5. The inflow hydrograph to a rectangular channel is tabulated below. The channel has a width of 100 ft, a bottom slope of 0.001, and Manning n of 0.035. The length of the channel is L = 30,000 ft. Using the kinematic wave, obtain the outflow hydrograph. (KB.6) Time (min) Inflow (cfs) 0 2500 2280 2500 40 3500 60 4500 80 5500 100 6500 120 5000 140 4000 160 3000 180 2000 200 2000 220 2000