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Low flow and weir flow (with adjustments for submergence on the weir).
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The bridge computational methods have the ability to model: This option allows the user to have a grid overlaid on top of the bridge or culvert graphic.The HEC‑RAS bridge computations allow the modeler to analyze a bridge using several different methods without changing the bridge geometry.
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Piers are clipped below the ground and above the low chord of the bridge. This option allows the user to see exactly what the program thinks piers are, and to see how the pier information has been clipped. When this option is turned on the interface will highlight what it thinks is the extent of the pier information. This option is very useful for detecting any data entry errors that may otherwise go unnoticed. If the any of these three colors show up in an area where they should not be, then there must be a geometric mistake in the data. Within the bridge opening, the ground information will be highlighted in blue and the lid of the opening (deck/roadway low cord data) will be highlighted in green. The program will also highlight any bridge openings. The red color shows what the program will use for weir flow if the Pressure and Weir option is selected for high flows. The program will highlight in red the combination of the deck/roadway high cord and any ground to the left and right of this data. When this option is selected, various portions of the bridge/culvert graphic will be highlighted. When this option is selected, both the downstream and upstream sides of the bridge will be displayed in the viewing area. When this option is selected, only the downstream side of the bridge or culvert will be displayed.ĭisplay Both. When this option is selected, only the upstream side of the bridge or culvert will be displayed.ĭisplay Downstream XS. The graphic will be redrawn with a new portion of the graphic shown in the zoomed in area.ĭisplay Upstream XS. Next, move the graphic in the desired direction, and then release the left mouse button. This is accomplished by first selecting the Pan option, then pressing and holding down the left mouse button while over the graphic.
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When this option is selected, the user can move the zoomed in portion of the graphic.
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When this option is selected, the graphic is automatically redrawn back to its full extent, showing the entire bridge/culvert. Zooming out is accomplished by selecting Zoom Out from the View menu bar on the bridge/culvert data editor.įull Plot. This option displays the bridge or culvert back into its original size before you zoomed in. Finally, release the left mouse button and the viewing area will display the zoomed in area of the bridge or culvert. Then press down on the left mouse button and drag the mouse to define a box containing the desired zoom area. Defining the zoom area is accomplished by placing the mouse pointer in the upper left corner of the desired area. This is accomplished by selecting Zoom In from the View menu, then specifying the area to zoom in on with the mouse. This option allows the user to zoom in on a piece of the bridge or culvert. These options are available from the View menu on the bridge/culvert data editor. These options include: Zoom In Zoom Out Display Upstream XS Display Downstream XS Display Both Highlight Weir, Opening Lid and Ground Highlight Piers and Grid. Several options are available for viewing the bridge/culvert geometric data.