HY8:Roadway Data

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When defining the roadway data for the culvert, the following parameters are required:

  • Roadway Profile
  • Roadway Station
  • Crest Length
  • Crest Elevation
  • Roadway Surface
  • Top Width

The roadway elevation can be either a constant or vary with station. An initial roadway station may be defined or left at the default of 0.0. The stationing is used to position culverts along the length of the roadway profile when choosing the Front View option.

The roadway surface may be paved or gravel, or an overtopping discharge coefficient in the weir equation may be entered. Select a paved roadway surface or a gravel roadway surface from which the program uses a default weir coefficient value. If input discharge coefficient is selected, enter a discharge coefficient between 2.5 and 3.095.

The values entered for the crest length and top width of the roadway have no effect on the hydraulic computations unless overtopping occurs.


v • e
HY-8
Introduction:Getting Started   •   Layout   •   Vena Contracta   •   Building a Project   •   Locate Project   •   Culvert Crossing Data   •   Run Analysis   •   Report Generation
Crossing and Culvert Data:Crossings   •   Discharge Data   •   Roadway Data   •   Tailwater Data   •   Irregular Channel   •   Culvert Data   •   Site Data   •   Culvert Invert Data   •   Embankment Toe Data
AnalysisProject Units   •   Roadway Overtopping   •   Inlet Control Computations   •   Outlet Control Computations   •   Tables and Plots
Energy DissipationScour Hole Geometry   •   Increased Resistance   •   Tumbling Flow   •   USBR Type IX Baffled Apron   •   Drop Structures   •   Stilling Basins   •   Streambed Level Structures
MethodsAquatic Organism Passage   •   Low Flow Hydraulics
TroubleshootingDifferences from DOS HY-8   •   Limitations   •   HY-8 User Manual
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