a wave spectrum developed for fetch-limited wind waves. This is basically the Pierson-Moskowitz spectrum multipled by an extra peak enhancement factor and fetch-dependent scale parameters. ; JONSWAP - acronym for JOint North Sea WAve Project.
3.1. Wave spectra
The Jonswap spectrum it to be used as this describes fetch and duration limited seas which correspond to the majority of the conditions world wide. In this respect it is important that not only the peak period of the wave train is verified but also that the zero crossing period is correct.