Discharge area (Watershed Overlay)

Icon	Key	Unit	Range	Description	Default value
	DISCHARGE_AREA	boolean by presence		Identifies the Area as a unique discharge area.	n/a

Discharge areas represent regions where rain water ends up and potentially enters the water management system to be discharged.

Notes

A discharge area always forms the basis of a watershed. Directional water flow, or the gradient of the terrain depending on the discharge method, is backtracked to determine the watershed for a particular discharge area.
When multiple areas overlap for a particular grid cell, only the first encountered discharge area is used.
We added an initialization step in which water cells that are not yet assigned to any discharge area are automatically assigned to one when they are connected as a neighbor or by a culvert.