Sedimentation is when little pieces of stuff fall to the bottom of a liquid.
Sedimentation is a natural process that happens in water and other liquids.
Examples:
The river's sedimentation makes the water look dirty.
After the storm, there was a lot of sedimentation in the pond.
The sedimentation in the glass made the water look cloudy.
The sedimentation in the juice made it taste funny.
The sedimentation in the ocean is very slow.
The sedimentation in the lake is like a magic show.