Young Stream or Young River whichever works
The stream of water which flows like a river through the ocean is a current. The Gulf Stream is the most significant such current which flows from the tropics to the northern latitudes.
Gulf Stream
Channel (Valley)
Huang he is the river that flows through china.
it could be a valley or a gorge
An ocean current.
Ocean current
That is a glacier. Glaciers form from compacted snow that has accumulated over time and flows downhill under the force of gravity.
it could be a valley or a gorge
The River Nile flows through the Nile Valley.
A stream or river called that flows into a larger stream or river is called a tributary.