The bottom.
The "bed" of a river is the bottom or floor of the river. It is where silt can accumulate and where bottom-feeding fish live.
The river bed describes the area whereby a river lies while the river bank refers to the slopes bordering a river.
The bottom of the river is called the river bed.
It is the river bed.
River bed
The river bed.
The river bed
The temple of Badrinath Shrine stands on the river bed of Alanknanda
the bottom of the river is called a bed
The river bed
It is where the fish sleep. Actually a 'river bed' is usually a dried out river, the place where the river ran it's course. When it fills with water it becomes the river again.
Normally there is a pool there, that is known as a plunge pool.
River bed rocks