Click on Deck/Roadway editor, and delete all information. We see that, in both cases, the deck elevation is not accurate. In our case, we have two bridges at river stations RS=5360.882 and RS=4123.291. Click on “Bridge/Culvert” editing button. The next step is to edit the structures data (bridges). We can use the editor to move bank stations, change the distribution of Manning’s n, add or delete ground points, etc. To check the quality of the imported data, we can use the graphical cross-section editor (Tools > Graphical Cross-section Edit) in the geometric data editor. Save the geometry file as “TuolumneGeometry” (File > Save Geometry Data). Data will be imported into the HEC-RAS geometry editor. Finally, in the last window (Cross Sections and IB Nodes), make sure all Import Data boxes are checked for cross-sections and click OK.Ĭlick on Finished-Import Data.
In the second window (River Reach Stream Lines), make sure all import stream lines boxes are checked, and click Next. In the first window (Intro), confirm SI (metric) units. Browse to “” file previously created in HEC-GeoRAS, and click OK. Next, click on File > Import Geometry Data > GIS Format. To import the GIS data into HEC-RAS, first go to the geometric data editor (Edit > Geometric Data…) Go to File > Save Project As… Save it as “TuolumneMeadows.prj” The latest version of HEC-RAS can be downloaded for free from the Hydraulic Engineering Center of the U.S.
Launch the HEC-RAS program (Start > Programs > HEC > HEC-RAS > HEC-RAS 4.1.0). It is one-dimensional, meaning that there is no direct modeling of the hydraulic effect of cross section shape changes, bends, and other two- and three-dimensional aspects of flow.
HEC-RAS is a program that models the hydraulics of water flow through natural rivers and other channels. After a long break, today we will see how to import the preprocessing data generated in part 1 of this tutorial into the HEC-RAS hydraulic model.
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