Acoustic Modelling for the Environmental Impact Assessment of Tidal Turbine Arrays

Xi Engineering

Usually the first time that the operational sound from new tidal turbines can be measured is after they have been installed and are already interacting with animals in the marine environment. A modelling solution is therefore required to estimate whether marine animals will be able to hear and avoid contact with tidal turbines. An acoustic-structural interaction model is used calculate the acoustic output of tidal turbines. The cumulative sound of an array of tidal turbines and its dependence on bathymetry is calculated using a parabolic equation code. Modelled and measured sound pressure levels give information on potential upstream warning distances/times for animals which in turn helps to consider collision risk.