! Two rainfall storms of magnitude 4 cm occurring on two consecutive 6- hr durations on a catchment of area 21 km2 produced the following hydrograph. Estimate the rainfall excess and op index for the peak value. Then convert it to unit hydrograph. Then find the peak discharge at 12-hr UH, and answer * the followings T, hr Q, m3/s 0 4 4 8 27 40 Infiltration index, cm/hr cm Rainfall, Peak flow of 12-hr UH, m3/sec Peak flow of 6-hr UH, m3/sec Time of 16 20 24 28 44 30 26 12 60 52