The National Soil Erosion Research Laboratory

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Landslides

Landslides, and other mass failures, occur when the underlying layers of soil are more saturated and erodible than the outer layers. As water seeps through the surface it acts as a lubricant and causes the outer layers to detach. Then gravitational forces take over and cause the mass to slide rapidly to the foot of the hill or the bottom of the gully.

 


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