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Offshore dredger sounds: Source levels, sound maps, and risk assessment

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Author: Jong, C.A.F. de · Ainslie, M.A. · Heinis, F. · Janmaat, J.
Type:bookPart
Date:2016
Publisher: Springer
Source:Popper, A.N.Hawkins, A., The Effects of Noise on Aquatic Life II, 189-196
series:
Advances in Experimental Medicine and Biology
Identifier: 530282
doi: doi:10.1007/978-1-4939-2981-8_22
Keywords: Biology · Marine fauna · Shipping · Threshold shift · Underwater acoustics · Mapping · Aquatic fauna · Auditory threshold shift · Construction work · Dredger sound · Environmental impact assessment · Exposure · Fish · Model · Noise injury · Phoca vitulina · Phocoena phocoena · Porpoise · Risk assessment · Underwater sound · Sound measurement · Sound pressure · Sound propagation model · Temporary threshold shift · Defence Research · Defence, Safety and Security · Observation, Weapon & Protection Systems · AS - Acoustics & Sonar · TS - Technical Sciences

Abstract

The underwater sound produced during construction of the Port of Rotterdam harbor extension (Maasvlakte 2) was measured, with emphasis on the contribution of the trailing suction hopper dredgers during their various activities: dredging, transport, and discharge of sediment. Measured source levels of the dredgers, estimated source levels of other shipping, and time-dependent position data from a vessel-tracking system were used as input for a propagation model to generate dynamic sound maps. Various scenarios were studied to assess the risk of possible effects of the sound from dredging activities on marine fauna, specifically on porpoises, seals, and fish. © Springer Science+Business Media New York 2016.