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• Channel Factor Channel AA-AA' <br />Q 31.38 cfs <br />Z (side slopes) 10:1 <br />Shape Trapezoidal <br />n 0.030 <br />Limiting Velocity 5.0 fps <br />Slope 0.0413 ff/ft <br />r1 <br />Results <br />Normal Depth (dn) 0.37 ft <br />Flow velocity 4.58 fps <br />Channel width 15 ft <br />Results <br />Based on the above results, the reclaimed drainage channel will have a minimal width of 15 feet and <br />gently sloping sides. The bottom will be relatively flat with minute channeling. Added rock may be <br />placed for energy dissipation. A trapezoidal channel with a minimum bottom width of 15 feet and <br />10h:ivorflattersideslopesandnofreeboardsimulatesthiscondition. The actual widthwillvaryfrom <br />15 feet up to 100+feet. This typical cross section or one with the same or larger cross sectional area, <br />will be used for the entire channel reach. This will insure that the velocity will be below the limiting <br />velocity of 5.0 fps, since the peak flow was determined at the downstream end of the reclaimed <br />drainage channel. No free board was calculated because minimal, if any damage will occur if the flow <br />does leave the banks for short periods of time. <br />The reclaimed drainage channel will be topsoiled and revegetated according.o Section 2.05.4(2)(d) <br />and (e). <br />(Revised 2/00) ATTACHMENT 2.05.4(2)(c) - 1-2 <br />