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Open Channel Calculation - Trapezoidal Danign <br /> Project: HARNEY LANE LANDFILL <br /> DESCRIPTION: CLOSURE DRAINAGE CALCULATIONS <br /> CALCS. ARE BASED ON MANNINGS FORMULA <br /> Notes: CAPACITY OF A V-DITCH 3 ' DEEP & 2 : 1 SIDE SLOP <br /> n VALUE: 0.030 <br /> s (SLOPE) : 0.0020 <br /> a/c (RATIO TO 1 ) : 2.00 <br /> DEPTH: 3.00 Ft. <br /> BOTTOM WIDTH: 0.00 Ft. <br /> Top Width: 12.00 Ft. <br /> :-----------------Area ----------------18.00-Sq.-Ft--------------------Area <br /> Wetted Perimeter: 13.42 Ft. <br /> Hydraulic Radius: 1 .3416 <br /> R^ (2/3) ; 1 .2164 <br /> Velocity: 2.6947 fps <br /> Flow Quantity: 48.6043 cfe <br /> 3 `J <br />