ABSTRACT
There are methods to classify the shape of the directional wave spectrum and eventually to identify the existing wave systems. Various proposals have been made of methods to separate the spectral components based on the frequency spectrum and a comparison between different approaches can be found in Ewans et al. (2006). The parameters of each individual spectral component are enough to allow fitting a double peak spectrum with two JONSWAP components (Guedes Soares, 1984). This was recently validated as an adequate approach for modelling swell (Lucas & Guedes Soares 2015).
