Parts of a river:
By: I.Gonzalez :)
A great basin: The great basin is a watershed where the water does not flow in the ocean.
Floodplain: A floudplain is an area of land adjacent to a stream or river that stretches from the banks of its channel to the base.
Watersheds: A watershed is a area of high water to lower water, and empty out.
Headwaters: A head-water is a tributary stream of a river close to or forming part of it's source.
Source: The source is where the water begins.
Mouth/delta: The mouth is the opening to a large body of water. A delta is a sediment deposit where a river flows into a lake that builds up a land-form.
Downriver: A downriver is a point nearer the mouth of a river.
Tributary: A stream or river which flows, into a main stream.
Divide: A ridge of land that separates two adjacent river systems
^Here is a video showing, what a watershed is.^