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what is manning equation. R is now given an exponent of 23 as Manning noted that R exponent values typically ranged close to that value. V k n R h 2 3 S 1 2.
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This form of the equation is for SI units. Mannings n for Channels Chow 1959. The factors used in Mannings equation are as follows.
Where n is the coefficient of roughness in the GanguilletKutter formula.
Q1486AR 23 S 12n. Result will be displayed. The waters velocity in cubic feet per second The area of the flow in square feet. When Mannings C is used in the Chezy formula the Manning equation for flow velocity in an open channel results.
