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Open Channel Calculation - Trape2oidal Design <br /> Project: HARNEY LANE LANDFILL <br /> DESCRIPTION: CLOSURE DRAINAGE CALCULATIONS <br /> CALLS. ARE BASED ON MANNINGS FORMULA <br /> Notes: CAPACITY OF A V-DITCH .5 ' DEEP 8 ' TOP <br /> n VALUE: . 0.030 <br /> s (SLOPE) s 0.0020 <br /> a/c (RATIO TO 1 ) : 8.00 <br /> DEPTH: 0.60 Ft. <br /> BOTTOM WIDTH: 0.00 Ft. <br /> Top Width: 8.00 Ft. <br /> -----------------Area: <br /> ----------------2.00-Sq.-Ft.------------------ <br /> Wetted Perimeter: 8.06 Ft. <br /> Hydraulic Radius: 0.2481 <br /> R' (2/3) : 0.3948 <br /> Velocity: 0.8746 fps <br /> Flow Quantity : 1.7491 cfs <br /> 2� <br />