SMS:BOUSS Runup / Overtopping
The data from various coverages in SMS is combined to create a BOUSS2D Run-up / Overtopping simulation. The different coverages are as follows:
Transects Coverage
Transects are made by creating arcs in the transects coverage. Each transect represents the 1-d grid used for a run-up simulation. It is recommended that these transects be linear. To assign elevations to the transects, use the right-click option, "Extract elevations". This will prompt you to select a dataset to use for extracting. This must be done before launching a run-up simulation.
Wavemaker Coverage
Wavemakers are made by creating arcs in this coverage. The wave maker properties can be edited by double-clicking on the arc or by right-clicking and selecting "Attributes." Each wavemaker can have multiple sets of wave parameters. Each set of wave parameters will be run in a separate simulation. It is necessary that each wavemaker arc in a simulation has the same number of wave parameters. The location of the wave makers on the transect is determined by the intersection of the transect arc and the wavemaker arc. Each transect arc may have only one wavemaker.
Probes Coverage
Probes are also made by creating arcs. The location of each probe on the transect is determined by the intersection of the transect arc and the probe arc. In the arc attributes, you can set the type of probe, which can be any of the following: Velocity, Pressure, Water Surface Elevation and Force. To create a run-up probe, simply create a polygon in the desired location. The run-up probe will be the portion of the transect arc that is inside of the polygon.
Auto-Create Probes
The properties dialog for the probes coverage can be used to automatically create probes.
Runup Probes
To automatically create a runup probe, define the following variables:
- Minumum z – probes will not be created below this elevation
- Maximum z – probes will not be created above this elevation
- Delta z – the difference in elevation that must occur for a probe to be created
When auto-creating these probes, SMS will traverse the transect arc, starting from the land and going seaward. Once a local maximum that is below "maximum z" is found, this point will be the starting point of the probe. SMS continues to traverse the arc until it reaches a point that is a distance of "delta z" below the starting point. This point will be the end point. However, if SMS reaches another local maximum with a higher elevation than the starting point, this point with the higher elevation will replace the original starting point.
Other Probes
To automatically create other types of probes, you need to set the following parameters:
- Elevation (m) – this is the elevation (along the transect) at which the probe should be placed
- Location – this can be set to "First" or "Last". This is used only when the defined elevation occurs more than once on the transect arc. If "First" is selected, the probe will be placed at the first qualifying location on the transect arc. If "Last" is selected, the probe will be placed at the last location.
- Probe Types – the available probe types are flowrate, WSE, force, pressure, and velocity. You can set which type(s) should be created for this rule. For pressure and velocity, you must define elevation(s) above the seabed where they should be placed. These can be entered by clicking the "Define..." button next to their checkboxes.
Damping / Porosity Coverage
Damping and porosity attributes are created by making arcs. The type of attribute (damping or porosity) and its coefficient and width are set in the arc properties.
Roughness Coverage
If there is varying roughness throughout a transect arc, roughness polygons can be used to define the varying roughness. Each polygon that is created will be assigned a Chezy roughness value (set in the polygon attributes). The portion of the transect arc that is inside of the polygon will be assigned that value. Otherwise, the default Chezy coefficient (defined in the model control), will be used. Note: It is helpful to turn on the display of inactive coverages while creating the wavemakers, probes, damping arcs, porosity arcs, and roughness polygons. This enables you to see the location of the transect arcs to ensure that you are intersecting the wavemakers, probes, etc., in the desired locations.
