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Culvert T -F5 <br />Manning's Equation <br />Flow In a 30" Half Culvert <br />Flow Depth D 0.30 <br />Slope S 0.5 <br />Mannings "N" N 0.015 <br />AREA = Number Derived in AutoCad <br />WETTED PERIMETER= (2 *Pi *r) /2 <br />Number derived in AutoCad <br />R= AREANVETTED PERIMETER <br />V= (1.49/N) *(R ^.667) *(S ^.5) = <br />Q =AXV= <br />Q REQUIRED - Peak Discharge <br />* Flow derived from culvert T =F4 & Ditch F -22 <br />Feet <br />Express as Decimal <br />Express as Decimal <br />0.34 FEET ^2 <br />1.78 FEET <br />0.19 <br />23.30 FT /SEC <br />7.92 CFS <br />5.82 CFS <br />Culvert T -F5 <br />Manning's Equation <br />Flow In a Trapezoidal "Smart Ditch" Channel <br />Depth D 0.3 <br />Feet <br />Width W 1.12 <br />Feet <br />Slope S 0.5 <br />Express as Decimal <br />Mannings "N" N 0.022 <br />Express as Decimal <br />Side Slope X 1.3 <br />Slope = X:1 <br />AREA= (W *D) +(X *D ^2)= <br />0.43 FEET ^2 <br />WETTED PERIMETER= (W) +2 *[((X *D) ^2 +D ^2) ^0.5] 2.07 FEET <br />R= AREANVETTED PERIMETER <br />0.21 <br />V= (1.49/N) *(R ^.667) *(S ^.5) = <br />16.90 FT /SEC <br />Q =AXV= <br />7.34 CFS <br />Q REQUIRED - Peak Discharge <br />5.82 CFS <br />TR -91 App. B -107 11/14 <br />