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What is a tributary?

GeographyRivers

Quick Answer

A tributary is a smaller river or stream that flows into a larger river, lake, or reservoir.

The Full Story

Tributaries feed water, sediment, and nutrients into bigger waterways, creating branching river networks. They can be seasonal or permanent, and many major rivers owe much of their flow to large tributaries. For example, the Missouri River is a major tributary of the Mississippi River, and the Madeira is one of the Amazon’s largest tributaries. Tributaries are important for ecology because they connect habitats and allow fish and other organisms to move through a watershed.

Key Facts

1.A tributary flows into a larger water body
2.Tributaries form branching drainage networks
3.Major rivers often depend on large tributaries

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Suggested video title for this topic:

"The side rivers that secretly power the world’s great waterways"