Tracer ABCD (Water Overlay)

Attribute	Unit	Description	Default
SUBSTANCE_A	x/m²	The amount of substance A created per second per m² in this location.	0
SUBSTANCE_B	x/m²	The amount of substance B created per second per m² in this location.	0
SUBSTANCE_C	x/m²	The amount of substance C created per second per m² in this location.	0
SUBSTANCE_D	x/m²	The amount of substance d created per second per m² in this location.	0

Chemical emitters/decomposers

Chemical emitters are constructions which produce specific chemicals. The net amount of chemicals a single construction creates is spread out across it's surface. After the chemicals are created, any water flowing through the same location will carry a part of the chemicals with it.

Chemicals have generic definitions, in terms of name and magnitude, to allow for the modeling of arbitrary substances.

Structures which are defined to create a negative amount of chemicals function as a scrubber or decomposer, removing the specified quantity of chemicals from the hydrological model.

In situations where water is absent, chemicals cannot move between cells.

Chemical emitters's attributes do not take the form of function values and must be added manually or as part of loading in geodata.