From 2006 to 2012 the HAWA-I
Joint Industry Projects provided a better understanding of the effect of infragravity waves on nearshore LNG facilities and resulted in a methodology to take infragravity waves into account in the design of such a facility in specific nearshore locations. Taking these waves into account was found essential, because in shallow water they can actually dominate the motion response of the vessel. Since then most new projects consisted of developments in deeper water. However, in recent years the focus of projects in the field has shifted again to shallow water, and the design of LNG terminals in a nearshore environment has become a critical topic again. Also, the design of permanently moored offshore structures in shallow water has been found especially challenging due to the lack of detailed guidelines. Failures of mooring systems have been observed in the field due to infragravity waves, which show that the infragravity waves remain a critical aspect in design methodologies.
The objective of the HAWA-III JIP is to validate the overall design methodology of nearshore terminals based on model scale and full scale measurements, to provide the tools and guidelines to apply the methodology, and to assess the effectiveness of breakwater and innovative mooring solutions to improve the workability of nearshore terminals. The results from the previous two JIP phases will be used and expanded to reach this objective.