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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
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
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
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
The fountain at Point State Park in Pittsburgh, at the apex of the confluence of the Allegheny (top) and the Monongahela
Tributary
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A tributary, or an affluent, is a stream that flows into a larger stream or lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem into which they flow drain the s
Nam Khan flows into the Mekong at Luang Prabang in Laos.
Nam Khan flows into the Mekong at Luang Prabang in Laos.
At Harpers Ferry, West Virginia, looking downstream, the Shenandoah River (bottom right) meets the Potomac River, which flows from bottom left to top
At Harpers Ferry, West Virginia, looking downstream, the Shenandoah River (bottom right) meets the Potomac River, which flows from bottom left to top right, making the Shenandoah a right tributary of the Potomac.
The Mekong is a trans-boundary river, originating in the Tibetan Plateau. Its upper tributary river systems (e.g. ngom chu [zh]) are restricted to nar
The Mekong is a trans-boundary river, originating in the Tibetan Plateau. Its upper tributary river systems (e.g. ngom chu [zh]) are restricted to narrow gorges, but the tributaries that feed its lower reaches (e.g. the Mun River) cover larger areas.