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PIPE DIAM. (D), VELOCTTY (�, SLOPE (S) OR FLOW (Q) <br />BASED ON MANNINGS FORMULA AND I�NOWN VARIABLES. <br />GIVEN CALCULATED <br />Q - ~ 0.55 <br />V = 2.00 <br />S = 0.50%a <br />D = 8.00 <br />n = 0.0140 <br />cfs 0.80 <br />fp 2.28 <br />0.39% <br />in 6.97 <br />cfs 69% of capacity <br />fp 1.08 2.46 fps <br />in 6.58 in <br />