Bolivia

Bolivia has a drainage area of the Amazon Basin of 733,000 km², 12% of the total area of the basin, representing 65.5% of the Bolivian territory. The main basins are those of rivers Beni and Mamoré.

Brazil

Brazil has a drainage area of the Amazon Basin of 3,850,560 km², which is about 63% of the total area of the basin, representing 45% of the Brazilian territory. The main basins are those of rivers Solimões, Madeira, Negro, Xingu and Tapajós.