Rio Araguaia

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Rio Araguaia
Course of the Rio Araguaia

Course of the Rio Araguaia

location Brazil
River system Rio Tocantins
Drain over Rio Tocantins  → Rio Pará (bay)  → Atlantic
source in the Serra dos Caiapós in the state of Goiás
17 ° 58 ′ 0 ″  S , 53 ° 4 ′ 0 ″  W
Source height 760  m
muzzle at São João do Araguaia in the Rio Tocantins Coordinates: 5 ° 22 ′ 34 ″  S , 48 ° 43 ′ 8 ″  W 5 ° 22 ′ 34 ″  S , 48 ° 43 ′ 8 ″  W.
Mouth height 89  m
Height difference 671 m
Bottom slope 0.31 ‰
length 2198 km
Catchment area 384,800 km²
Drain MQ
5507 m³ / s
Left tributaries Rio das Mortes
Right tributaries Rio Vermelho , Rio Crixás-Açu , Rio Javaés
Medium-sized cities Barra do Garças
Small towns Aragarças , Aruanã
Residents in the catchment area about 1.7 million
Navigable 1,300 km (to Aruanã )
Hydrologically, the main river of the Araguaia-Tocantins river system
A tree protrudes from the Araguaia in the Bananal Natural Park

A tree protrudes from the Araguaia in the Bananal Natural Park

The Rio Araguaia is a left tributary of the Rio Tocantins . At the confluence of around 5500 m³ / s, it carries significantly more water than the Tocantins and, with a length of 2,198 km, is one of the most important rivers in Brazil . Its course forms the border of several Brazilian states. The name means "river of the macaws " in the Tupi language .

River course

The Araguaia rises in the Mato Grosso Plateau in the state of Goiás near the border triangle of Goiás, Mato Grosso do Sul and Mato Grosso west of the GO-341 and the border of the Parque Nacional das Emas . From there it flows north on the border between the states of Mato Grosso and Goiás, later Mato Grosso and Tocantins , and finally Pará and Tocantins.

At its middle course, which flows broadly in a wide alluvial plain, the river divides into two arms, which later flow together again and thus form the Ilha do Bananal , the largest river island on earth. There is the National Park Araguaia , who is also the settlement area of Karajá - Indios is. Below the plain, the Araguaia forms several rapids and canyon-like narrows. It flows into the Rio Tocantins at São João , which it exceeds in length, catchment area and water flow (5,507 m³ / s compared to 4,527 m³ / s of the Tocantins).

Arapaima gigas , one of the largest freshwater fish and the river dolphin Inia araguaiaensis live in the Rio Araguaia .


Overview of the longest tributaries of the Rio Araguaia:

Left tributaries Right tributaries
  • Rio Diamantino
  • Rio das Garcas
  • Rio Cristalino
  • Rio das Mortes
  • Ribeirâo Crisóstomo
  • Ribeirâo Beleza
  • Ribeirâo Santana
  • Campo Alegre
  • Rio Inajá
  • Ribeirâo Santa Maria

See also

Web links

Commons : Araguaia River  - Collection of Images, Videos and Audio Files

Individual evidence

  1. ^ John F. McCoy, Thomson Gale: The World Geographical Encyclopedia , 3rd ed. 2002
  2. a b c Ministério do meio ambiente, Secretaria de recursos hídricos: Programa de estruturação institucional para a consolidação da política nacional de recursos hídricos - BRA / OEA / 01/002 ( Memento from 5 July 2010 in the Internet Archive ) (PDF; 8 , 5 MB) , 2006 (p. 6; port.)
  3. Inhabitants in sub-catchment areas ( Memento of the original from March 5, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot /
  4. ^ John F. McCoy, Thomson Gale: The World Geographical Encyclopedia , 3rd ed. 2002
  5. Source of the Rio Araguaia  ( page no longer available , search in web archivesInfo: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (Portuguese)@1@ 2Template: Dead Link /  
  6. Note: The island of Marajó is sometimes also referred to as the largest river island. However, it borders on the Atlantic, so it is a coastal island.
  7. ^ Kümmerly + Frey Rand McNally : International Atlas . Published by Georg Westermann Verlag ISBN 3-07-508962-1