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Standard Ditch Design <br />Page 5 <br />3.5 meet <br />I` 7.0 _~ <br />s AI' <br />1 <br />~~ 3.s~ <br />~ l <br />R 0.5 (7.0) 3.5 12.25 = 1.24 Ft. <br />2 (3.5)2 + (3.5)2 ~ 9.90 <br />Vel = 1.486 (1.24) 2/3 (0.005) '~ = 4.04 Ft/Sec <br />0.030 <br />A = 12.25 Ft 2 <br />Q = (12.25) X (4.04) = 49.49 CFS <br />Q Design = 49.49 - 1.3 = 38.07 CFS <br />• <br />4.0 Feet <br />S.o'. <br />9 <br />~~ ~,oi <br />R __ 0.5 (8.0) 4.0 __ 16.00 _ 1.41 Ft <br />2 (4)2 ~ 11.31 <br />Vel = 1.486 (1.41) 2/3 (0.005) ~S 4.40 Ft <br />0.03 <br />A = 16.00 Ft2 <br />Q - (4.40) x (16100) = 70.40 CFS <br />Q Design = 70.40: 1.3 = 54.15 CFS <br /> <br />