Tietê River
river in São Paulo, Brazil
The Tietê River (Portuguese: Rio Tietê [tʃi.eˈte]) is a Brazilian river in the state of São Paulo.
The first known use of the name Tietê was on a map published in 1748 by d’Anville. The name means "truthful river", or "truthful waters”, in Tupi.
The Tietê River is a historically significant and economically important river, which stretches 450 kilometers and allows for navigation of barges carrying various goods.
Pollution of the Tietê River began subtly in the 1920s, but it has worsened significantly over time. In September 2010, National Geographic identified the river as the most polluted in Brazil. Despite efforts to clean up the river, it still suffers from pollution and environmental degradation, and some species are threatened, or possibly extinct.
Source
The headwaters are in the Serra do Mar, to the east of São Paulo.
Salesópolis hydroelectric station
One of the first hydroelectric power stations constructed in Brazil, "Usina Parque de Salesópolis", constructed in 1912 by the São Paulo Tramway, Light and Power Company, is on the Tietê, in the municipality of Salesópolis. It generated energy from the water dropping a height of 72m through a pair of surface pipes.
This brief starts where responsible research should: with the source description of “Tietê River” as river in São Paulo, Brazil. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the places & architecture register because the source frames it as river in São Paulo, Brazil. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Aug 6, 2026. The linked authority identifier is Q849539. VIAF identifies the subject as 315526288. Authority coordinates are -20.628, -51.565. 3 of 3 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1748, 2010 and 1912.
A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. 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.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Tietê River”, its source revision and the description used here.
- Expand the search: follow Tietê River primary sources, Tietê River archive and Tietê research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Tietê River”?
- Which authority defined the place, boundary or structure at the relevant date?
- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “Tietê 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.