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Open Channel Calculation - Trapezoidal Design <br /> Project: HARNEY LANE LANDFILL <br /> DESCRIPTION: CLOSURE DRAINAGE CALCULATIONS <br /> CALCS. ARE BASED ON MANNINGS FORMULA <br /> Notes: CAPACITY OF A V-DITCH 3.5 ' DEEP & 2 : 1 SIDE SL <br /> n VALUE: 0.030 <br /> s (SLOPE) : 0.0020 <br /> c/o (RATIO TO 1 ) : 2.00 <br /> DEPTH: 3.50 Ft. <br /> BOTTOM WIDTH: 0.00 Ft. <br /> Top Width: 14.00 Ft. <br /> -----®Area: <br /> ---------------24.50®Sq. Ft.------------------ <br /> Wetted Perimeter: 15.65 Ft. <br /> Hydraulic Radius: 1.5652 , <br /> R" (2/3) : 1.3481 <br /> Velocity: 2.9864 fps <br /> Flow Quantity : 73.1656 cfs <br /> 3a <br />