Major River Basins of the World
Rivers form a hydrological mosaic, with an estimated 263 international river basins covering 45.3% of the land surface area of the earth, excluding Antarctica. This graphic shows the locations of 26 of the world's major river basins. A basin is defined as the land area (watershed) where all surface water drains to a certain river.
Year: 2005
From collection: Vital Water Graphics
Cartographer: Philippe Rekacewicz, Delphine Digout, UNEP/GRID-Arendal