How to Import a HEC-2 Model in HEC-RAS?

The software can import HEC‑2 models with the same import capabilities that the Army Corps of Engineers HEC‑RAS software provides.

Follow these steps to import a HEC‑2 model:

  1. From the Input ribbon menu, select Import Data and then the Import HEC‑2 Project command.Import a HEC-2 Model in HEC-RAS
  2. The Import HEC‑2 Project dialog box will appear.Import HEC-2 Project into HEC-RAS dialog box
  3. Click the […] file browse button to select the HEC‑2 data file to import. The software will display the Import HEC‑2 Data File dialog box. After selecting the HEC‑2 data file to import, the user will be returned to this dialog box.
  4. The Cross Section River Stationing section provides two methods for defining the cross section river stationing.
    • A cross section cannot be identified randomly. It is identified with a river name, reach name, and a river station. The numerical order for cross section river stationing is from highest river stationing upstream to lowest river stationing downstream.
    • By choosing the Use HEC‑2 cross sections IDs method, the software will import the cross sections with original IDs defined in the HEC‑2 model. The user can choose this option if the cross sections are numbered with highest river stationing to lowest river stationing downstream. Also, no two or more cross sections should have the same river station. If these two conditions remain unfulfilled, then the software will not import the data properly.
    • If the cross section data is not properly defined, choose the second method – Number cross sections sequentially. This method basically defines the cross sections in a sequential method, like 1,2,3,4, etc. However, it will maintain the numerical order for the cross section river stationing – from highest river stationing upstream to lowest river stationing downstream.
    • By default the Use HEC‑2 cross sections IDs radio button is selected. However, the user can choose the method that best meets their requirements.
  5. Click the [Import] button to import the HEC‑2 data file. After the HEC‑2 data has been imported, the software will zoom to the extents of the HEC‑2 model data.

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