The user can compare the current GeoFluv™ design surface with either the Pre-Disturbed Surface or the Disturbed Surface that is toggled on in the Output tab. This feature provides a convenient means for the user to document that editing has achieved a material balance for the GeoFluv™ design.
If the user has toggled Pre-Disturbed Surface in the Output tab's Surface for Cut / Fill option, left-clicking the Update Cut / Fill button will cause Natural Regrade to compare the GeoFluv™ design surface to the Pre-Disturbed surface and calculate the volumes of cut and fill material required to construct the GeoFluv™ design from the Pre-Disturbed Surface. The results of the calculation are displayed (in English units) as cubic yards of cut, cubic yards of fill, and the percent variance of cut to fill.
If the user has toggled Disturbed Surface in the Output tab's Surface for Cut / Fill option, left-clicking the Update Cut / Fill button will cause Natural Regrade to compare the GeoFluv™ design surface to the user-selected Disturbed surface and calculate the volumes of cut and fill material required to construct the GeoFluv™ design from the Disturbed Surface. The results of the calculation are displayed (in English units) as cubic yards of cut, cubic yards of fill, and the percent variance of cut to fill.
If the cut and fill variance percentage is within the range that the user specified in the Settings, Natural Regrade Global Settings dialog box, then the Cut / Fill percent variance will be highlighted in green to quickly inform the user that they have achieved a desired material balance. If the cut and fill variance percentage is outside the user-specified range, then the Cut / Fill percent variance will be highlighted in red to alert the user that they have not achieved a desired material balance.
Some ways to quickly alter the cut / fill balance in the draft GeoFluvTM design include raising or lower ridge longitudinal profiles using the editors in Natural Regrade's dropdown menu, changing the upstream slope percent of channels in the Channels tab, and moving the channel transition point from >-0.04 reach to <-0.04 reach using the Channels tab's Advanced button.