Event Title
A Compendium of the Effects of Marine Pile Driving on Salmonids and Forage Fish, and Advances in Sound Attenuation Technologies
Presentation Abstract
Impact pile driving has been associated with extremely high sound pressure levels, with potential effects to fauna protected under Endangered Species Act and Marine Mammal Protection Act. Regulatory agencies in the United States; the National Oceanic and Atmospheric Administration and the United States Fish and Wildlife Service, have established regulations to ensure these species are protected, including requiring measures to attenuate noise produced during in-water impact pile driving (e.g. bubble curtains). Vibratory pile driving is often considered the key mitigation measure to prevent injury to fish (e.g. barotrauma), and sound-attenuating devices are currently not required by agencies during vibratory pile driving. However, recently published data details observed adverse effects to Pacific herring (Clupea pallasii) during vibratory pile driving, including mortality.
Mitigating for noise produced during in-water pile driving comes at a high cost, including implementation of sound attenuating devices, and acoustic and biological monitoring. Currently, the most common method of sound attenuation employed is the bubble curtain. However, bubble curtain noise reduction is minimal, and effectiveness is reduced by factors such as improper deployment and bubble drift in current. Recent advances in sound attenuation technologies show promise in increasing noise reduction levels and in simplifying effective deployment. These developments include double-walled piles and encapsulated bubble systems, with documented noise reduction of up to 50 decibels. These new technologies could play a key role in streamlining monitoring requirements while protecting endangered juvenile salmon and key prey species during both impact and vibratory pile driving.
Session Title
From plankton to whales: underwater noise and its impacts on marine life
Conference Track
Species and Food Webs
Conference Name
Salish Sea Ecosystem Conference (2016 : Vancouver, B.C.)
Document Type
Event
Location
2016SSEC
Type of Presentation
Poster
Genre/Form
presentations (communicative events)
Contributing Repository
Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.
Subjects – Topical (LCSH)
Piling (Civil engineering); Noise control--Salish Sea (B.C. and Wash.); Fishes--Effect of noise on--Salish Sea (B.C. and Wash.)
Geographic Coverage
Salish Sea (B.C. and Wash.)
Rights
This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.
Type
Text
Language
English
Format
application/pdf
A Compendium of the Effects of Marine Pile Driving on Salmonids and Forage Fish, and Advances in Sound Attenuation Technologies
2016SSEC
Impact pile driving has been associated with extremely high sound pressure levels, with potential effects to fauna protected under Endangered Species Act and Marine Mammal Protection Act. Regulatory agencies in the United States; the National Oceanic and Atmospheric Administration and the United States Fish and Wildlife Service, have established regulations to ensure these species are protected, including requiring measures to attenuate noise produced during in-water impact pile driving (e.g. bubble curtains). Vibratory pile driving is often considered the key mitigation measure to prevent injury to fish (e.g. barotrauma), and sound-attenuating devices are currently not required by agencies during vibratory pile driving. However, recently published data details observed adverse effects to Pacific herring (Clupea pallasii) during vibratory pile driving, including mortality.
Mitigating for noise produced during in-water pile driving comes at a high cost, including implementation of sound attenuating devices, and acoustic and biological monitoring. Currently, the most common method of sound attenuation employed is the bubble curtain. However, bubble curtain noise reduction is minimal, and effectiveness is reduced by factors such as improper deployment and bubble drift in current. Recent advances in sound attenuation technologies show promise in increasing noise reduction levels and in simplifying effective deployment. These developments include double-walled piles and encapsulated bubble systems, with documented noise reduction of up to 50 decibels. These new technologies could play a key role in streamlining monitoring requirements while protecting endangered juvenile salmon and key prey species during both impact and vibratory pile driving.
