Water, at 20C, is flowing steadily in a 0.4-m-wide rectangular open channel, made of corrugated Metal stormdrain, on a slope that drops 0.5m over a run of 4500 m. If the flow depth is 0.15 m, determine the flow velocity and if the flow is subcritical or supercritical. Also determine the alternate flow depth if the character of flow were to change. Assume maximum stress conditions for the fluid. Calculate: a) Normal discharge b) Regimen C) Froude number