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  • Water circulation and impact on water quality in the southwest of Efate Island, Vanuatu

    Author(s)
    Faivre, Gaelle
    Sami, Erie
    Mackey, Brendan
    Tomlinson, Rodger
    Zhang, Hong
    Kotra, Krishna Kumar
    Aimbie, Jim
    Maniel, Michael
    da Silva, Guilherme Vieira
    Rand, Emily
    Griffith University Author(s)
    Faivre, Gaelle S.
    Mackey, Brendan
    Zhang, Hong
    Vieira da Silva, Guilherme
    Tomlinson, Rodger B.
    Year published
    2021
    Metadata
    Show full item record
    Abstract
    In Small Island Developing States (SIDS), water pollution is not monitored or assessed frequently enough to fully understand the processes, impacts of water quality issues and what solutions are available This study investigated flushing time in Erakor lagoon and Port Vila Bay, Vanuatu using a numerical model developed in Delft3D. Microbial contamination by Escherichia coli was detected in multiple locations in the lagoon system with counts exceeding thresholds related to human health concerns. Modelling demonstrated a poor flushing time overall with a further decrease as the influence of waves and wind increased, especially ...
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    In Small Island Developing States (SIDS), water pollution is not monitored or assessed frequently enough to fully understand the processes, impacts of water quality issues and what solutions are available This study investigated flushing time in Erakor lagoon and Port Vila Bay, Vanuatu using a numerical model developed in Delft3D. Microbial contamination by Escherichia coli was detected in multiple locations in the lagoon system with counts exceeding thresholds related to human health concerns. Modelling demonstrated a poor flushing time overall with a further decrease as the influence of waves and wind increased, especially in Vila Bay. Sea level rise resulted in an increase in flushing time downstream of the lagoon near the open sea, while with a decrease upstream and in Vila Bay. Based on these results, we recommend long-term continuous monitoring and identification of higher risks areas to prioritise decisions around wastewater management.
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    Journal Title
    Marine Pollution Bulletin
    Volume
    173
    Issue
    Part A
    DOI
    https://doi.org/10.1016/j.marpolbul.2021.112938
    Subject
    Environmental geography
    Pollution and contamination
    Marine and estuarine ecology (incl. marine ichthyology)
    Hydrology
    E. coli
    Lagoon
    Residence time
    Vanuatu
    Water quality
    Publication URI
    http://hdl.handle.net/10072/408253
    Collection
    • Journal articles

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