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Agriculture | n. m.
rain water that runs along the surface of the ground.

Example

The splash of raindrops and run-off water can easily remove lighter aggregate materials such as very fine sand, silt, clay and organic matter. [...] The tendency to consolidate small olive orchards into larger ones often results in longer slope lengths, which is reflected in an increase of erosion potential due to the increase of water velocity with the consequent carrying capacity for sediments.

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