Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Modelling the distribution of hard seabed using calibrated multibeam acoustic backscatter data in a tropical, macrotidal embayment: Darwin Harbour, Australia

    Access Status
    Fulltext not available
    Authors
    Siwabessy, Justy
    Tran, M.
    Picard, K.
    Brooke, B.
    Huang, Z.
    Smit, N.
    Williams, D.
    Nicholas, W.
    Nichol, S.
    Atkinson, I.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Siwabessy, J. and Tran, M. and Picard, K. and Brooke, B. and Huang, Z. and Smit, N. and Williams, D. et al. 2018. Modelling the distribution of hard seabed using calibrated multibeam acoustic backscatter data in a tropical, macrotidal embayment: Darwin Harbour, Australia. Marine Geophysical Research. 39 (1-2): pp. 249-269.
    Source Title
    Marine Geophysical Research
    DOI
    10.1007/s11001-017-9314-7
    ISSN
    0025-3235
    School
    Centre for Marine Science and Technology
    URI
    http://hdl.handle.net/20.500.11937/72516
    Collection
    • Curtin Research Publications
    Abstract

    © 2017, The Author(s). Spatial information on the distribution of seabed substrate types in high use coastal areas is essential to support their effective management and environmental monitoring. For Darwin Harbour, a rapidly developing port in northern Australia, the distribution of hard substrate is poorly documented but known to influence the location and composition of important benthic biological communities (corals, sponges). In this study, we use angular backscatter response curves to model the distribution of hard seabed in the subtidal areas of Darwin Harbour. The angular backscatter response curve data were extracted from multibeam sonar data and analysed against backscatter intensity for sites observed from seabed video to be representative of “hard” seabed. Data from these sites were consolidated into an “average curve”, which became a reference curve that was in turn compared to all other angular backscatter response curves using the Kolmogorov–Smirnov goodness-of-fit. The output was used to generate interpolated spatial predictions of the probability of hard seabed (p-hard) and derived hard seabed parameters for the mapped area of Darwin Harbour. The results agree well with the ground truth data with an overall classification accuracy of 75% and an area under curve measure of 0.79, and with modelled bed shear stress for the Harbour. Limitations of this technique are discussed with attention to discrepancies between the video and acoustic results, such as in areas where sediment forms a veneer over hard substrate.

    Related items

    Showing items related by title, author, creator and subject.

    • Seabed biotope characterisation based on acoustic sensing
      Kloser, Rudolf J (2007)
      The background to this thesis is Australia’s Oceans Policy, which aims to develop an integrated and ecosystem-based approach to planning and management. An important part of this approach is the identification of natural ...
    • An investigation of the relationship between seabed type and benthic and bentho-pelagic biota using acoustic techniques
      Siwabessy, Paulus Justiananda Wisatadjaja (2001)
      A growing recognition of the need for effective marine environmental management as a result of the increasing exploitation of marine biological resources has highlighted the need for high speed ecological seabed mapping. ...
    • Acoustic seabed segmentation from direct statistical clustering of entire multibeam sonar backscatter curves.
      Hamilton, L.; Parnum, Iain (2011)
      A fast, simple method is presented to obtain acoustic seabed segmentation from multibeam sonar backscatter data, for situations where processed backscatter curves are already available. Unsupervised statistical clustering ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.