Underwater noise from pile driving in Moreton Bay, Qld
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This article presents measurements of underwater pile driving noise recorded during the construction of the duplicate Houghton Highway bridge in western Moreton Bay, Queensland. Moreton Bay is a protected marine park, a World Heritage Site and a Ramsar Wetland, providing habitat for turtles, dugong, sharks, dolphins and whales, some species of which are listed as vulnerable to endangered. Pile driving noise was measured for small and large piles at various locations and ranges.Using an acoustic propagation model, a sound map was computed for Bramble Bay. Sound levels were compared to currently available information on impact thresholds. Ranges greater than those corresponding to impact thresholds were scanned for the absence of dolphins before and during pile driving in line with a monitoring and response plan.
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Reduced detection of Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) in an inner harbour channel during pile driving activitiesPaiva, E.; Salgado Kent, Chandra; Gagnon, Marthe Monique; McCauley, Robert; Finn, H. (2015)There is limited information on the impacts of anthropogenic noise on dolphin behaviour, making assessment and mitigation of impacts from anthropogenic noises difficult. As the use of echolocation and other vocalizations ...
Wilkes, Daniel; Gourlay, Tim; Gavrilov, Alexander (2016)A coupled near-to-far field numerical model for predicting the acoustic emissions from impact pile driving in offshore environments is presented. Two axisymmetric near-field models, based on the finite difference method ...
Wilkes, D.; Gavrilov, Alexander (2017)© 2017 Acoustical Society of America. Sound emissions from impact pile driving of raked piles present a significant azimuthal dependence in the radiated sound field due to the non-axisymmetric orientation of the pile. In ...