Input interpretation
Manning formula
Equation
v = (1 m^(1/3)/s (A/P)^(2/3) sqrt(S))/n | Q = A v | v | flow velocity of fluid A | flow area n | Manning's roughness coefficient P | wetted perimeter S | hydraulic grade line slope Q | flow rate (velocity for open-channel flow)
Input values
flow area | 202.5 m^2 (square meters) Manning's roughness coefficient | 0.014 wetted perimeter | 9.5 meters hydraulic grade line slope | 0.00012
Result
flow velocity of fluid | 6.015 m/s (meters per second) = 13.46 mph (miles per hour) = 19.74 ft/s (feet per second) = 71048 ft/h (feet per hour) = 21.66 km/h (kilometers per hour) = 519.7 km/day (kilometers per day) flow rate | 1.218×10^6 L/s (liters per second) = 1218 m^3/s (cubic meters per second) = 38.41 km^3/yr (cubic kilometers per year)