GMS:BCT Process

Example of the BCT Process dialog

The Block Centered Transport (BCT) package is needed if transport or density dependent flow is to be included in the model.

The BCT Process dialog is divided into two parts: one on the left which shows the main sections, and one on the right which shows the inputs for the current section.

Comments

Comment lines can be added and will appear at the top of the BCT file. Use the Add Row button to create comments. Comments can be removed using the Delete Row button.

Variables

Variables corresponding to item 1a in the BCT input file.

• Transport simulation flag (ITRNSP)
• Cell-by-cell mass flux unit (IBCTCB)
• Number of mobile species (MCOMP)
• Transport active domain (ICBNDFLG)
• Advective term (ITVD)
• Transport solution scheme (ICT)
• Inactive node concentration (CINACT)
• Concentration convergence tolerance (CICLOSE)
• Dispersion formula (IDISP)
• Cross dispersion (IXDISP)
• Molecular diffusion coeff (DIFFNC)
• Zero order decay (IZOD)
• First order decay (IFOD)
• Flux mass balance errors (IFMBC)
• Flow imbalance unit (MBEGWUNF)
• Mass imbalance unit (MBEGWUNT)
• Flow imbalance unit for CLN (MBECLNUNF)
• Mass imbalance unit for CLN (MBECLNUNT)

Species

The list of species. The number of species equals MCOMP in the Variables section. GMS allows you to give each species a name.

Aquifer Properties

Cell-by-cell inputs independent of species such as porosity.

Species Properties

Cell-by-cell inputs that depend on the species, such as adsorption.

DDF Comments

Comment lines can be added and will appear at the top of the DDF file.

DDF Package

Inputs corresponding to the DDF (Density Driven Flow) package.