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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 ???. 

//Curve Numbers are calculated by looking up the values in the tables 2-2a to 2-2d in document  TR-55.pdf, authored by Natural Resources Conservation Service (NRCS). TR-55 is a widely used approach to hydrology in the US.