Object flow output (Water Overlay): Difference between revisions

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This attribute is automatically created for all relevant hydraulic structures in a project when a [[Water Overlay|water calculation]] is performed. When the calculation completes the value is updated automatically.
This attribute is automatically created for all relevant hydraulic structures in a project when a [[Water Overlay|water calculation]] is performed. When the calculation is complete, the attribute is updated automatically.


For [[Point-based construction (Water Overlay)|point-based construction]]s, a positive value means a net amount of water was added to the surface. A negative value means a net amount of water was removed from the surface. For [[Line-based construction (Water Overlay)|line-based construction]]s, positive or negative indicates the net direction the water has flowed.
For [[Point-based construction (Water Overlay)|point-based construction]]s, a positive value means a net amount of water was added to the surface. A negative value means a net amount of water was removed from the surface. <br>
For [[Line-based construction (Water Overlay)|line-based construction]]s, positive or negative indicates the net direction the water has flowed.


Invalid water objects have an Object flow output attribute value of {{no data attribute}} for easy exporting/debugging.
All [[Hydraulic_structures_(Water_Overlay)|hydraulic structures]] have an OBJECT_FLOW_OUTPUT attribute.
Also a [[Breach_(Water_Overlay)|breach area]] and a [[Sewer_area_(Water_Overlay)|Sewer area]] have this attribute.


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* This attribute does not need to be created when configuring the project. This attribute is created automatically by the [[Water Overlay]] when a calculation is performed.
* This attribute does not need to be created when configuring the project. This attribute is created automatically by the [[Water Overlay]] when a calculation is performed.
* Each [[Water Overlay]] will create this attribute with the [[ID]] of an Overlay appended to it, to prevent the results of multiple Water Overlays storing their results in the same attribute by default.
* Each [[Water Overlay]] will create this attribute with the [[ID]] of an Overlay appended to it, to prevent the results of multiple Water Overlays storing their results in the same attribute by default.
* Invalid water objects have an Object flow output attribute value of {{no data attribute}} for easy exporting/debugging.
* The value is stored per [[Timeframes (Water Overlay)|timeframe]] and represents the amount of water transported in m³ for the period of that timeframe. Therefore the total object flow during the entire simulation can be computed as the sum of the individual values per timeframe.
* The value is stored per [[Timeframes (Water Overlay)|timeframe]] and represents the amount of water transported in m³ for the period of that timeframe. Therefore the total object flow during the entire simulation can be computed as the sum of the individual values per timeframe.
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Revision as of 10:18, 3 March 2021

This attribute is automatically created for all relevant hydraulic structures in a project when a water calculation is performed. When the calculation is complete, the attribute is updated automatically.

For point-based constructions, a positive value means a net amount of water was added to the surface. A negative value means a net amount of water was removed from the surface.
For line-based constructions, positive or negative indicates the net direction the water has flowed.

All hydraulic structures have an OBJECT_FLOW_OUTPUT attribute. Also a breach area and a Sewer area have this attribute.

Notes

  • This attribute does not need to be created when configuring the project. This attribute is created automatically by the Water Overlay when a calculation is performed.
  • Each Water Overlay will create this attribute with the ID of an Overlay appended to it, to prevent the results of multiple Water Overlays storing their results in the same attribute by default.
  • Invalid water objects have an Object flow output attribute value of NO_DATA: (~ -3.4+e38) for easy exporting/debugging.
  • The value is stored per timeframe and represents the amount of water transported in m³ for the period of that timeframe. Therefore the total object flow during the entire simulation can be computed as the sum of the individual values per timeframe.

How-to's

See also

  • Analyses of a pinching culvert (Dutch only)