Ogan River

Ogan River is a river in South Sumatra, Indonesia.[1]

Ogan River Sungai Ogan, Air Ogan, Aek Ogan
Location of river mouth Ogan River (Indonesia)
Location
Country	Indonesia
Physical characteristics
Source	Barisan Mountains
• location	South Sumatra

The Ogan River is a tributary of Musi River in Southern Sumatra. Flowing entirely in the South Sumatra province, it rises in Barisan Mountains (Bukit Barisan) and meanders slowly eastwards to join Musi River at Kertapati, Palembang.[2] The Ogan ranks as the third longest river in South Sumatra (behind Musi and Komering). The river either borders or cuts through the regency of South OKU, OKU, OKI, and Ogan Ilir.

Ogan and Pegagan tribe lived along the Ogan and its tributaries. Most were peasant or merchant. The river served first as vital transportation artery and communications link. Formed from thick layers of this river's silt deposits, the Ogan River Valley is one of the most fertile agricultural regions of the province.

Geography

The river flows in the southern area of Sumatra with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).[3] The annual average temperature in the area is 24 °C. The warmest month is October, when the average temperature is around 26 °C, and the coldest is January, at 22 °C.[4] The average annual rainfall is 2902 mm. The wettest month is November, with an average of 435 mm rainfall, and the driest is August, with 83 mm rainfall.[5]

Ogan River
Climate chart (explanation)
J F M A M J J A S O N D     341     25 20     275     25 21     326     26 21     363     26 22     161     26 21     128     27 22     146     26 21     83     26 21     83     29 20     171     31 21     435     29 21     389     26 22 Average max. and min. temperatures in °C Precipitation totals in mm Source: [4]
Imperial conversion J F M A M J J A S O N D     13     77 68     11     77 70     13     79 70     14     79 72     6.3     79 70     5     81 72     5.7     79 70     3.3     79 70     3.3     84 68     6.7     88 70     17     84 70     15     79 72 Average max. and min. temperatures in °F Precipitation totals in inches

See also

• List of rivers of Indonesia
• List of rivers of Sumatra

References

1. Rand McNally, The New International Atlas, 1993.
2. Air Ogan – Geonames.org.
3. 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 (5): 1633–1644. Bibcode:2007HESS...11.1633P. doi:10.5194/hess-11-1633-2007. Retrieved 30 January 2016.
4. "NASA Earth Observations Data Set Index". NASA. 30 January 2016.
5. "NASA Earth Observations: Rainfall (1 month – TRMM)". NASA/Tropical Rainfall Monitoring Mission. 30 January 2016.