public static Hydrograph CalculateSbuh10Year(Catchment catchment)
{
//Define design storms
RainfallEvent rainfallEvent = RainfallEvent.GetScsOneAEvent("Ten-Year", 3.4);
Hydrograph imperviousHydrograph = SantaBarbaraUrbanHydrograph.CalculateHydrograph
(catchment, rainfallEvent);
return imperviousHydrograph;
}