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<br />Symbol <br /> <br />Units <br /> <br />Sf <br /> <br />ft. 1ft. <br /> <br />So <br /> <br />ft. 1ft. <br /> <br />T <br /> <br />ft. <br /> <br />Taper <br /> <br />ft./ft. <br /> <br />TW <br /> <br />ft. 1ft. <br /> <br />v <br /> <br />ft./sec. <br /> <br />W <br /> <br />ft. <br /> <br />Wp <br />WW <br /> <br />ft. <br /> <br />y <br /> <br />ft. <br /> <br />Ss <br /> <br />degrees <br /> <br />St <br /> <br />degrees <br /> <br />Description <br /> <br />e <br /> <br />Slope of FALL for slope-tapered <br />inlets (a ratio of horizontal <br />to vertical) <br /> <br />Slope of natural channel <br /> <br />Depth of the depression <br /> <br />~ewall flare angle (also ___ <br />expressed liir-~cot:ai1gent of <br />the flare angle) <br /> <br />*' <br /> <br />Tailwater depth at outlet <br />of culvert referenced to <br />outlet invert elevation <br /> <br />~ <br /> <br />Mean velocity of flow <br /> <br />Width of weir crest for slope- <br />tapered inlet with mitered face <br /> <br />Top width of depression <br /> <br />e <br /> <br />Wingwall of culvert entrance <br /> <br />Difference in elevation <br />between crest and face section <br />of a slope-tapered inlet with <br />mitered face <br /> <br />Flare angles of side walls of <br />tapered inlet with respect <br />to extension of culvert side <br />wall <br /> <br />Angle of departure of the <br />top slab from a plane parallel <br />to the bottom slab <br /> <br />0:: <br /> <br />'" <br /> <br />e <br /> <br />x <br />