SMS:1D Grid Tools

The 1D grid tools are available in the 1D grid module when working with the GenCade model. These tools allow editing the features on a 1D grid. These festures include:

• Shorelines associated with the grid
• Structures along the shoreline:

• Seawalls
• Groins
• Breakwaters

It is recommended to manage a GenCade project through a conceptual model in a GenCade coverage. The conceptual model allows more flexibility when specifying the structures because it works in real world space. These tools work on the 1D grid using grid cell indices and distances from the grid to locate the objects. The GenCade menu also provides commands to edit the objects.

The tools include:

• Select Point – Allows selecting a point on the initial shoreline defined for the grid and dragging it closer to or farther away from the grid. Since the distance along the grid is not variable for the selected point, the edit only affects the local "Y" value of the grid point. Since the grid usually consists of many points along the shoreline, editing the shoreline with this tool can be tedious.

• Create Point – This tool is currently disabled. With other 1D grid models that have been supported in the SMS package, creating grid points using this tool was supported. The only 1D grid model currently included in the package (GenCade), does not support this feature. This tool would be used to create a point along the initial coastline.

• Select Detached Breakwater – This tool is used to edit a breakwater positioned along the grid. With this tool active, a click in the graphics window selects an endpoint of a breakwater, and dragging the mouse with the end point selected moves the endpoint of the breakwater. The depth, transmission and permeability of the breakwater must be assigned using either the GenCade | Detached Breakwaters command or by assigning these attributes to an arc in the conceptual model.

• Create Breakwater – This tool can be used to create a breakwater in a simulation. Clicking in the graphics window with this tool active defines a starting point for a breakwater. SMS will then draw a "rubber band line" from this location to the cursor until a second location is clicked, terminating the breakwater. Attributes for the breakwater must be assigned using either the GenCade | Detached Breakwaters command or by assigning these attributes to an arc in the conceptual model.

• Select Jetty or Groin – This tool is used to edit the length of a groin or jetty positioned along the grid. With this tool active, a click in the graphics window selects an endpoint of a groin, and dragging the mouse with the end point selected moves the endpoint of the groin, thus changing its length. Other attributes of the groin/jetty must be assigned using either the GenCade | Groins or GenCade | Inlets commands or by assigning these attributes to an arc in the conceptual model.

• Create Groin – This tool can be used to create a groin in a simulation. Clicking in the graphics window with this tool active defines the end point for a groin. SMS will connect this location to the grid defining the groin. Attributes for the groin must be assigned using the GenCade | Groins command or by assigning these attributes to an arc in the conceptual model.

• Select Seawall – This tool is used to edit the shape of an existing seawall along the grid. With this tool active, a click in the graphics window selects a point in a seawall. Dragging the mouse with the point selected modifies the seawall. As with grids, seawalls often include multiple segments making them tedious to edit using this approach.

• Create Seawall – This tool can be used to create seawall segments along the grid. With this tool active, a click in the graphics window starts the creation of a segment. A second click terminates the segment. When the segment is complete, SMS determines if this segment overlaps existing segments and trims the existing segments to the new segment if an overlap exists.

Related Topics

• 1D Grid Module