How does rock dam prevent soil erosion?
Answers
Answer:
Explanation:
A check dam is a small dam constructed across a drainage ditch, swale, or channel to lower the velocity of flow. Reduced runoff velocity reduces erosion and gullying in the channel and allows sediments to settle out. A check dam may be built from stone, sandbags filled with pea gravel, or logs.
Rocks are typically used to prevent erosion by water, not wind. Rounded stones are not as effective as rocks that are jagged or angular in shape that tend to “knit” or lock together. Rocks should be less than one-third as wide as they are long.
Strategically placed boulders or rocks can really hold banks together and again, they slow the flow of water. Sheets of fabric are a great way of protecting against wind erosion. ... You can dig terraces into your slope to control surface runoff, but remember the sides need to be high enough to stop them eroding.
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