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Manning's Equation;6"Pipe @ 2.0%=0.849 cfs <br /> Q= 1.486/n *A* R 2/3*S 1/2 <br /> n= roughness coefficient=0.012 <br /> A=cross sectional area of pipe=rt(D/2)2=it(0.50 ft/2)2=0.196 <br /> R= hydraulic radius of pipe <br /> S=slope <br /> R2/3=(D/4)2"3=(0.50/4)2/3=0.25 <br /> S1/2=(0.02 ft/ft)1/2=0.141 <br /> Q=(1.486/0.012) * 0.196* 0.25 *0.141=0.849 cfs <br /> 1/3JOB#19-336 <br /> MAPLE ST <br /> Storm Drainage Report 6.2 <br />