Parts of a River
From the Source to the Mouth
A watershed is water that drains into a river. The water usually comes from a higher area to a lower area.
The divide is a object that separates the two larger rivers.
A great basin is a watershed that doesn't flow into the ocean. The great Salt Lake is an example. If there is no outflow, the water evaporates and salt is left behind.
The source is the original point from which the river flows from. The source is the farthest away from the river's confluence with another river or stream.
The confluence is a place where two rivers meet.
The headwaters are the extreme upper reaches of a stream.
The downriver is the area between the headwaters and the flood plain.
The floodplain is flat land that is adjacent to s river channel that is underwater when the river near it floods.
The tributary is a stream or river that flows into a mainstream.
The mouth/delta is the area formed from the deposition of sediments at the mouth of a river.