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<br />C~ <br />' • <br /> <br />N = 0.040 <br />R = Area/Wetted Perimeter <br />A = area <br />S = 0.02 min. <br />Manning's Equation <br />2.5h:1V 20h:1V <br />Flow Related to Depth <br />@d = 5" Q = .3.6 CFS <br />@d 6" Q = 5.8 CFS <br />The 4.1 CFS will flow between 5" and 6" deep in the bench drains. <br />(New 10-31-90) <br />CRDA3 - 12 <br />