Tietê River

The Tietê River (Portuguese, Rio Tietê) is a Brazilian river in the state of São Paulo.

The source is in Salesópolis in the Serra do Mar, at 1,120 m altitude. Although the source is at most 22 kilometres (14 mi) from the coast, the escarpment of the Serra do Mar forces it to run in the opposite direction, to the interior, going through the state of São Paulo from southeast to northwest till it runs into the artificial lake formed by Eng Souza Dias (Jupiá) Dam on the Paraná River, in the municipality of Três Lagoas, about 50 kilometres (31 mi) from the city of Pereira Barreto.

The name Tietê was registered for the first time on a map published in 1748 by d’Anville. The name signifies "The truthful river", or "truthful waters" in Tupi.

Sources of the Tietê River

A “set of sources” make up the "Park of the sources of the Tietê River," which is situated in the municipality of Salesópolis. It is an area of about 134 hectares, of which 9,6 ha already is under environmental control. This park protects the varying sources of the river and will certainly form the most important protected area of the state of São Paulo.