Terrain water manning (Water Overlay): Difference between revisions

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[[File:Water_manning.png|150px|right|thumb|none|alt=Alt text|The default value for the WATER_MANNING attribute of surface type "Open land". The user can change this value.]]
[[File:Water_manning.png|150px|right|thumb|none|alt=Alt text|The default value for the WATER_MANNING attribute of surface type "Open land". The user can change this value.]]
{{terrain attributes
{{terrain attributes|suppresscategory=true|
| <onlyinclude>
{{:water manning (Terrain Attribute)}}
{{terrain attributes|type=row|overlay=Water
|attribute=WATER_MANNING
|unit=s/(m<sup>1/3</sup>)
|layer=Surface
|description=The Gauckler–Manning coefficient of the terrain
|icon=waterwizard_icon_manning.png
}} </onlyinclude>
}}
}}


Revision as of 15:28, 27 February 2024

Alt text
The default value for the WATER_MANNING attribute of surface type "Open land". The user can change this value.
Icon Attribute Unit Layer Range Description
Waterwizard icon manning.png WATER_MANNING s/(m1/3) Surface The Gauckler–Manning coefficient of the terrain, which is a measure of surface roughness. Used in the surface flow computation of the Water Overlay.

Terrains 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).

Notes

  • The values for this attribute are clamped between 0.01 and 0.255.
  • The manning value can alternatively be provided as a prequel.
  • The default values for this attribute are derived from online accessible databases[1] and are readily adjusted by the user.
  • If a building is present on the terrain, the WATER_MANNING value of the building is used instead.
  • Only terrains of type 'surface' have an assigned WATER_MANNING.

See also

References

  1. ↑ WikiEngineer (2008-2011). Manning Roughness Coefficients. Retrieved from: http://wikiengineer.com/Water-Resources/ManningRoughnessCoefficients
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Terrain attributes
Ground infiltration md •  Hydraulic conductivity md •  Hydraulic conductivity with thickness md •  Root depth m •  Water •  Water evaporation factor •  Water manning •  Water microrlief m •  Water storage percentage
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Building attributes • Hydrological features • Hydraulic structures • Model attributes • Results • Simulation data
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