The Ji-Paraná River (Machado River), sometimes spelled Jiparaná, is a river in Rondônia state in western Brazil. It is a tributary of the Madeira River in the Amazon Basin. For much of its length it runs roughly parallel with the northeastern state border of Rondônia. The city of Ji-Paraná is divided by the river.
|• location||Parecis plateau, Rondônia, Brazil|
|Length||820 km (510 mi)|
|• average||2,054 m3/s (72,500 cu ft/s)|
Part of the river's basin is covered by the 221,218 hectares (546,640 acres) Jacundá National Forest, a sustainable use conservation unit. Part of the basin is in the 346,861 hectares (857,110 acres) Jaru Biological Reserve, a fully protected conservation unit created in 1984. The river forms the southern boundary in Rondônia of the Campos Amazônicos National Park, a 961,318 hectares (2,375,470 acres) protected area created in 2006 that holds an unusual enclave of cerrado vegetation in the Amazon rainforest.
- 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 8 November 2014.
- Unidade de Conservação: Floresta Nacional de Jacundá (in Portuguese), MMA: Ministério do Meio Ambiente, retrieved 2016-05-16
- Unidade de Conservação: Reserva Biológica do Jaru (in Portuguese), MMA: Ministério do Meio Ambiente, retrieved 2016-04-27
- Parna Campos Amazônicos Mapa Interativo (in Portuguese), Chico Mendes Institute for Biodiversity Conservation, retrieved 2016-06-03