public static Hydrograph CalculateSbuhPr(Catchment catchment)
{
//Define design storms
RainfallEvent pollutionReduction = RainfallEvent.GetScsOneAEvent("Pollution Reduction", 0.83);
Hydrograph imperviousHydrographPR = SantaBarbaraUrbanHydrograph.CalculateHydrograph
(catchment, pollutionReduction);
return imperviousHydrographPR;
}