Parts of a River
A watershed is an area of high water, going to low water, and into a larger body of water.
This image explains the function of a watershed.
A source is where the water starts.
A rain cloud is where the water starts before the whole water system begins.
A delta/mouth is the end of the river and opening to a large body of water.
This image shows Sacramento and San Joaquin's Bay-Delta.
A great basin is a watershed where water doesn't flow to the ocean.
The image shows the areas of a great basin.
A divide separates watersheds from one another
A head water is an extreme upper reach of a stream.
The picture shows a head water with no sunlight peaking through
A downriver is between headwaters and floodplains.
The image shows Niagara Falls's downriver between a head water and a flood plain.
A tributary is a river or stream that flows into a mainstream.
The image shows a tributary flowing into a mainstream, or in this case, a river.
A confluence is a place where two rivers meet.
In the picture, the V shaped land is the confluence.
A floodplain is the relatively flat land adjacent to a river channel that's underwater when a river floods.
The image shows that when the river flooded, the floodplain went underwater.
An estuary is the area where a river meets the sea or ocean where fresh water from the river meets the salt water from the sea.
The video explains what an estuary is.