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Exporting a HEC-HMS Model to HydroCAD

The Export HEC-HMS to HydroCAD command of GeoHECHMS allows the user to export the current HEC-HMS project to HydroCAD input data files.

The following table details the conversions that will occur when exporting a HEC-HMS model to HydroCAD:

HEC-HMS ElementsHydroCAD Elements
SubbasinSubcatchment
ReachReach
Storage AreaPond
JunctionLinkInternal (use only diagram inflows)
SourceLinkEnter hydrograph manually
Import hydrograph from a file or from another project

Follow the steps below to export a HEC-HMS model to HydroCAD:

  1. From the Input ribbon menu, click the Export Data dropdown menu and then select the Export HEC-HMS to HydroCAD command.
    Export HEC-HMS to HydroCAD ribbon menu command
  2. The Export HydroCAD Project dialog box will be displayed.
    Export HydroCAD Project dialog box
  3. From the Select HydroCAD File Type to Export section, select either of the following options:
    • HydroCAD input data files: After selecting this option, click the […] browse button to specify the directory and the file name for the HydroCAD data to be exported. By default, this option is selected.
    • HydroCAD archive (Zip) file: After selecting this option, click the […] browse button to specify the directory and the file name. All the HydroCAD project input data files will be archived into a single ZIP file.
  4. From the Select Scenario (Plans) to Export section, select either of the following options:
    • All scenarios: Select this option to export all the scenarios contained within the model. By default, this option is selected.
    • Select scenarios: Select this option to export a specific scenario. Click the dropdown combo box adjacent to this option to select the corresponding scenarios to be exported.
      Select Scenarios (Plans) to Export - Select Scenarios dropdown
  5. When all the options have been properly defined, click the [Export] button to export the HEC-HMS project to HydroCAD input data files.

About the Author Chris Maeder

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