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Open Channel Calculation - Trapezoidal Design <br /> Project: HARNEY LANE LANDFILL <br /> DESCRIPTION: CLOSURE DRAINAGE CALCULATIONS <br /> CALLS. ARE BASED ON MANNINGS FORMULA <br /> Notes: CAPACITY OF V-DITCH 1.26 ' DEEP & 10' TOP <br /> n VALUE: 0.030 <br /> (SLOPE) : 0.0030 <br /> a/c (RATIO TO 1 ) : 4.00 <br /> DEPTH: 1.26 Ft. <br /> BOTTOM WIDTH: 0.00 Ft. <br /> Top Width: 10.00 Ft. <br /> -------------------------------------------------------------------- <br /> Area: 6.25 Sq. Ft. <br /> Wetted Perimeter; 10.31 Ft. <br /> Hydraulic Radius; 0.6063 <br /> R' (2/3) : 0.7164 <br /> Velocity: 1.9436 fps <br /> Flow Quantity: 12.1472 cfa <br />