Parts of a River
A water source is were the water comes form. Normally the tops of mountains.
One of the parts of a river is headwaters . A headwaters are the area of high water where there is minimal sunlight and is calm.
A floodplain is normally at the bottom. It is land that gets flooded during rainy times.
Downriver is the fastest part. It is in the middle of flood plain and headwaters.
A delta is an outflow to the ocean/sea.
A tributary is a side flow away from the mainstream.
A divide is a mountain or hills that separate water.
A water body that stays still. When water evaporates salt is left behind. A great basin has no outflow to anything.
This is an area of high water to low water that empty's out into a larger body of water.
To review here's a video