GMS:Map to Models

Map to MODFLOW

See Map to MODFLOW

Map to FEMWATER

Once the 3D mesh is constructed, the final step in converting the FEMWATER conceptual model to a mesh-based numerical model is to select the Map → FEMWATER command in the Feature Objects menu. This command assigns the wells, boundary conditions, and recharge zones assigned to the points, arcs, and polygons in the conceptual model to the nodes and element faces of the 3D mesh. At this point, the basic analysis options (steady state vs. transient, output control, material properties, etc.) must still be assigned using the tools in the FEMWATER menu. Once these basic options have been assigned, the model can be saved and FEMWATER can be launched.

Map to MT3DMS

After the conceptual model is constructed, the Map → MT3DMS command can be used to convert the conceptual model to an MT3DMS numerical model. Before the Map → MT3DMS command can be selected, the MT3DMS data must be initialized. The MT3DMS data are initialized with the following steps

1. Switch to the 3D Grid module
2. Select the New Simulation command from the MT3D menu.
3. Open the Basic Transport Package dialog and set up the stress periods the user wishes to use in the simulation.

Once the MT3DMS data are initialized, the Map → MT3DMS command becomes undimmed and can be selected.

Because MT3DMS already assumes a default concentration of zero for an unspecified point source sink, GMS does not create a source/sink if the concentration for the feature object has been specified as a constant value of zero.

Related Topics

• Map to MODFLOW