Modelling pollution dispersal around Solomon Islands and Vanuatu

Jennifer Graham, John Bacon, David Haverson

Research output: Contribution to journalArticle

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Abstract

To assess potential dispersion of pollutants around Honiara, Solomon Islands, and Port Vila, Vanuatu, 3D ocean circulation models were developed using Telemac-3D. A series of scenarios then explore the vulnerability of the system and test potential control measures. Results show that high coastal concentrations are most likely during the wet season, with increased volumes of discharge as well as favourable wind speed and direction. Buoyant plumes flow along the coastline, and high concentrations build up in enclosed bays. Control measures tested focus on consolidating existing outflows at depth off-shore. This results in an overall reduction of surface concentrations along the coastline. However, the reduction is dependent on the depth, off-shore positioning, and volume of outflow. With increased concentrations then found at depth, the subsequent impact on off-shore and benthic ecosystems would also need to be considered.
Original languageEnglish
Article number110589
Number of pages12
JournalMarine Pollution Bulletin
Volume150
Early online date14 Nov 2019
DOIs
Publication statusPublished - Jan 2020

Keywords

  • Marine pollution
  • Ocean modelling
  • Small island developing states
  • South Pacific
  • Water quality
  • MANAGEMENT
  • CIRCULATION

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