For wave uncertainties, this document describes the main theoretical limitations with particular regards to the inviscid and irrotational flow, water depth, linearized wave-structure interaction problem and wave field representation. The error analysis section deals with the influence of bathymetry in the wave resource as well as the influence of wave directional spreading in hydrodynamic interaction. Statistical and deterministic approaches are also described in order to address the environmental input uncertainties and how these uncertainties are reflected in the wave sub module output. Theoretical limitations for tidal technology uncertainties are discussed considering flow field modelling, wake interactions, horizontal-boundary assumptions, vertical-dimension assumptions and device yawing. The error analysis is mainly based on the PerAWaT flume experiments. Environmental issues are discussed through a synoptic review of energy extraction, collision risks, turbidity, underwater noise, chemical pollution as well as potential beneficial effects such as reef effect, reserve effect and resting place. General and specific recommendations are then given in order to minimize environmental impacts. The module is described with its main functions related to environmental impact dependencies on array changes.

Partners of the project: The University of Edinburgh, Tecnalia, IWES, HMRC MCC, The University of Exeter, Aalborg University, Marintek, WavEC Offshore Renewables, France Energies Marines, Iberdrola, Vattenfall, DEME Blue Energy, Prysmian, Tension Technologies International, ITP Power, Sandia National Laboratories, Joint Research Centre, Ocean Energy Europe

Funding: This project has received funding from the European Union's FP7 under grant agreement n°608597.