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Check dams

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Check dams are small dams or weirs constructed across a drainage ditch, swale, or channel to lower the speed of concentrated flows for a certain design range of storm events and to promote infiltration.
{{plainlist|1=Check dams:*Check dams usually consist may be constructed of crushed any resilient and waterproof material, including: rock gabions, earth berms, coarse aggregate or rip-rap, concrete, metal or pre-treated timber up to 0.6 m in height. *Rocks used in check dams should have median diameter 25-75 mm. *are used, up to 0.6 m in height; the maximum design depth of ponded water must be ≤ 0.6 m.*designed for higher flow velocities should have spillways incorporated into their profile, to direct water to the centre of the swale. *are usually installed between 10-20 m along the swale. The spacing of dams should not exceed the horizontal distance from the toe of the upstream dam to the same elevation on the downstream dam. See: Sizing *Where check dams are used, should have energy dissipation and erosion control measures installed in the maximum design depth of ponded water must be 0.5 1 - 2 m downstream.Examples include large aggregate or [[Turf reinforcement|turf reinforcement]]}} 
{{:Check dams: Sizing}}

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