We are thrilled to announce our first ever Webinar Series. We have collated a range of presentation topics to spark your interest covering contemporary New Zealand coastal issues like storm surge and climate change, through to the use of new technologies in localised coastal zone monitoring. Every month we will have an hour long free webinar that you can register for and then login, sit back, and enjoy. Keep your eyes open for each month’s webinar announcement.
Register for July’s webinar here, and mark your calendar! This month we have two great talks:
Storm surge and wave climate projections (2020-2100) for Aotearoa New Zealand
Giovanni Coco, Joao Albuquerque, Laura Cagigal
A collaborative project by the University of Auckland with University of Cantabria has generated a nationwide set of projections of nearshore wave and storm surge conditions. The projections look at the next 80 years and are obtained using an innovative “multi-model” approach, which combines dynamical modelling and statistical downscaling. IPCC emission scenarios and associated climate properties are used to drive these predictions of future wave and surge processes.
The projections are calculated at a scale of about 25 (storm surge) and 10 (waves) kilometres for the whole New Zealand coastline. Also for the first time, this data is now publicly available through a free-access web-based platform. The data, which includes also hindcasts of both storm surge and waves, can be downloaded here.
This work provides unprecedented access to vital information for decision-makers involved in coastal planning. Our data also provides robust evidence to understand both the present and future changes in coastal hazards associated to climate change.
Composite modelling: Experiments and CFD combined for better design insights on coastal structures
The design of coastal structures continues to rely heavily on physical experiments, either compiled into widely-used semi-empirical formulations or to produce ad hoc formulations for non-conventional structures. Numerical modelling, having been under development for some decades now, has the potential to disrupt the design methodology in coastal engineering by providing detailed insights, additional data impossible to measure in the laboratory or by informing about scale effects. The largest benefits can be obtained when applying composite modelling, i.e. physical and numerical modelling working together in a complementary way.
In this presentation we will introduce the methodology to establish a composite modelling framework, outlining the advantages that it can offer and the challenges associated to its implementation. We will also review several practical applications in which two- and three-dimensional CFD models have been applied to analyse the wave-induced forces on a structure or the overtopping over it.