Problem #4: (a) Compute the Unit Hydrograph for the Effective rainfall-direct runoff storm as sum...

Problem #4: (a) Compute the Unit Hydrograph for the Effective rainfall-direct runoff storm as summarized below. 1.00 pm Time (Hours) 10.00 am Effective Rainfall intensity (cm/hour) 10.00 Direct Runoff Rate (cm/hour) 0.0 11:00 am 0.0 10.00 0.0 (b) For a watershed comprising of 5220 hectares in area, the rainfall and runoff data are summarized below in the Table. The maximum runoff rate was recorded as 4.82 m/s at hour 9 on the second day. Compute (a) a 6-hr Unit Hydrograph, (b) a 12-hr unit hydrograph, and (c) a runoff hydrograph for the complex rain sequence as: 6-hr rainfall with rainfall intensity of 2 mm/hr, followed by 6-hr rainfall with rainfall intensity of 7 mm/hr, and the last 6-hr rainfall with rainfall intensity of 11 mm/hr. (d) Determine the maximum runoff rate for the complex rain storm described in part-c. Rainfall Data Day Hour Intensity (mm/hr) Day-1 20 21 22 23 0.5 0.5 0.5 2.7 24 Day-2 1 2 3 4 5.2 1.7 1.3 1.1 5 1.3 1.0 Runoff Data Day Hour Intensity (m/s) 8 12 0.56 0.61 Day-1 Day-2 16 20 24 4 8 12 16 20 24 0.61 0.590.66 3.35 4.75 4.25 2.40 1.25 1.10 Runoff Data Day Hour Intensity (m/s) Day-3 Day-4 4 8 12 16 20 24 4 8 12 16 20 24 0.94 0.89 0.84 0.79 0.74 0.70 0.68 0.65 0.64 0.62 0.590.59