The Contaminant Transport Tab of the Options Dialog
The Contaminant Transport tab of the Options dialog provides a number of options for controlling the way that the GoldSim Contaminant Transport Module behaves. These options are described below.
Solution Precision: This setting controls how precisely GoldSim solves the contaminant transport equations. It affects both Cell calculations and Pipe calculations. There are three options: Low, Medium (the default), and High.
Log warning messages: If this box is checked, GoldSim writes warning messages associated with the Contaminant Transport Module to the Run Log Text that is stored with a GoldSim model once it has been run. It contains basic information regarding the simulation, and any warning or error messages that were generated.. This box is defaulted on, and generally, you should not clear it, as it can be dangerous to ignore warning messages.
Disable decay of species: If this box is checked all decay rates are ignored. This is often of great value when first trying to build, test and debug a model.
Log cell-network details: If this box is checked, a large number of detailed messages regarding the cell net A network of interconnected Cell pathways that are directly linked by coupled mass flux links. calculations are written to the Run Log. This is an advanced debugging option, and generally should not be checked.
Barrier failure type: This is a list box with two options for controlling outer barrier failure in a Source. If "Predicted failure time" is selected, package failures are discretized by computing the cumulative fraction failed based on the distribution, multiplying this fraction by the total number of packages, and truncating or rounding (see below) to the nearest integer number of packages. As a result, multiple realizations of the same failure distribution will be identical. If "Random failure time" is selected, the failure time for each package is randomly sampled from the distribution. As a result, multiple realizations of the same failure distribution will be slightly different.
Round (vs truncate) the computed number of waste-package failures: This checkbox determines how outer barrier package failure is discretized (and only applies if "Predicted failure time" is selected under Barrier failure type). It is best explained using an example. Suppose you had 10 packages that failed uniformly over 10 years. If this box was checked, the first package would fail at 0.5 years, and the last package would fail at 9.5 years. If this box was cleared, the first package would fail at 1 year, and the last package would fail at 10 years.
Note: Source elements are only available in the RT Module. They are not available in the CT Module.
Display Units The units (e.g., m, g, $/day) in which an output is displayed within GoldSim.: These fields are used to specify the display units for masses in pathways, mass fluxes between pathways, and concentrations in pathways.