Recent applications of 3D wind-driven circulation modeling to a semi-enclosed sea: Hauraki Gulf, New Zealand

Two- and three-dimensional hydrodynamic models of the Hauraki Gulf (Auckland, New Zealand) have been developed over several years, verified against several observational datasets for currents, temperature and tides. The modeling has reached a stage where it is now being used in a wide range of applications to support resource management and maritime operations. The underpinning modeling relates to both tidal and wind-generated currents and circulation in the Gulf over a variety of timescales from hours to multiple decades. Applications of the model described in this paper relate to sustainability of fisheries and aquaculture, surface wind drift (search & rescue, outfall plumes, water quality) and yacht racing (e.g., Americas Cup). The next stage in utilizing the models is the development of a nowcasting and forecasting hydrodynamic system.