Abstract Title

Session S-01C: Salish Sea Marine Vessels: Programs and Impacts

Keywords

Water Quality-Related

Start Date

30-4-2014 10:30 AM

End Date

30-4-2014 12:00 PM

Description

We present underwater noise pollution levels and statistics from ~7000 commercial ships that transited Haro Strait in a 30-month period during 2011-2013. Bulk carriers make up 34% of the ships, while tankers constitute 5% of the traffic. On average 22.5 ships pass Lime Kiln lighthouse each day, or about 1 per hour. We combine typical source levels from specific vessel classes with the auditory thresholds of marine mammals that inhabit the Salish Sea to model how increased noise reduces communication and foraging space, particularly for the endangered Southern Resident killer whales. Finally, we compare how acoustic impacts change under different growth scenarios for commercial shipping, including: increased proportion of tankers; increased proportion of bulk carriers; increased traffic with constant proportion of ship classes.

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Apr 30th, 10:30 AM Apr 30th, 12:00 PM

Noise impacts in the Salish Sea under commercial shipping growth scenarios

Room 606

We present underwater noise pollution levels and statistics from ~7000 commercial ships that transited Haro Strait in a 30-month period during 2011-2013. Bulk carriers make up 34% of the ships, while tankers constitute 5% of the traffic. On average 22.5 ships pass Lime Kiln lighthouse each day, or about 1 per hour. We combine typical source levels from specific vessel classes with the auditory thresholds of marine mammals that inhabit the Salish Sea to model how increased noise reduces communication and foraging space, particularly for the endangered Southern Resident killer whales. Finally, we compare how acoustic impacts change under different growth scenarios for commercial shipping, including: increased proportion of tankers; increased proportion of bulk carriers; increased traffic with constant proportion of ship classes.