In this study the use of a hybrid shoreline model, namely the Mike21FM Shoreline Model, has been applied to investigate the effectiveness of three different coastal protection schemes for Palm Beach in Southern Queensland, Australia. The yearly littoral drift on this shoreline is approximately 500,000 m3 to the north. The three coastal protection schemes are: Nourishment, Nourishment plus a submerged control structure and Nourishment plus artificial headlands. The coastal impact due to the three schemes is quantified and compared using the shoreline model. The results assisted the Gold Coast City Council in their decision on which option to bring forward to the detailed design phase.

This paper presents the results of a CFD model of the wave run-up on a monopile. The monopile is widely used as the foundation unit for offshore wind turbines. The aim for the calculations is to make a detailed investigation of the effect of three-dimensional (3D) waves on the run-up and to determine the maximum wave run-up. The CFD results are compared with the results of physical model tests conducted under the same conditions. The model tests were conducted under idealized conditions: The tests were carried out on a horizontal bottom using phase and directional focused waves to obtain a 3D effect and at the same time being able to control the breaking. The key objective of this part of the numerical analysis is to develop a model capable of reproducing the results of the physical model tests.

A method for simulating the motions and mooring forces of a moored ship subject to wave forcing has been further developed and validated for both the open water case and inside harbour areas. The method was originally developed and reported in Bingham (2000). The simulation tool is named WAMSIM and it solves the equations of motions in the time domain. The package applies the WAMIT® model to provide the frequency domain hydrodynamic characteristics (the frequency response functions or FRFs) of the body. Examples from both open waters and enclosed waters in harbours are presented.

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The MIKE 21 FM Shoreline Model was applied to predict the coastal response of an artificial reef constructed in the surf-zone at Narrowneck, Queensland, Australia. The construction of the reef began in 1999 and completed in 2000; it was constructed from geotextile sand bag; a portion of which broke during construction and the following period. The reef was maintained by addition of new sand bags until 2006. The coastal response from the reef was analyzed by integrating the beach volume between the height of the dune and the depth of closure using measured coastal profiles. The analysis showed that in the early days of the reef a clear salient in the beach volume was observed in the lee of the reef. This salient was smaller in 2006 and in later years, 2012 and 2013 it was no longer visible in the data. The MIKE 21 FM shoreline model was applied to reproduce the observed coastal response. It was found that the position of the longshore bar relative to the position of the reef is important for the predicted coastal response. By running the model using a subset of the measured coastal profiles from the site, the envelope of the predicted coastal response matches reasonably well with the measured response.