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UNEP; WCMC; WRI; AAAS; Atlas of Population and Environment, 2001.
Uploaded on Saturday 25 Feb 2012
Major river basins of the world
Delphine Digout, UNEP/GRID-Arendal
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.