Parts of a river
the beginning or place of origin of a stream or river.
a nearly flat plain of alluvial deposit between diverging branches of the mouth of a river
the region or area drained by a river, stream, etc.; drainage area.
a region that has no drainage to the ocean
separating the larger river
Sometimes the upper tributaries of a river
with or in the direction of the current of a river
a stream or river witch flows into a main stream
a place where two rivers meet
These are all parts of a river. I have two labeled pictures of a river down there. I also have one video of a moving river.