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<br />GLOSSARY (Cont.)
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<br />Headwater elevation required for culvert to pass flow in inlet control, ft
<br />Headwater elevation required for culvert to pass flow in outlet control, ft
<br />Headwater elevation required for flow to pass throat section in throat control, ft
<br />Invert elevation at outlet, ft
<br />Stream bed elevation at face of culvert, ft
<br />Stream bed elevation at outlet of cui vert, ft
<br />Invert elevation at throat, ft
<br />Tailwater elevation, ft
<br />Darcy resistance factor
<br />Froude number
<br />Depression of inlet control section below the stream bed, ft, (Measured from stream bed
<br />to face invert for culvert, to throat invert for culvert with tapered inlet.)
<br />The number of different materials (roughnesses) in the perimeter of a conduit with
<br />composite roughness
<br />Acceleration due to gravity, 32.2 fists
<br />Hydraulic grade line
<br />Height of hydraulic grade line above centerline of orifice, ft
<br />Friction head loss, ft
<br />Height of hydraulic grade line above outlet invert, ft
<br />Height of tailwater above crown of submerged road, ft
<br />Sum of inlet loss, friction loss, and outlet loss in a culvert, ft
<br />Total energy required to pass a given discharge through a culvert, ft
<br />Head loss at bend, ft
<br />Specific head at critical depth (do + Vo 212g), ft
<br />Entrance head loss, ft
<br />Friction head loss in culvert barrel, ft
<br />Head loss at bar grate, ft
<br />Head loss at junction, ft
<br />Friction head loss in tapered inlet, ft
<br />Exit head loss, ft
<br />Velocity head = V212g, ft
<br />Depth from inlet invert to upstream total energy grade line, ft
<br />Headwater depth above the bend section invert, ft
<br />Headwater depth above the weir crest, ft
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<br />xvi
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