Question

What are check dams? Why they are built?​

Answer 1

Answer:

A check dam is a small, sometimes temporary, dam constructed across a swale, drainage ditch, or waterway to counteract erosion by reducing water flow velocity. Check dams themselves are not a type of new technology; rather, they are an ancient technique dating from the second century A.D.

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Answer 2

Check dams are used primarily to control water velocity,conserve soil improve land.They are used when other flow-control practices, such as lining the channel or creating bioswales,are impratical.Check dams have traditionally been impletented into two environments: across channel bottoms and on hilly slopes.It is usually built over rivers and streams.