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<br />Chapter 4 Example Applicatkm <br /> <br />The next step is to select the desired flow regime for which the model will <br />perform calculations. For this example we will be performing Subcritical <br />flow calculations ouly. Make sure that Subcritical is the selected flow <br />regime. Additional job control features are available from the Options menu <br />bar, but none are required for this example. Once you have defined a plan and <br />set all the desired job control information, the plan information should be <br />saved. Saving the plan information is accomplished by selecting Save Plan <br />from the File menu of the Steady Flow Analysis window. <br /> <br />Now that everything has been set, the steady flow computations can be <br />performed by pressing the Compute button at the bottom of the Steady Flow <br />Simulation window. Once the compute button has been pressed, a separate <br />window will appear showing you the progress of the computations. Once the <br />computations have been completed, the computation window can be closed by <br />double clicking the upper left comer of the window. At this time the Steady <br />Flow Simulation window can also be closed. <br /> <br />Viewing Results <br /> <br />Once the model bas finished all of the computations successfully, you can <br />begin viewing the results. Several output options are available from the View <br />menu bar on the HEC-RAS main window. These options include: <br /> <br />. Cross section plots <br /> <br />. Profile plots <br /> <br />. Rating curves <br /> <br />. X- Y-Z Perspective Plots <br /> <br />. Detailed tabular output at a specific cross section (cross section table) <br /> <br />. Limited tabular output at many cross sections (profile table) <br /> <br />Let's begin by plotting a cross section. Select Cross Sections from the View <br />menu bar on the HEC-RAS main window. This will automatically bring up a <br />plot of the first cross section in Fall Creek, as shown in Figure 4.11. Any <br />cross section can be plotted by selecting the appropriate reach and river station <br />from the list boxes at the top of the cross section plot window. The user can <br />also step through the plots by using the up and down arrow buttons. Several <br />plotting features are available from the Options menu bar on the cross section <br />plot window. These options include: zoom in; zoom out; selecting which <br />plans, profiles and variables to plot; and control over lines, symbols, labels, <br />scaling, and grid options. <br /> <br />4-14 <br />