Instantaneously Moving Mass from a Source

In some situations, you may wish to instantaneously move mass from a Source (e.g., a consequence of a disruptive event of some sort). This can be accomplished in two ways:

• Moving mass from an Associated Cell: You could decrement the mass in an Associated Cell by specifying a negative Discrete Change. You could then increment the mass in a Cell at some other location in the system by the same amount in order to represent the discrete movement of the mass. For example, you could move half of the exposed mass in one associated Cell to another Cell on the ground surface.

• Moving Unexposed Mass in a Source: By referencing the "Unexposed_Mass" output, you could increment the amount of mass in a Cell at some other location in your system by some fraction of the amount of unexposed mass in the Source. Note, however, that GoldSim does not provide a way for you to discretely decrement the amount of unexposed mass. Hence, this approach should only be used if the fraction of unexposed mass being moved is small relative to the total amount of unexposed mass (otherwise, you will create mass in your system).