Tributaries are streams or rivers that flow into a larger main river. This much larger river also is referred to as a main stem. A tributary also is called an affluent.Continue Reading
The place where tributaries join the main stem is called the confluence. Left-bank tributaries and right-bank tributaries refer to the side of a main river where the tributaries enter the river.
When many tributaries flow into a main river, it forms a very large river, such as the Mississippi River. An example of a tributary of the Mississippi River is the Missouri River, which also is its longest tributary. Some other tributaries of the Mississippi are the Ohio River and the Wisconsin River.Learn more about Bodies of Water