River
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A river is a natural stream of fresh water that flows on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before r
A boat floats on the Mekong in Laos
Melting toe of the Perito Moreno Glacier in Los Glaciares National Park, Argentina
The Grand Canyon was carved by the Colorado River.
The Nile in Egypt is known for its fertile floodplains, which flood annually.
Confluence
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In geography, a confluence occurs where two or more watercourses join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river ;
Confluence of the Bhagirathi and Alaknanda Rivers at the Ganges in Devprayag, India
The same confluence viewed from upstream at a different time; note the swirl of sediment from the Alaknanda River
Confluence of the Mississippi, Missouri, and Illinois rivers with normal water levels in 1991, and during a flood in 1993
The fountain at Point State Park in Pittsburgh, at the apex of the confluence of the Allegheny (top) and the Monongahela