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Title: An adaptive grid to improve the efficiency and accuracy of modelling underwater noise from shipping
Authors: Trigg, Leah E.
Chen, Feng
Shapiro, Georgy I.
Ingram, Simon N.
Embling, Clare B.
Keywords: Shipping
Underwater noise
Acoustic propagation models
Issue Date: 2018
Publisher: © Elsevier
Citation: TRIGG, L.E. ... et al, 2018. An adaptive grid to improve the efficiency and accuracy of modelling underwater noise from shipping. Marine Pollution Bulletin, 131 Part A, pp.589-601.
Abstract: Underwater noise pollution from shipping is a significant ecological concern. Acoustic propagation models are essential to predict noise levels and inform management activities to safeguard ecosystems. However, these models can be computationally expensive to execute. To increase computational efficiency, ships are spatially partitioned using grids but the cell size is often arbitrary. This work presents an adaptive grid where cell size varies with distance from the receiver to increase computational efficiency and accuracy. For a case study in the Celtic Sea, the adaptive grid represented a 2 to 5 fold increase in computational efficiency in August and December respectively, compared to a high resolution 1 km grid. A 5 km grid increased computational efficiency 5 fold again. However, over the first 25 km, the 5 km grid produced errors up to 13.8 dB compared to the 1 km grid, whereas, the adaptive grid generated errors of less than 0.5 dB.
Description: This paper is closed access until 3 May 2019.
Sponsor: This work was supported by a Plymouth University Research Studentship and the Plymouth Ocean Forecasting Centre (LG-33/300/01/2014).
Version: Accepted for publication
DOI: 10.1016/j.marpolbul.2018.04.034
URI: https://dspace.lboro.ac.uk/2134/33380
Publisher Link: https://doi.org/10.1016/j.marpolbul.2018.04.034
ISSN: 0025-326X
Appears in Collections:Closed Access (IT Services)

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