Tocantins basin

[1] 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%).

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

[2] Its length is approximately 2,500 km, from its water source, in the Serra Dourada, to the mouth, in the bay of Marajó (Pará).

It has an elongated configuration in the longitudinal direction, which follows the two fluvial axes — Tocantins and Araguaia — which join at the northern end of the hydrographic basin.

[3] The relief is considered a monotope, with altitudes varying between 350m and 500m, except in the river springs, where it reaches more than 1,000m.