Open Channel 
Open channel hydraulic radius, wetted perimeter, area 

Open channel units: Any units in the open channel calculator may be used, so long as they are consistent. (L) means that the variable has units of length (e.g. meters). (L^{2}) means that the variable has units of length squared (e.g. m^{2}) in the open channel calculator. Open Channel Diagram and Equations: In open channel, z is side slope of trapezoidal and triangular channels, defined as horizontal to vertical ratio. Both sides of the open channel are assumed to have the same side slope. Open Channel Equations (note that R=A/P): The noncircular open channel geometry calculation does not check for unreasonable inputs. Please enter positive values.
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To: LMNO Engineering home page (more calculations) Design of Trapezoidal Open Channels Calculator Design of Rectangular Open Channels Calculation
