The Ogan River is a river in South Sumatra, Indonesia.[1] It is a tributary of the 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 the Musi at Kertapati, Palembang.[2] The Ogan ranks as the third longest river in South Sumatra (behind Musi and Komering). The river either borders or flows through the regencies of South OKU, OKU, OKI, and Ogan Ilir.

Ogan River
Sungai Ogan, Air Ogan, Aek Ogan
Ogan River is located in Sumatra
Ogan River
Location of river mouth
Ogan River is located in Indonesia
Ogan River
Ogan River (Indonesia)
Location
CountryIndonesia
Physical characteristics
SourceLake Ranau, Barisan Mountains
 • locationSouth Ogan Komering Ulu Regency
 • coordinates4°52′03″S 103°55′56″E / 4.8674°S 103.93226°E / -4.8674; 103.93226
 • elevation550 m (1,800 ft)
MouthMusi River (Indonesia)
 • location
Kertapati, Palembang
 • coordinates
3°00′47″S 104°45′01″E / 3.013011°S 104.750270°E / -3.013011; 104.750270
Basin features
River systemMusi basin

The Ogan and Pegagan tribes 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

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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
JFMAMJJASOND
 
 
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

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References

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  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. ^ a b "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.

3°00′50″S 104°45′03″E / 3.01396°S 104.75093°E / -3.01396; 104.75093