Frequency banded wave climate description based on the observed directional spectra

Toshihiko Nagai, Noriaki Hashimoto, Koji Kawaguchi, Hiroshi Yokoi, Masanobu Kudaka, Masao Mitsui

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A new system for directional wave spectrum observation was developed by improving the Nationwide Ocean Wave information network for Ports and HArbourS (NOWPHAS). Either Doppler Type Wave Directional Meter (DWDM) or Wave Gauge Array System is adopted for wave observations. Directional spectra are estimated by EMLM method for DWDM and EMEP method for array system. For the convenience, the obtained directional spectra are expressed as the frequency banded wave heights and directions corresponding to the wave spectrum. Examples of annual statistics of the directional wave spectra at three typical NOWPHAS wave stations are introduced in this paper.

Original languageEnglish
Pages (from-to)53-65
Number of pages13
JournalCoastal Engineering Journal
Issue number1
Publication statusPublished - Mar 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Ocean Engineering


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