Object flow output (Water Overlay)

Icon	Key	Unit	Range	Description	Default value
	OBJECT_FLOW_OUTPUT	m3		An array of values, each value indicating the amount of water which has flowed through this construction during each timeframe.	None

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

Invalid water objects have an Object flow output attribute value of NO_DATA: (~ -3.4+e38) for easy exporting/debugging.

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 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.