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Allows the Volumetric Runoff Coefficient to be calculated from Land Use and Overland Slope


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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.