SCS Dimensionless Unit Hydrograph See tabulated values in Mays Table 8.8.1 From Mays, 2011, Ground and Surface Water Hydrology

Example A watershed has 40% residential (1/4 ac lots), 25% open space (good condition), 20% commercial and business (85% impervious) and 15% industrial (72% impervious) with corresponding soil groups of C, D, C and D. What is the depth of runoff from 6 in of rain Assume the rainfall occurs in a pattern of 2 in in first hour, 3 in in second hour and 1 in in third hour determine the rainfall excess hyetograph Average slope is 3%, Area is 3 mi2, hydraulic length is 1.2 mi. Determine the SCS unit hydrograph. What is the direct runoff hydrograph from the rain used earlier

Kinematic Wave Overland Flow From Mays, 2011, Ground and Surface Water Hydrology

Combination of hillslope elements into a distributed hydrologic model From Mays, 2011, Ground and Surface Water Hydrology