Allows the Volumetric Runoff Coefficient to be calculated from Land Use and Overland Slope.
As options are selected from the drop-down lists, the appropriate runoff coefficient is selected.
The runoff coefficient is calculated by looking up the values in table 1 in document Hydraulics-07-F.pdf, authored by the Oregon Department of Transportation Highway Division.
Local guidelines may differ from the calculator values. Where values differ, the locally recommended values should be used.