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It could become a waterfall. Or if it just flows over onto more land then it becomes a river, not a stream.
Yes, it is correct.
After a stream's discharge increases, it overflows its banks and a flood occurs.
The mouth of a stream is where the stream flows out into a larger body of water.
When the water from the stream flows onto a flat plain it countines to flow but not as fast as before it becomes a slow moving stream. It may even become completely still.
Lake
When the water from the stream flows onto a flat plain it countines to flow but not as fast as before it becomes a slow moving stream. It may even become completely still.
tributary
tributary
tributary
tributary
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.