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<br />Channel Design Ditch No. 2 <br />Use Manning's Equation <br />K D8/3 S1/2 <br />Q = <br />n <br />Q=32cfs <br />K = 2.23 <br />D/b = ("V" Ditch) <br />Side Slopes = 2.5H:1V <br />n = .025 <br />32 = 2.23 D8/3 (S)1/2 <br />.025 <br />SMax = 50% <br />SMin = 2% <br />Maximum <br />S = 50% 1.486 r2.3 (.5)1/2 <br />Vmax - .0~~ <br />D = .78' A <br />r = P <br />A = 1.51 ft.2 <br />P = 4.2 <br />r = 0.36 <br />b = 0.0' Vmax - 21.2 ft/sec <br />G_ J <br />-12- <br />