Import Flow Depth Points

This function extracts the flow depth distribution from the HEC-RAS output report file (.REP). The depth points are extracted at every cross section along the river channel. All points are imported to a Carlson coordinate file (.CRD) and can be plotted in a TIN.

Running HEC-RAS

In order to get the flow depth at all cross sections, some guide lines in running HEC-RAS are provided as below.

1. From the Watershed > HEC-RAS Water Surface Model menu in the Hydrology Module, choose Prepare HEC-RAS Input File command to make a HEC-RAS geometry file (.GEO), which contains the cross section data of one or more reaches. Then in HEC-RAS, in Geometric Data dialog, select Import Geometry Data of GIS format from File menu and load the .GEO file.

2. When running Steady/Unsteady Flow Analysis, in the Steady/Unsteady Analysis dialog, choose Flow Distribution Locations command from the Options menu. This command allows you to subdivide the left bank, channel and right bank. Specify as many subsections as needed. You can define up to 45 subsections.

HEC-RAS: Flow Distribution Dialog

3. After finishing the flow analysis, select Generate Report command from File menu to display the Report Generator dialog. In the Output field, make sure to check the Flow Distribution check box and set the Summary Tables to Standard Table 1.

HEC-RAS: Report Generator Dialog

Importing Depth Points

Select Import Flow Depth Points from Watershed > HEC-RAS Water Surface Model menu. This command takes the HEC-RAS output file (.REP) and display the Reaches list and Profiles list in the Import Hydraulic Depth Points dialog. In the Reach Section and Alignment File boxes, type or select a section file(.SCT) and the corresponding section alignment file (.MXS) that have been used to generate HEC-RAS input file (.GEO). In the Import to Flow Depth CRD File box, type or select a CRD file. In the Starting Point Number box, enter the starting point number, the default number is 1. In the Reach and Profile lists, choose the reach and profile that you want to output, and then click OK button to extract the flow depth distributions and write data to the .CRD file.

Import Hydraulic Depth Points Dialog

Prompts

Import Flow Depth Points dialog:Fill in values.

Pulldown Menu Location: Watershed > HEC - RAS Water Surface Model > Import Flow Depth Points
Keyboard Command: crdrasdt
Prerequisite: HEC-RAS output report file (.REP) and the corresponding section file (.SCT) and section alignment file (.MXS)