Because it has less energy and can carry less sediments.
As a river flow slows, the sediment starts to settle out. The water at the river's edge often has the lowest flow or movement so there will be more sedimentation.
Because it has less energy and can carry less sediments.
Because water slows down and sediment drops to the bottom
Sediment
Runoff is water flowing over land that carries particles of sediment.
The flow of water slows enough for the silt to be deposited.
Sediment deposited by flowing water
the sediment could change in order bto the types of erosions. as a river slows larger pieces settle first gravel settes first, then sand, and then tiny clay sized clay particles
runoff
When water slows down. When water slows down it no longer has the ability to carry a lot of sediment and so deposition occurs
a bedload
Abrasion