Extracted text: Q5: Using the ordinate of a 9-hr unit hydrograph given below, compute the ordinate of a 3-hr unit hydrograph using S-curve method/ Time (hr) 0 9hr-UH (m'/s) 3. 6. 9. 12 15 18 21 24 27 30 33 36 39 0. 6.7 33.3 76.7 120 136.7 123 3 90.7 56.3 31.3 15.7 6.7 1.7 19