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 narrow gorges, but the tributaries that feed its lower reaches (e.g. the Mun River) cover larger areas.
The Mississippi River is the primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri. From its traditional sourc
Tributary
…a highlighted example of a tributary of the Wabash River. The Wabash River is also a tributary of the Ohio River, which in turn is a tributary of the Mississippi River. The Yamuna is the second-largest tributary river of the Ganges and the longest tributary in India. It flows almost parallel to the Ganges about its…
The source of the Mississippi River at Lake Itasca
The first bridge (and only log bridge) over the Mississippi, about 25 feet south of its source at Lake Itasca
De facto head of navigation, St. Anthony Falls, Minneapolis, Minnesota