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|width = 210px|Berm height (mm)||This is the height of the curb which constrains the overland sheet flow of water. Where the bottom of the slope discharges directly into another LID facility without impedance, the value is 0.   
 
|width = 210px|Berm height (mm)||This is the height of the curb which constrains the overland sheet flow of water. Where the bottom of the slope discharges directly into another LID facility without impedance, the value is 0.   
 
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|Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. See [[Turf]]
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|Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. See [[Turf]] for ideas of a good number according to mowing practices.
 
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|Surface slope (%)||If the slope > 3%, consider using [[level spreaders]] to reduce erosion of the surface under high flow velocities.  
 
|Surface slope (%)||If the slope > 3%, consider using [[level spreaders]] to reduce erosion of the surface under high flow velocities.  
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