Open Channel Geometry

Units: Any units may be used so long as they are consistent. (L) means that the variable has units of length (e.g. meters). (L²) means that the variable has units of length squared (e.g. m²).

Open Channel Diagram and Equations

Open Channel Cross-Sections

In an 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.

Equations (note that R=A/P):
Open Channel Equations

The non-circular open channel geometry calculation does not check for unreasonable inputs. Please enter positive values.

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Select open channel:
	Depth, y (L):
	Bottom Width, b (L):
www.LMNOeng.com	Side Slope, z (H:V):
	Area, A (L²):
© LMNO Engineering,	Wetted Perimeter, P (L):
Research, and Software, Ltd.	Hydraulic Radius, R (L):
	Top Width, T (L):