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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: FIND CAPACITY OF V-DITCH .5 ' DEEP & 6 ' TOP <br /> n VALUE: 0.030 <br /> s (SLOPE) : 0.0020 <br /> c/o (RATIO TO 1 ) : 6.00 <br /> DEPTH: 0.50 Ft. <br /> BOTTOM WIDTH: 0.00 Ft. <br /> Top Width: 6.00 Ft. <br /> Area: 1.50 S . Ft. <br /> Wetted Perimeter: 6.08 Ft. <br /> Hydraulic Radius: 0.2466 <br /> R' (2/3) : 0.3932 <br /> Velocity: 0.8711 fps <br /> Flow Quantity: 1.3066 cfs <br /> 2 3 <br />