In many cases, you will want the properties of the environmental media in your model to vary spatially. For example, the solubility for a species in Water or the partition coefficient for a species in Sand may take on different values in different locations (pathways) in your model.
GoldSim provides a mechanism for representing such behavior. In general, it involves either using different media in different locations (e.g., defining two types of Sand) or creating "clones" of a single medium, which take on different values in different locations.
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