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Standard Ditch Design <br />Page 6 <br />~ ~ 4.5 Feet <br />E q ~ /--~I <br />s/. 6 ' <br />~/ W <br />R = 0.5 (9.0) 4.5 _ 20.25 = 3.18 Ft <br />2 (4.5)2 + (4.5)2 ~ 6.36 <br />Vel = 1.486 (3.18) 2/3 (0.005) '~ 7.58 Ft/Sec <br />0.030 <br />A = 20.25 Ft2 <br />Q = (7.58) x (3.18) = 153.44 CFS <br />Q Design = 153.44 T 1.3 118.03 CFS <br />• <br /> <br />