Evaluation of the impact of the uncertainties on environmental data for far-field propagation in shallow water with Split-Step Padé PE

Regular paper

Stéphane Lesoinne

University of Liège

Monday 1 june, 2015, 18:00 - 18:20

0.2 Berlin (90)

In offshore wind farms, the installation of a wind turbine is commonly done by driving a pile into the seabed, generating high energetic impulsive noise with possible negative impact on the marine fauna. The assessment of the environmental impact of pile driving has becomed an important challenge. In conjunction with numerical models of the sound source (pile driven by hammer), numerical underwater sound propagation models can be used to predict the sound pressure levels evolution over the distance from the pile. However, those models depend on environmental input data which are marred by uncertainties that can affect the simulation results. In this paper, the impact of those uncertainties on far-field propagation transmission losses is studied using an elastic parabolic equation (RAMS) on a test case in the English Channel. The sensitivity of the model is given for the estimated maximum boundaries on the data uncertainties.

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