SMS:CGWAVE Incident Wave Conditions

The Incident Wave Conditions section allows the user to specify wave conditions to be simulated in a run. Each condition is defined as a wave direction, period and amplitude. The wave direction is specified in degrees measured from the positive x-direction in a counter clockwise direction. This means that waves propagating from West to East have a direction of 0°, and waves propagating from South to North have a direction of 90°. The amplitude is specified in meters, and the period in seconds. These values are used as boundary conditions out to sea and are propagated to the open ocean boundaries on the domain using one-dimensional wave propagation. A set of values (one direction, frequency and period) can be selected by clicking in the window. The selected set can be via the edit boxes above the window. The buttons below the window can be used as follows:

• New – The New button creates a new set below the selected set. The values are defaulted to zero.
• Copy – The Copy button copies the selected set as a new set in the list. The new set is placed directly below the selected set.
• Delete – The Delete button deletes the selected set. The rest of the sets are unaffected.
• Import – The Import button allows the user to select a file containing Incident Wave Conditions data. SMS prompts the user to replace or append to existing data. See the CGWAVE documentation for the Incident Wave Conditions file format.
• Clear – The Clear button deletes all of the Incident Wave Conditions data

Wave Condition Generation

The SMS interface for CGWAVE allows generation of multiple wave conditions from a spectrum in two ways. These are accessed using the buttons below the incident wave conditions.

• Generate From Spectrum – Wave conditions that make up a spectral wave condition can be added by selecting the spectrum to be simulated. A spectrum can be generated or read in using the Spectral Energy command CGWAVE menu.
• Long Wave Input Toolbox – The long wave input toolbox generates infra-gravity waves from a spectrum and input parameters.