Tributary
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A tributary, or an affluent, is a stream that typically flows into a larger stream or lake, or rarely into a smaller stream, e.g., the Esla tributary to the Douro. A tributary does not flow directly i
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 right, making the Shenandoah a right tributary of the Potomac.
Huai River (itself a tributary of the Yangtze) and tributaries
![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](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Mekongbasin.jpg/500px-Mekongbasin.jpg)
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.
Stream
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A stream is a continuous body of surface water flowing within the bed and banks of a channel. The channel is a watercourse, although the watercourse may be seasonally or periodically dry. Depending on
Tributary
…A tributary, or an affluent, is a stream that typically flows into a larger stream (main stem or parent) or lake, or rarely into a smaller stream, e.g., the Esla tributary to the Douro. A…
Cvrcka in Bosnia
Rocky stream in Italy
Frozen stream in Enäjärvi, Pori, Finland
Stream near Montriond in south-eastern France