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Open Channel Calculation - Trapesoidal Design <br /> Project; HARNEY LANE LANDFILL <br /> DESCRIPTION; CLOSURE DRAINAGE CALCULATIONS <br /> CALLS. ARE BASED ON MANNINGS FORMULA <br /> Notes; CAPACITY OF V-DITCH 1.251 DEEP & 12.51 TOP <br /> n VALUE: 0.030 <br /> s (SLOPE) ; 0.0020 <br /> s/s (RATIO TO 1 ) ; 5.00 <br /> DEPTH; 1.25 Ft. <br /> BOTTOM WIDTH; 0.00 Ft. <br /> Top Width; 12.50 Ft. <br /> --- --- <br /> Area: 7.81 Sq. Ft. <br /> Wetted Perimeter; 12.75 Ft. <br /> Hydraulic Radius; 0.6129 <br /> R' (2/3 ) ; 0.7215 <br /> Velocity ; 1.5983 fps <br /> Flow Quantity; 12.4864 eta <br /> 3 c� <br />