Some groundwater-modeling programs, benefit from keeping the contrast in the width of adjacent cells less than a value of 1.5 (Anderson and Woessner, 1991). The Grid|Smooth Grid… menu item is designed to facilitate creating grids that meet this criterion. In PHAST, contrasts in element size are not an issue, but it still can be useful to have an area with a refined grid where results need to be more accurate. When the user selects this menu item, the Smooth Grid dialog box will appear in which the user can specify whether to adjust the row, column, or layer spacing to meet the criterion. The Grid smoothing criterion is the maximum ratio between adjacent rows, columns, or layers that will be accepted. The default value is 1.2, which is well below the usual limit. After making the desired selections, the user can click the OK button to adjust the grid spacing. Column, row, or layer boundaries will be moved to meet the grid smoothing criterion but no new columns, rows, or layers will be created.
This method can not be used with Footprint grids because the cell spacing is required to be uniform.
