Defining Decay Rates that Vary by Location

In general, the properties of a Species element must, by definition, be constant throughout your model (e.g., you would not want the Molecular Weight of a species to take on different values in different locations in your model!). There are situations, however, in which you may wish to vary the Decay Rate or the stoichiometry for a species spatially in your model (i.e., have it take on different values at different locations in your model). For example, you may want a species to decay only in certain pathways (e.g., a pathway representing anoxic sediments; or a pathway representing the liver in a pharmacokinetic model).

GoldSim provides a mechanism for representing such behavior.