How can dams help to prevent soil erosion?
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5
Explanation:
They reduce the water flow by storing runoff.
They trapp the sediment on-site.
They block active gullies and divert the water flows to a stable area.
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A check dam placed in the ditch, swale, or channel interrupts the flow of water and flattens the gradient of the channel, thereby reducing the velocity. In turn, this obstruction induces infiltration and reduces eroding.
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