Asem River

Asem River (Ci Asem) is a river in northern West Java province on Java island, Indonesia.[1] The river rises on Mount Tangkuban Perahu and discharges into the Bay of Ciasem, Java Sea, traversing Ciasem, Subang Regency, around 90 km east of the capital Jakarta.[2]

Asem River
Ci Asem, Sungai Ciasem, Ciasem, Tjiasem, Tji Asem
Location in Java
Asem River (Indonesia)
Physical characteristics
SourceTangkuban Perahu
  locationWest Java
MouthJava Sea
Subang Regency


Asem river is one of the three main rivers in the Subang Regency.[3] There are a total of 21 rivers and 61 tributaries in the watershed area of (Daerah Aliran Sungai/DAS) Ciasem of 731.091 km2. Compared to the other two main rivers - Ci Punegara and Ci Lamaya - Asem river and its many tributaries all flow only within the Subang Regency. The river has a total length of 60 kilometer until northern coast.[3]


The river flows in the northwest area of Java with predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).[4] The annual average temperature in the area is 25 °C. The warmest month is September, when the average temperature is around 28 °C, and the coldest is July, at 24 °C.[5] The average annual rainfall is 2810 mm. The wettest month is January, with an average of 454 mm rainfall, and the driest is September, with 14 mm rainfall.[6]

See also


  1. Ci Asem at (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27
  2. Rand McNally, The New International Atlas, 1993.
  3. Sering Menelan Korban Jiwa, Inilah Catatan Kelam Sungai Ciasem yang Misterius dan Melegenda - Soeara Rakjat. December 17, 2016.
  4. Peel, M C; Finlayson, B L; McMahon, T A (2007). "Updated world map of the Köppen-Geiger climate classification". Hydrology and Earth System Sciences. 11: 1633–1644. doi:10.5194/hess-11-1633-2007. Retrieved 30 January 2016.
  5. "NASA Earth Observations Data Set Index". NASA. 30 January 2016.
  6. "NASA Earth Observations: Rainfall (1 month - TRMM)". NASA/Tropical Rainfall Monitoring Mission. 30 January 2016.

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