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.]] | |||
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[[Terrain]]s 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''). | [[Terrain]]s 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''). | ||
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|notes= | |||
* The values for this attribute are clamped between 0.01 and 0.255. | |||
* The [[Manning prequel (Water Overlay)|manning value]] can alternatively be provided as a [[prequel]]. | |||
* The default values for this attribute are derived from online accessible databases<ref name="WikiEngineer"/> and are readily [[How to add and remove an Attribute|adjusted]] by the user. | * The default values for this attribute are derived from online accessible databases<ref name="WikiEngineer"/> and are readily [[How to add and remove an Attribute|adjusted]] by the user. | ||
* If a | * If a building is present on the terrain, the [[Water manning (Water Overlay)|WATER_MANNING]] value of the building is used instead. | ||
* Only terrains of type '[[Terrain#Surface|surface]]' have an assigned WATER_MANNING. | * Only terrains of type '[[Terrain#Surface|surface]]' have an assigned WATER_MANNING. | ||
|seealso= | |||
* [[Surface flow formula (Water Overlay)]] | |||
* [[Surface model (Water Overlay)]] | |||
* [[Surface flow formula (Water Overlay) | * [[Water manning (Water Overlay)]] | ||
* [[Surface model ( | * [[Manning prequel (Water Overlay)]] | ||
|references= | |||
<references> | <references> | ||
<ref name="WikiEngineer">WikiEngineer (2008-2011). Manning Roughness Coefficients. Retrieved from: http://wikiengineer.com/Water-Resources/ManningRoughnessCoefficients </ref> | <ref name="WikiEngineer">WikiEngineer (2008-2011). Manning Roughness Coefficients. Retrieved from: http://wikiengineer.com/Water-Resources/ManningRoughnessCoefficients </ref> | ||
</references> | </references> | ||
}} | |||
{{WaterOverlay terrain attribute nav}} | {{WaterOverlay terrain attribute nav}} | ||
Latest revision as of 15:31, 27 February 2024
Icon | Attribute | Unit | Layer | Range | Description |
---|---|---|---|---|---|
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
- Surface flow formula (Water Overlay)
- Surface model (Water Overlay)
- Water manning (Water Overlay)
- Manning prequel (Water Overlay)
References
- ↑ WikiEngineer (2008-2011). Manning Roughness Coefficients. Retrieved from: http://wikiengineer.com/Water-Resources/ManningRoughnessCoefficients