CHAKDAMS & SPILLWAY
Check dams are small, usually temporary dams constructed across a swale, ditch or ditch to counteract erosion by reducing water flow velocity. They are not new technology but an ancient technique dating from the second century A.D. Check dams can be used not only to slow flow velocity but also to distribute flows across a swale and guide flows toward vegetation. Although some sedimentation may result behind the dam, check dams do not primarily function as sediment-trapping devices. Check dams are made of a variety of materials. They can be permanent or temporary, depending on the situation. Logs and rock check dams are usually permanent or semi-permanent; sandbag check dams are built primarily for temporary purposes. Also, there are check dams that are constructed with rockfill or wooden boards. These dams are usually implemented only in small, open channels that drain 10 acres (0.04 km2) or less; and usually do […]
