description Madeira River Overview
The Madeira River is one of the largest and longest tributaries of the Amazon River, spanning approximately 3,250 kilometers through Bolivia and Brazil. Formed by the confluence of the Beni and Mamoré rivers, it accounts for roughly 15% of the Amazon River's total water discharge. The waterway is a vital regional transportation route and has been significantly altered by recent hydroelectric dam projects, such as the Santo Antônio and Jirau dams in Brazil.
help Madeira River FAQ
How long is the Madeira River?
The Madeira River spans approximately 3,250 kilometers through Bolivia and Brazil, making it one of the longest tributaries of the Amazon River. It is formed by the confluence of the Beni and Mamoré rivers and eventually joins the Amazon near the city of Manaus.
How much water does the Madeira River contribute to the Amazon?
The Madeira River accounts for roughly 15% of the Amazon River's total water discharge, making it the largest tributary of the Amazon by volume. This significant contribution underscores the Madeira's importance to the overall Amazon basin ecosystem.
Are there hydroelectric dams on the Madeira River?
Yes, two major hydroelectric dams—the Santo Antônio and Jirau dams—were constructed on the Madeira River in the Brazilian state of Rondônia, with both becoming operational in the 2010s. These projects were controversial due to their environmental and social impacts on the surrounding rainforest and indigenous communities.
What countries does the Madeira River flow through?
The Madeira River flows through both Bolivia and Brazil. Its headwaters form at the confluence of the Beni and Mamoré rivers near the Bolivia-Brazil border, and the majority of its course runs through the Brazilian states of Rondônia and Amazonas.
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