Effects of waves and currents on gravity-type cages in the open sea

Chai Cheng Huang, Hung Jie Tang, Jin Yuan Liu

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


The effects of waves with a uniform current on marine aquaculture gravity-type cages were analyzed using a numerical model previously validated by physical model tests. The present analysis employs a numerical algorithm to study the dynamic behaviors of the net-cage system when impinged upon by surface waves from various angles over a uniform current. The maximum tension of the mooring lines and the minimum volume reduction coefficients of the rearing system were analyzed. We found that the current-induced effects on the net-cage system were more important than those due to waves only. We conclude that farming sites should not be situated in areas where the current speed exceeds 1 m/s, unless technological devices are available to overcome serious net-cage volume deformation. Furthermore, we recommend that, whenever possible, the combined effects of various oblique waves and currents be carefully examined before a system is installed. Finally, the ideal range of water depth for net-cage implementation in the open sea is between 30 and 50 m.

Original languageEnglish
Pages (from-to)105-116
Number of pages12
JournalAquacultural Engineering
Issue number2
Publication statusPublished - 2008 Apr

All Science Journal Classification (ASJC) codes

  • Aquatic Science


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