Template:MODFLOW-USG Regional to Local Workflow

1. Begin with an existing regional MODFLOW-USG project.
The existing regional model can be created using the conceptual model or grid based approach.

2. Create a UGrid.

1. Create a new UGrid. 1. Create a new 3D UGrid. Right-click in the Project Explorer and select New | UGrid 3D.... In the New UGrid dialog, enter the information for the X-, Y-, and Z-Dimension of the grid. 2. Create a new 2D UGrid. Right-click in the Project Explorer and select New | UGrid 2D.... In the New UGrid dialog, enter the information for the X- and Y-Dimension of the grid. 3. Create a UGrid using a grid frame. Right-click in the Project Explorer and select the New | Grid Frame... command. Using the Select Grid Frame tool, right-click on the grid and select the Fit to Active Coverage command. Select the Feature Objects | Map → UGrid... menu command. In the Map → UGrid dialog, enter parameters for the UGrid. This includes complex stratigraphy such as: Quadtree UGrids Voronoi UGrids VTK Unstructured Grids 2. Convert an object into a UGrid. 1. Convert a 3D grid to a 3D UGrid. Right-click in the 3D grid item in the Project Explorer and select Convert To | UGrid.... 2. Convert a shapefile to a UGrid. Right-click in the shapefile item in the Project Explorer and select Convert To | UGrid.... To convert the new 2D UGrid into a 3D UGrid: Right-click on the 2D UGrid item and select the Extrude Down to 3D UGrid command. Enter 3D parameters in the Thickness dialog. 3. Convert map layers to a UGrid. Right-click in the Project Explorer and select the New | Grid Frame... command. Using the Select Grid Frame tool, right-click on the grid and select the Fit to Active Coverage command. Select the Feature Objects | Map → UGrid... menu command. In the Map → UGrid dialog, enter parameters for the UGrid. 4. Convert horizon to a UGrid. Select the TINs | Horizons → UGrid... menu command. Use the Horizons to UGrid wizard to generate the UGrid.