View source for Object flow output (Water Overlay)

{{Overlay attribute
|attribute=[[Object flow output (Water Overlay)|OBJECT_FLOW_OUTPUT]]
|unit=m3
|description=An [[Attribute array|array]] of values, each value indicating the amount of water which has flowed through this construction during each timeframe.
|defaultvalue=
|icon=
}}

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.

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.
 
==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.
* 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.

==How-to's==
* [[How to find the Object flow output attribute related to a specific Overlay]]
{{WaterOverlay hydraulic structure nav}}