° E.
- Are there dams on the Asahan?
- No dam on the Asahan is recorded in the YearMaps dam index, which covers major structures only.