Changes

{{Textbox|1=Check dams:

{{Textbox|1=Check dams:

*may be constructed of any resilient and waterproof material, including: rock gabions, earth berms, coarse aggregate or rip-rap, concrete, metal or pre-treated timber. Rocks used in check dams should have median diameter 25-75 mm.  

*may be constructed of any resilient and waterproof material, including: rock gabions, earth berms, coarse aggregate or rip-rap, concrete, metal or pre-treated timber. 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.

*for enhanced swales may be up to 0.6 m in height; the maximum design depth of ponded water should 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.  

*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.  

*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.  

*should have energy dissipation and erosion control measures installed in the 1 - 2 m  downstream. Examples include large aggregate or [[Turf reinforcement|turf reinforcement]]}}

*should have energy dissipation and erosion control measures installed in the 1 - 2 m  downstream. Examples include large aggregate or [[Turf reinforcement|turf reinforcement]]}}

==Sizing==

==Sizing==

{{:Check dams: Sizing}}

{{:Check dams: Sizing}}