Three storms each of 6-h duration and having rainfall excess values of 3.0, 2.0 and 1.5 inch respectively occur successively. The sequence of rainfall events follows: first: 3.0 inch; second: 2.0 inch and third: 1.5 inch. The 6-h unit hydrograph for the catchment is provided, calculate the resulting DRH. If the baseflow is 10m3/s, then derive the streamflow hydrograph. Time (h) 0 3 6 9 12 15 18 24 30 36 42 48 54 60 69
UH ordinates (m3 /s) 0 25 50 85 125 160 185 160 110 60 36 25 16 8 0