Activating MT3D-USGS in GWT Model

  • Scroll to top of this topic Scroll to Top of Page

  • Print the current topic Print Topic

  • No expanding elements on this page Show/Hide Expanders

The next step is to activate MT3D-USGS and the required packages that are part of the model. The packages that need to be activated are the BTN, ADV, DSP, SSM, GCG, LKT, and SFT. You must specify one mobile species in the BTN package. Name it "Chem." On the MT3D Options tab of the BTN pane, set the mass unit to g and the minimum saturated fraction to 0.001.

Illustration of the packages to select
BTN options

In the Advection package, choose the standard finite difference option.

ADV package options

In the GCG package set the following variables.

Variable

Value

MXITER

10

ITER1

50

IPRGCG

5
GCG Options

In the SFT package, set CLOSEFF to 0.001.

SFT Options

Click OK when you have set these variables.