Publicação
Monitoring underwater explosions in the habitat of resident bottlenose dolphins
| Resumo: | 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. |
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| Autores principais: | Santos, Manuel Eduardo dos |
| Outros Autores: | Couchinho, Miguel Nogueira; Luís, Ana Rita; Gonçalves, Emanuel João |
| Ano: | 2010 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Ispa-Instituto Universitário |
| Idioma: | inglês |
| Origem: | Repositório do Ispa - Instituto Universitário |
| Resumo: | 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. |
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