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Advisor(s)
Abstract(s)
Maintenance work on the harbor of Setu´bal, in Portugal, required the removal of a 14-m deep rocky
outcrop at the ship maneuver area, using about 35 kg of Gelamonite, a nitroglycerin-based highexplosive.
This important harbor is located in the Sado estuary, a biologically rich environment and
an important feeding area for a resident community of bottlenose dolphins. Using different safe
range calculation models, a mitigation and monitoring plan was developed that minimized the risks
of these underwater explosions for the dolphins. At our monitoring station, at 2 km from the demolition
site, acoustic pressure levels in excess of 170 dB re 1 lPa (root-mean-square) were measured.
Samples of dead fish collected at the site were indicative of shock trauma from the blasts.
Description
Keywords
Citation
Journal of the Acoustical Society of America, 128 (3), 3805-3808
Publisher
Acoustical Society of America