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<br />. <br /> <br />AUTOMATIC COMPUTATION OF STAGE-DISCHARGE RELATIONS AT Cl'LVI.:nTS 25 <br /> <br />..- <br /> <br />SYMBOLS AND UNITS--Continued <br /> <br />Definition <br /> <br />Bed slope of culvert barrel. <br /> <br />Subarea (used on card 3). <br /> <br />Width of a section at the water surface. <br /> <br />Type of culvert barrel (used on card 9): use integer <br />1 for a circular pipe, 2 for a box, or 3 for a pipe- <br />arch. <br /> <br />Mean. velocity of flow in a section. <br /> <br />Full culvert velocity. <br /> <br />Interval between water- surface elevations for which <br />approach section properties are computed. <br /> <br />Highest water- surface elevation to be computed for <br />the approach section. <br /> <br />Lowest water- surface elevation to be used in comput- <br />ing section properties of the approach section. <br /> <br />An integer, 0 to 9. specifying the number of vertical <br />webs in the barrel of a box culvert (used on card 9). <br /> <br />w Measure of the length of a wingwall or chamfer. <br /> <br />Symbol' <br /> <br />S <br />o <br />SA <br /> <br />T <br /> <br />T . TC <br />c' <br /> <br />v <br /> <br />v <br />o <br />AW; DELTA-W <br /> <br />W ; WMAX <br />max <br /> <br />W'WO <br />o' <br /> <br />WEB <br /> <br />x Length of part-full flow. <br /> <br />z; Z Difference in invert elevations between inlet and outlet <br />of culvert. <br /> <br />z elevation; Z ELEV Elevation of the upstream invert of the culvert barreL <br /> <br />1, 2 <br /> <br />; Subscripts which denote the location of cross sections <br />or section properties in downstream order. <br /> <br />Velocity- head coefficient. <br /> <br />Acute angle between a wingwall and plane of contraction <br />or headwall: and the bevel angle. <br /> <br />"': ALPHA <br />e <br /> <br />< <br /> <br />Less than. <br />Equal to or less than. <br />Greater than. <br />Equal to or greater than. <br /> <br />" <br /> <br />> <br /> <br />" <br /> <br />.Text symbol precedes printout symbol if both are shown. <br /> <br />Units <br /> <br />ft <br /> <br />ftl see <br />ftl see <br />ft <br /> <br />ft <br /> <br />ft <br /> <br />ft <br />ft <br />ft <br /> <br />ft <br />