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.

Quick Facts Ji-Paraná River Machado River, Location ...

Ji-Paraná River Machado River
Bridge (BR-364 highway) over the river in Ji-Paraná city
Location of the mouth of the Ji-Paraná River in the Amazonas watershed
Location
Country	Brazil
Physical characteristics
Source
• location	Confluence of Pimenta Bueno and Comemoração, Parecis plateau, Rondônia, Brazil
• elevation	173 m (568 ft)
Mouth	Madeira River
• location	Rondônia, Brazil
• coordinates	8°02′55″S 62°53′51″W
• elevation	43 m (141 ft)
Length	820 km (510 mi)[1]
Basin size	76,127 km2 (29,393 sq mi)[2]
Discharge
• location	Confluence of Madeira, Rondônia
• average	2,100 m3/s (74,000 cu ft/s)[2]
• minimum	596 m3/s (21,000 cu ft/s)[2]
• maximum	4,360 m3/s (154,000 cu ft/s)[2]
Basin features
Progression	Madeira → Amazon → Atlantic Ocean
River system	Amazon
Tributaries
• left	Pimenta Bueno, Jaru, Rolim de Moura, Muqui, Urupá, Machadinho, Juruazinho, Preto
• right	Comemoração, São João

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Part of the river's basin is covered by the 221,218 hectares (546,640 acres) Jacundá National Forest, a sustainable use conservation unit.^[3] Part of the basin is in the 346,861 hectares (857,110 acres) Jaru Biological Reserve, a fully protected conservation unit created in 1984.^[4] 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.^[5]

• List of rivers of Rondônia