Tocantins basin

The Tocantins basin, or Araguaia-Tocantins basin, is a Brazilian river basin, almost entirely located between the 2ºS and 18ºS parallels and the 46ºW and 56ºW meridians. The main rivers in the basin are Tocantins and Araguaia.

The basin extends to the states of Tocantins and Goiás (58%), Mato Grosso (24%), Pará (13%), Maranhão (4%), in addition to the Federal District (1%). It is the largest hydrographic basin entirely Brazilian.

For water resource management purposes, it is inserted in the Tocantins-Araguaia hydrographic region.

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