Within GoldSim, there are two ways to introduce
mass into the system:Within GoldSim, there are two ways to introduce
mass into the system:
•An initial mass or a rate of addition of mass can be directly specified for one or more pathways in the system; and
•When using the RT Module, the user can define the properties of one or more sources, and based on their properties, GoldSim will compute rates of release of mass from the source(s) to specified pathways. (Sources are not available in the CT Module.)
Often, you can use the former method to introduce mass into your model. In many cases, however, direct specification of an initial mass or rate of release at various locations is not possible or appropriate, and explicit modeling of the source is necessary.
Note that the definition of what is meant by a “source” is completely determined by you. A “source” may represent an entire landfill, or a single buried drum; a group of leaking underground tanks or a complex engineered facility. The key point is that the source provides mass input to the pathways that then transport the mass through the system, as illustrated below.
The Source element named “Buried_Drums” provides mass input to the Cell pathway named “Soil”.
The properties of a source which you define consist of 1) the failure rate of any barriers (e.g., drums, boxes) which must fail before the species are released; and 2) the degradation rate of any matrix (e.g., cement, grout) in which the species are bound, which must degrade before the species are released.
Note: Sources are only
available within the RT Module.
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