Iriri River

The Iriri River (Portuguese: Rio Iriri, Portuguese pronunciation: [ˈɦiu iɾiˈɾi]; Mẽbêngôkre: Kororoti, [kɔˌɾɔɾɔˈti][1]:40) is a large tributary of the Xingu River in Brazil, in the state of Pará. It is 1,300 km (810 mi) long making it the 116th longest river in the world (with Krishna River, India) and the 15th longest in the Amazon basin. The headwaters are the traditional home of the Panará people.

Iriri River
Native nameRio Iriri (Portuguese), Kororoti (Mẽbêngôkre)[1]:40
Physical characteristics
 • locationPará, Brazil
MouthXingu River
 • coordinates
3°49′00″S 52°36′20″W / 3.81667°S 52.60556°W / -3.81667; -52.60556Coordinates: 3°49′00″S 52°36′20″W / 3.81667°S 52.60556°W / -3.81667; -52.60556
Length1,100 km (680 mi)[2]
Basin features
 • leftCuruá River, Catete River, Chiché River, Ipiranga River
 • rightNovo River, Carajarí River, Xinxim River, Iriri Novo River


The river rises in the 342,192 hectares (845,570 acres) Nascentes da Serra do Cachimbo Biological Reserve, a strictly protected conservation unit established in 2005 in the Serra do Cachimbo. It is one of the headwaters of the Xingu River.[3] It flows for 900 kilometres (560 mi) before joining the Xingu, running through the 3,373,133.89 hectares (8,335,195.4 acres) Terra do Meio Ecological Station. The river varies greatly in volume depending on the season, and in the dry season include waterfalls, rocks and rapids.[4]

The Iriri River flows through the Tapajós-Xingu moist forests ecoregion.[5] The river is rich in fish, including many species found only here and in the Xingu. Large sections remain unexplored due to its remoteness in a region surrounded by Amazon rainforest, and sections with strong current and cataracts.[6]


  1. ^ a b Passos, João Lucas Moraes (2018). Caminhos mẽbêngôkre: andando, nomeando, sentando sobre a terra (Ph.D. dissertation). Brasília: Universidade de Brasília.
  2. ^ Ziesler & Ardizzone 1979.
  3. ^ Unidade de Conservação: Reserva Biológica...
  4. ^ Unidade de Conservação: Estação Ecológica ...
  5. ^ Sears.
  6. ^ Bleher 2009.