| Guaviare | |
| Source1 Location: | Confluence of Ariari and Guayabero Rivers |
| Source1 Coordinates: | 2.5814°N -72.7714°W |
| Source2: | Ariari |
| Source2 Location: | Cordillera Oriental |
| Source2 Coordinates: | 3.9088°N -74.1084°W |
| Source3: | Guayabero |
| Source3 Location: | Cordillera Oriental |
| Source3 Coordinates: | 3.5268°N -74.4743°W |
| Mouth Location: | Orinoco |
| Mouth Coordinates: | 4.074°N -67.7208°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Colombia |
| Length: | Guaviare–Guayabero [1] |
| River System: | Orinoco |
| Progression: | Orinoco → Atlantic Ocean |
| Tributaries Left: | Ariari, Caño El Melón, Ovejas, Caño Jabón, Siare, Iteviare, Caño Cumaral, Uvá |
| Tributaries Right: | Guayabero, Caño Macú, Caño Araguato, Caño Mina, Caño Minisiare, Inírida, Atabapo |
| Discharge1 Location: | Near mouth |
| Discharge1 Avg: | (Period: 1926–2011)[2] |
| Discharge2 Location: | Coayare (3.9584°N -67.8349°W; Basin size: |
| Discharge2 Min: | (Year: 1994)[3] |
| Discharge2 Avg: | (Period: 1985–2015)[4] |
| Discharge2 Max: | (Year: 1988)[5] |
| Discharge3 Location: | San José del Guaviare (Basin size: |
| Discharge3 Avg: | (Period: 1971–2000)[6] |
| Basin Size: | [7] |
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.[8]
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 long, it is the longest tributary of the Orinoco and is navigable for 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), 3.9584°N -67.8349°W (Lower Guaviare). Period: 1985–2015.
| Year | Discharge (m3/s) | |||
|---|---|---|---|---|
| Min | Mean | Max | ||
| 1985 | 1,206.5 | 6,426.17 | 12,716 | |
| 1986 | 2,006.7 | 6,687.58 | 12,885 | |
| 1987 | 1,620.4 | 7,063.17 | 12,664 | |
| 1988 | 2,140 | 6,415.83 | 15,906 | |
| 1989 | 2,674 | 6,843.67 | 15,800 | |
| 1990 | 2,237 | 7,433.17 | 15,274 | |
| 1991 | 850 | 6,999.33 | 14,910 | |
| 1992 | 964 | 5,893.83 | 13,866 | |
| 1993 | 1,031 | 7,613.92 | 13,229 | |
| 1994 | 826 | 7,025.67 | 13,722 | |
| 1995 | 1,663 | 6,014.08 | 12,689 | |
| 1996 | 1,565 | 6,928.83 | 13,413 | |
| 1997 | 2,232 | 6,634.5 | 11,841 | |
| 1998 | 2,342 | 7,370.42 | 13,281 | |
| 1999 | 2,775 | 7,311.92 | 11,574 | |
| 2000 | 1,605 | 6,894.33 | 14,291 | |
| 2001 | 1,835 | 6,289.17 | 14,500 | |
| 2002 | 1,081 | 5,716.25 | 13,978 | |
| 2003 | 921.1 | 7,002.83 | 13,319 | |
| 2004 | 938.8 | 7,087.42 | 14,483 | |
| 2005 | 1,381 | 6,411.08 | 14,500 | |
| 2006 | 1,598 | 7,227 | 14,256 | |
| 2007 | 962.4 | 7,149.92 | 14,201 | |
| 2008 | 1,177 | 6,649.83 | 13,860 | |
| 2009 | 1,795 | 5,806.42 | 14,465 | |
| 2010 | 891.6 | 6,587.75 | 13,270 | |
| 2011 | 1,356 | 7,036 | 13,030 | |
| 2012 | 1,780 | 7,183.33 | 15,157 | |
| 2013 | 1,111 | 6,941.17 | 14,100 | |
| 2014 | 1,016 | 7,050.83 | 14,830 | |
| 2015 | 1,613 | 6,449.67 | 14,500 | |
| Avg. | 1,522.4 | 6,778.9 | 13,877.4 | |
Average discharge
| Period ! Discharge | Ref. | ||
|---|---|---|---|
| Near mouth4.074°N -67.7208°W | |||
| 1926–2011 | [10] | ||
| 1971–2000 | [11] | ||
| 1974–2008 | [12] | ||
| Coayare (Guayare)3.9584°N -67.8349°W | |||
| 1971–2000 | [13] | ||
| 1991–2020 | [14] | ||
| 1985–2015 | [15] | ||
| San José del Guaviare | |||
| 1971–2000 | [16] | ||
The main tributaries from the mouth:[18]
| Lefttributary ! Righttributary | Length(km) ! Basin size(km2) |
(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 | ||