Laminar flow is the most common in the aquarium and simply means that the water is moving steadily and in only one direction. It is most often produced by powerheads. In the ocean, this type is found...
Inter-rill erosion : The movement of soil by rain splash and its transport by this surface flow. Rill erosion by concentrated flow in small rivulets. Gully erosion by runoff scouring large channels...
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