Water manning (Water Overlay)

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The default function values for a number of buildings. The user can easily change these values.

Buildings have an inherent "roughness", affecting the flow of water across their surface, which is expressed by the Gauckler–Manning coefficient or, in short, Manning's value (n).


  • The manning value can alternatively be provided as a prequel.
  • The default function values are derived from online accessible databases[1] and are readily adjustable by the user.
  • If no Buildings are present on a Terrain, the WATER_MANNING value of the surface terrain is used.

See also


  1. WikiEngineer (2008-2011). Manning Roughness Coefficients. Retrieved from: http://wikiengineer.com/Water-Resources/ManningRoughnessCoefficients