Hydraulics and sanitation
Trapezoidal or rectangular channel (Manning)
Formulas
A = (b + z y) y
P = b + 2 y √(1 + z²)
V = (1/n) (A/P)^(2/3) I^(1/2) ; Q = V A
Fr = V / √(g A / T), T = b + 2 z y
Trapezoidal or rectangular channel (Manning)
Fill in the inputs and run the calculation: results and every intermediate step will appear here.
These tools provide estimates and calculation aids. They are neither design calculations nor an engineering approval: any design or safety decision must be checked by a qualified professional against the applicable standards.
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