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i <br /> 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 A V-DITCH .5 ' DEEP 10' TOP <br /> n VALUE: 0.030 <br /> s (SLOPE) : 0.0010 <br /> a/c (RATIO TO 1 ) : 10.00 <br /> DEPTH: 0.50 Ft. <br /> BOTTOM WIDTH: 0.00 Ft. <br /> Top Width: 10.00 Ft. <br /> -----------------Area: <br /> ----------------2.50-Sq.-Ft.------------------ <br /> Wetted Perimeter: 10.05 Ft. <br /> Hydraulic Radius: 0.2488 <br /> R' (2/3) : 0.3955 <br /> Velocity: 0.6195 fps <br /> Flow Quantity: 1.5488 afa <br /> 1q <br />