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Guaviare River

The Guaviare is a tributary of the Orinoco in Colombia. It flows together with the upper Orinoco (until here also called Río Parágua), which it clearly surpasses in length (altogether about 1,760 km) and water flow. Thus, the Guaviare is hydrologically the main stream of the Orinoco system.


The Guaviare is a tributary of the Orinoco in Colombia. It flows together with the upper Orinoco (until here also called Río Parágua), which it clearly surpasses in length (altogether about 1,760 km) and water flow. Thus, the Guaviare is hydrologically the main stream of the Orinoco system.

The Guaviare has its source in two other rivers, the Ariari and the Guayabero, which in turn have their own sources in the eastern part of the Andes. At 1,760 km (1,090 mi) long, it is the longest tributary of the Orinoco and is navigable for 630 km (390 mi) of its total length. The Guaviare is considered the border between the Llanos and the Amazon rainforest. Its main tributary is the Inírida River.

Average, minimum and maximum discharge at Coayare (Guayare), 3°57′30.3876″N 67°50′5.748″W / 3.958441000°N 67.83493000°W / 3.958441000; -67.83493000 (Lower Guaviare). Period: 1985–2015.

YearDischarge (m3/s)
19851,206.56,426.1712,716
19862,006.76,687.5812,885
19871,620.47,063.1712,664
19882,1406,415.8315,906
19892,6746,843.6715,800
19902,2377,433.1715,274
19918506,999.3314,910
19929645,893.8313,866
19931,0317,613.9213,229
19948267,025.6713,722
19951,6636,014.0812,689
19961,5656,928.8313,413
19972,2326,634.511,841
19982,3427,370.4213,281
19992,7757,311.9211,574
20001,6056,894.3314,291
20011,8356,289.1714,500
20021,0815,716.2513,978
2003921.17,002.8313,319
2004938.87,087.4214,483
20051,3816,411.0814,500
20061,5987,22714,256
2007962.47,149.9214,201
20081,1776,649.8313,860
20091,7955,806.4214,465
2010891.66,587.7513,270
20111,3567,03613,030
20121,7807,183.3315,157
20131,1116,941.1714,100
20141,0167,050.8314,830
20151,6136,449.6714,500
Avg.1,522.46,778.913,877.4

Average discharge

PeriodDischargeRef.
Near mouth
4°4′26.5656″N 67°43′14.8008″W / 4.074046000°N 67.720778000°W / 4.074046000; -67.720778000
1926–20117,529 m3/s (265,900 cu ft/s)
1971–20008,157.9 m3/s (288,090 cu ft/s)
1974–20088,416 m3/s (297,200 cu ft/s)
7,400 m3/s (260,000 cu ft/s)
8,200 m3/s (290,000 cu ft/s)
Coayare (Guayare)
3°57′30.3876″N 67°50′5.748″W / 3.958441000°N 67.83493000°W / 3.958441000; -67.83493000
1971–20007,254.9 m3/s (256,200 cu ft/s)
1991–20207,389 m3/s (260,900 cu ft/s)
1985–20156,778.9 m3/s (239,390 cu ft/s)
6,700 m3/s (240,000 cu ft/s)
6,887 m3/s (243,200 cu ft/s)
San José del Guaviare
1971–20001,594.8 m3/s (56,320 cu ft/s)
1,930 m3/s (68,000 cu ft/s)

Sediment load at mouth ca 30 million ton/year.

The main tributaries from the mouth:

| Left tributary | Right tributary | Length (km) | Basin size (km2) | *Average discharge (m3/s) | | --- | --- | --- | --- | --- | | Guaviare | 1,760 | 151,606.9 | 8,157.9 | | | Lower Guaviare | | | | | | | Atabapo | 185 | 12,531.3 | 895 | | Inírida | 1,419 | 53,816.9 | 2,948.4 | | | Uvá | | | 14,813.9 | 782.6 | | Middle Guaviare | | | | | | | Caño Minisiare | | 2,335.5 | 119.3 | | Caño Mina | | 381.9 | 20 | | | Caño Cumaral | | | 391.5 | 21.3 | | Iteviare | | 4,618 | 221.3 | | | Siare | | 4,574.5 | 197.9 | | | Caño Araguato | | 712.3 | 38.5 | | | | Caño Macú | | 781.1 | 37 | | Caño Yamus | | | 433 | 18.3 | | Caño Jabón | | 1,246.7 | 57.3 | | | Ovejas | | 1,639.1 | 88.1 | | | Caño El Melón | | 775.9 | 41 | | | Upper Guaviare | | | | | | Ariari | | | 11,638.6 | 600.3 | | | Guayabero | 540 | 24,345.9 | 986.2 |

*1971–2000

  • The information in this article is based on a translation of its German equivalent.

  • (in Spanish) Territorial-Environmental Information System of Colombian Amazon SIAT-AC website

4°02′34″N 67°42′41″W / 4.0427°N 67.7115°W / 4.0427; -67.7115

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