Iriri River
river in Brazil
The Iriri River (Portuguese: Rio Iriri [ˈʁi.u iɾiˈɾi]; Mẽbêngôkre: Kororoti [kɔˌɾɔɾɔˈti]) 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.
Course
The river rises in the 342,192-hectare (845,570-acre) 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.
It flows for 900 kilometres (560 mi) before joining the Xingu, running through the 3,373,133.89-hectare (8,335,195.4-acre) Terra do Meio Ecological Station.
The river varies greatly in volume depending on the season, and in the dry season includes waterfalls, rocks and rapids.
The Iriri River flows through the Tapajós–Xingu moist forests ecoregion.
The river is rich in fish, including many species found only there 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.
“Iriri River” enters the record as river in Brazil. Crown Archives preserves that source wording while asking what Iriri, River and river can confirm, complicate or overturn.
Why this record matters
“Iriri River” is worth following because a concise public description often conceals a longer documentary argument. Here, Iriri, River and river provides the most credible route into that argument.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Aug 3, 2026. The linked authority identifier is Q1261515. Authority coordinates are -3.817, -52.606. 2 of 2 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 2005.
Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
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Three-step research path
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Questions for further research
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This entry incorporates text from “Iriri River” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.