What is a Check dams? They are small barriers built across the direction of water flow on shallow rivers and streams for the purpose of water harvesting. The small dams retain excess water flow during monsoon rains in a small catchment area behind the structure.
Check dams slow runoff velocity and promote infiltration, thereby reducing channel erosion and serving as coarse sediment traps above each check dam. May be placed below spillways to reduce water velocity and erosion.