2025_programme: Update of the 2020 field report (ERa) on impact pile-driving noise and application of noise mitigation technologies from 2020 to 2025

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  • Day: June 16, Monday
      Location / Time: D. CHLOE at 17:00-17:20
  • Last minutes changes: -
  • Session: 13. Pile driving noise -Radiated noise from offshore wind construction
    Organiser(s): Jonas von Pein, Vincent E. Premus
    Chairperson(s): Jonas von Pein, Vincent E. Premus
  • Lecture: Update of the 2020 field report (ERa) on impact pile-driving noise and application of noise mitigation technologies from 2020 to 2025 [Invited]
    Paper ID: 2162
    Author(s): Michael A. Bellmann, Patrick Remmers, Jonas Klug, Stephan Gerlach
    Presenter: Michael A. Bellmann
    Abstract: Most offshore foundations are installed by using impact pile-driving. Such noisy anthropogenic activities cause impulsive noise that enters the water, which might be harmful to marine life. In order to avoid temporal hearing threshold shifts for marine mammals, Germany was the first country in the world to define a noise mitigation value criterion (160 dBSEL and 190 dBLp,pk in 750 m distance). Based on this criterion noise abatement and mitigation systems were applied during pile-driving in German waters since 2011. In 2020, the experience with impact pile-driving noise and application of noise abatement/mitigation systems from German Offshore Wind Farms (OWF) was summarized in an experience report (ERa) by Bellmann et al. (2020). \nHowever, not only have the foundations increased in diameter within the last 5 years, but future OWFs are planned with larger pile diameter and in much deeper water (until today 40 m water depth; future up to 60 m). As a result, the requirements on noise mitigation increased significantly and new noise mitigation technologies have been tested. On the one hand, new hammer technologies such as PULSE, MNRU or EQ piling have been developed and tested offshore as noise mitigation systems to reduce the source level of impact pile-driving. On the other hand, improvements to existing noise abatement systems as well as new systems like enhanced Big Bubble Curtain have been successfully tested and new systems are currently available as prototypes. \nThis study provides an update on the latest experience with these new and improved mitigation technologies. The focus will be not only on the overall received broadband and frequency-dependent insertion loss, but also on the impact of new hammer technologies on the radiated pile-driving noise spectrum. Furthermore, the overall achievable noise reduction by combining different mitigation technologies is presented and the impacts on further OWF project are discussed.\n
  • Corresponding author: Dr Michael A. Bellmann
    Affiliation: itap GmbH
    Country: Germany

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