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~_ _i <br />I <br />.~ <br />J <br />---i <br />J <br />_.,.1 <br />~-', <br />i <br />_ J <br />-J <br />^~ <br />_~ <br />i <br />__.~ <br />_~ <br />,~ <br />_' -. <br />1 <br />fIl'DRAULIC COMPUTATIONS <br />Use Manning Formula: <br />Q _ A 1. 48b R2/3 S 1/2 <br />n <br />n = 0. 025 <br />1, South Branch of St. Vraira Creek Channel Relocation <br />Design for 85 cfs. <br />Minimum Channel Depth = 3' <br />S = 0. 0045 <br />At Depth of Flow of 1, 5' <br />1.486 2/3 1/2 <br />Q = 19.50 x 0.025 x 1. 165 x 0.0045 <br />At Depth of Flow of 2, 2' <br />1,486 2/3 1/2 <br />Q = 31.68 x 0.025 x 1.60 x 0.0045 <br />At Depth of Flow of 3. 0' (channel flowing full) <br />1.486 2/3 1/2 <br />Q = 48.0 x 0.025 x 2.05 x 0.0045 <br />depth <br /> <br />1;X1 l IETT. 6 <br />Sticct 1 of 4 <br />= 86 cfs <br />= 173 cfs <br />= 309 cfs <br />~~ <br />.1 <br />J <br />