00000nam 2200000zi 4500 9.905692 CaOODSP 20230327142419 m o d f cr mn||||||||| 211207t20212021bccab ob f000 0 eng d 9780660412238 CaOODSP eng rda CaOODSP eng eng fre n-cn-bc y1y1 T42-28/2021E-PDF Matthews, Marie-Noël R., author. Assessment of vessel noise within the southern resident killer whale interim sanctuary zones : final report / by Marie-Noël R. Matthews, Connor Grooms. Assessment of vessel noise within SRKW interim sanctuary zones Version 2.0. Victoria, BC : JASCO Applied Sciences (Canada) Ltd, 2021. ©2021 1 online resource (xiii, 21, 13, 2 pages) : illustrations (chiefly colour), colour maps text txt rdacontent computer c rdamedia online resource cr rdacarrier "Unclassified." "TP 15509E." "Prepared for: Innovation Centre of Transport Canada; by: JASCO Applied Sciences (Canada) Ltd." "11 August 2021." Includes bibliographical references (pages 19-21). "The Government of Canada, aiming to reduce SRKW exposure to underwater noise from vessels, implemented Interim Sanctuary Zones around Saturna and Pender Islands (Salish Sea) from 1 June to 31 October 2019. JASCO Applied Sciences (JASCO) performed a study to quantify vessel noise both with and without the implementation of these zones to estimate their effectiveness in reducing vessel noise levels within the zones. JASCO's cumulative noise model was applied for each zone to predict monthly averaged noise levels associated with vessel traffic conditions before and during the implementation of the sanctuary zones. The effectiveness of these zones is assessed quantitatively according to the estimated changes in noise levels. The results, which consider multiple commercial, government and recreational vessel classes, show that this mitigation approach would result in a decrease of unweighted noise levels by, on average, 0.5 (±0.4) dB within the Saturna Island Interim Sanctuary Zone and 3.0 (±1.0) dB within the Pender Island Interim Sanctuary Zone. The decrease is greater for audiogram-weighted noise levels: 2.2 (±1.1) dB and 4.6 (±1.3) dB, respectively. These results are based on an idealized level of compliance by vessels in the area, and accounts for the exemptions stated in the 2019 Interim Order"--Page iii. Includes abstracts and summaries in English and French. Ships Noise British Columbia Saturna Island Measurement. Ships Noise British Columbia Pender Islands Measurement. Underwater acoustics British Columbia Saturna Island Measurement. Underwater acoustics British Columbia Pender Islands Measurement. Navires Bruit Colombie-Britannique Saturna, Île Mesure. Navires Bruit Colombie-Britannique Pender, Îles Mesure. Acoustique sous-marine Colombie-Britannique Saturna, Île Mesure. Acoustique sous-marine Colombie-Britannique Pender, Îles Mesure. Canada. Transport Canada, issuing body. PDF 2.14 MB https://publications.gc.ca/collections/collection_2023/tc/T42-28-2021-eng.pdf TP 15509E