The portion of a stream or body of water, which is moving much faster than the rest of the water. The progress of the water is principally concentrated in the current. Streams are described as water bodies that consist of one or more currents that are constantly in motion. Geologists agree that most kinds of streams are characterized by their area, speed, size, or depth. Water is always in a perpetual downhill motion with the movement downwards reliant upon the topography, type of rocks, and other factors. Deposition and erosion of the stream is highly influential of the landforms.