WP4 Marine Environment
The objective is to develop improved methodologies to determine coastal metocean conditions using consistent open access hindcasts of atmospheric and oceanic parameters, in order to reduce and quantify uncertainties in the environmental description for design basis.
The semi-sheltered coastal region often allows lower design criteria than offshore, but complex typography, bathymetry and site conditions can make it more challenging to determine the design action on a floating structure. Wind jets, partial wave sheltering, and peridically strong currents may lead to large spatial variability across a fjord. Shallow water, tides, tsunami-risks and wave breaking must also be taken into consideration. Novel coastal structures may have a horizontal extent and lifetime that makes it necessary to take these spatial variations as well as possible future changes into account. To reduce the threshold for designing new large structures in a reliable manner and at an appropriate safety level, knowledge of this varability should be available at an early stage of the design process. There is a need to calculate design actions for new structures and in new locations in a safe, optimal and efficient manner based on hindcast data sets, and with as few location-specific measurement campaigns as possible. There is also a need for cost-effective methods for seaved characterisation.