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Rill erosion images. Rill Erosion Definition Earth Science

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Vienna Soil Declaration. Degradation process: Rill erosion. Water erosion by concentrated surface runoff. Description: A short distance downstream, the roughness of the terrain and increased flow mean that sheet runoff is concentrated into channels, called rills, in which the velocity of the water increases, detaching soil particles from the bottom and sides of the channel. The flow increases down the slope, with the channels deepening and becoming gullies. Rill runoff causes the loss of mineral particles, organic matter and nutrients. Importance: great in arid and semi-arid regions.