SWAN is a numerical wave model to obtain realistic estimates of wave parameters in coastal areas, lakes and estuaries from given wind-, bottom-, and current conditions.
SWAN is a third-generation wave model which computes random, short-crested wind-generated waves in coastal regions and inland waters. It is fully spectral in frequencies and directions. SWAN accounts for the following physics:
- wave propagation, shoaling, refraction due to current and depth;
- wave generation by wind;
- three- and four-wave interactions;
- white capping, bottom friction, and depth-induced breaking;
- wave induced set-up;
- transmission through and reflection from obstacles;
- wave diffraction.
SWAN computations can be made on a regular, curvi-linear or unstructured grid in a cartesian or spherical co-ordinate system. The use of nested runs allows for higher resolutions in the area of interest.SWAN provides among others the following output :
- one- and two-dimensional spectra;
- significant wave height and mean wave period;
- average wave direction and directional spreading;
- one- and two-dimensional spectral source terms;
- wave-induced force and set-up.