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Ditch 3 <br /> Drainage Area = 1.5 Acres <br /> CN = 90 <br /> Peak Flow(2) = 6.0 CFS <br /> Use a 1' deep 1.5H:1 V V-ditch <br /> Q = 1.486/n AR2/3 sy2 <br /> s = 0.037 <br /> A = 1.5 Ft.2 <br /> r = 0.4 Ft. <br /> n = 0.04 <br /> V = 4.52 FPS <br /> Q = 6.78 CFS <br /> Ditch R5-A <br /> Inflow = 2.0 CFS <br /> Use a 11 deep 1.5H:1V V-ditch <br /> Q = 1.486/n Ar2/3 SY2 <br /> s = 0.01% <br /> A = 1.5 Ft.2 <br /> r = 0.4 Ft. <br /> n = 0.04 <br /> V = 2.0 FPS <br /> Q = 3.0 CFS <br /> Ditch R7-A <br /> Drainage Area = 3.4 Acres <br /> CN = 85 <br /> Peak Flow 2 = 14.5 CFS <br /> Use a 1.5 deep, 2H:1 V V-ditch <br /> s = 0.058 <br /> A = 4.5 Ft.2 <br /> r = 0.67 Ft. <br /> n = 0.04 <br /> V = 4.8 FPS <br /> Q = 21.8 CFS <br /> -3- <br />