User:Jcreer/SMS:SRH-2D Floodway Tools

Generate Floodway Simulation

The SRH-2D Floodway Simulation Generation dialog

The Generate Floodway Simulation tool creates a new SHR-2D simulation for evaluating a floodway. The tool is accessed using the SRH-2D simulation right-click menu selecting the Floodway Tools | Generate Floodway Simulations command. The tool will bring up the SRH-2D Floodway Simulation Generation dialog. The dialog has the following options:

• WSE Maximum Rise – The maximum rise for the water surface elevation in the floodway simulation. This value should be positive.
• Units – Set the units for the WSE maximum rise. The units should match the project units.

After completing the SRH-2D Floodway Simulation Generation dialog and clicking OK, the Generate SRH-2D Floodway Simulation dialog will appear showing the progress for the generation of the floodway simulation. If there are errors during the generation process, they will appear in this dialog. When the generation process proceeds successfully, a message will appear.

The Generate SRH-2D Floodway Simulation dialog

Generate Floodway Elevation Lines

The Generate Floodway Evaluation Lines dialog

The Generate Floodway Evaluation Lines tool will create a new Area Property coverage with arcs that can be used for evaluating floodway elevations. The generated arcs will have an assigned elevation using a water surface elevation dataset. These arcs can then be compared to floodway data. The tool is accessed using the SRH-2D simulation right-click menu selecting the Floodway Tools | Generate Floodway Evaluation Lines command. The tool will bring up the Generate Floodway Evaluation Lines dialog. The dialog has the following options:

Input – This section defines the parameters that will be used when generating the evaluation lines.

• Intersect contours with centerline – Turn on this option so that all of the generate evaluation lines intersect a chosen centerline.
  • Centerline Coverage – Clicking the Select button next to this option will bring up the Select Centerline Coverage dialog where a centerline can be selected to use during the evaluation line generation.
• Water surface elevation dataset – Clicking the Select button next to this option will bring up the Select WSE Dataset dialog where the water surface elevation dataset can be selected to use in the evaluation line generation. This dataset will determine the elevation of the evaluation lines. For transient datasets, a time step can be selected.
  • Contour length threshhold – Sets a threshold for length of the contours in the WSE dataset used to generate the evaluation lines.
    • Minimum value – The minimum length value of the contours based on the selected WSE dataset.
    • Maximum value – The maximum length value of the contours based on the selected WSE dataset.
  • Interval value – The interval of the elevation values to use in determining the contour lines.
    • Maximum number of contours – The number of contour lines that will be generated from the WSE dataset based on the entered interval.
  • Specify a range – Turn on this option to adjust the minimum and maximum contour lengths.
    • Minimum value – Set the minimum length value of the contours based on the selected WSE dataset.
    • Maximum value – Set the maximum length value of the contours based on the selected WSE dataset.

Results – This section provides parameters for the results of generating the evaluation lines.

• Output coverage name – Enter a name for the coverage that will hold the evaluation lines.

Related Topics

• SRH-2D Menu