Itonomas River

The Itonomas River is a river of Bolivia that flows through the departments of Santa Cruz and Beni. It is a part of the Amazon River basin.

Itonomas River
Location
Country	Bolivia
Physical characteristics
Mouth	Machupo River
• coordinates	12°32′20″S 64°22′13″W
Length	1,493 km (928 mi)[1]

Course

Originating near Concepción Lake at the confluence of the intermittent Quimome and Santa Maria Rivers as the San Julián River,^[2] the river flows northwards until it becomes the San Pablo River near the city of Ascensión de Guarayos,^[3] after which point it forms part of the border between the Beni and Santa Cruz Departments. It then continues into further north into the Beni Department, and after flowing past the small Lake El Bi, it becomes the San Luis River,^[4] a name it retains for a short distance until taking on the name Itonomas at its confluence with the Lopez River.^[5]

Despite its considerable length, the Itonomas is nominally considered to be a tributary of the shorter Machupo River,^[6] which in turn drains into the Iténez River only a short distance further downstream. Additionally, due to the situation of its headwaters at the eastern edge of the vast Bañados del Izozog, the Itonomas can be considered to be a hydrological continuation of the Parapetí River, which originates in the Bolivian Andes.

Over its course it receives tributaries such as the Quizer River.

See also

• List of rivers of Bolivia

References

• Rand McNally, The New International Atlas, 1993.

1. Ziesler, R.; Ardizzone, G.D. (1979). "Amazon River System". The Inland waters of Latin America. Food and Agriculture Organization of the United Nations. ISBN 92-5-000780-9. Archived from the original on 21 October 2013.
2. Instituto Geográfico Militar - Bolivia [in Spanish] (1989). Comunidad San Agustin (PDF) (Topographic map). 1:100,000. Bolivia 1:100.000. La Paz: Instituto Geográfico Militar. Retrieved 15 February 2022.
3. Instituto Geográfico Militar - Bolivia [in Spanish] (1990). Ascencion de Guarayos (PDF) (Topographic map). 1:100,000. Bolivia 1:100.000. La Paz: Instituto Geográfico Militar. Retrieved 15 February 2022.
4. Instituto Geográfico Militar - Bolivia [in Spanish] (1989). El Cusi (PDF) (Topographic map). 1:100,000. Bolivia 1:100.000. La Paz: Instituto Geográfico Militar. Retrieved 15 February 2022.
5. Instituto Geográfico Militar - Bolivia [in Spanish] (1976). San Jose de Huacaraje (PDF) (Topographic map). 1:50,000. Bolivia 1:50.000. La Paz: Instituto Geográfico Militar. Retrieved 15 February 2022.
6. Instituto Geográfico Militar - Bolivia [in Spanish] (1978). Itenez (PDF) (Topographic map). 1:50,000. Bolivia 1:50.000. La Paz: Instituto Geográfico Militar. Retrieved 15 February 2022.