Acoustic mapping and monitoring of the seabed: From single-frequency to multispectral multibeam backscatter

Research output: ThesisDissertation (TU Delft)

2 Downloads (Pure)

Abstract

With the increasing human activities in the marine environment, such as fisheries, dredging, coastal protection or construction of marine infrastructure, seabed sediment and habitat mapping have become highly relevant for the development of sustainable marine management strategies. Compared to traditional mapping methods, primarily based on bed sampling, multibeam echosounding belongs to the cutting-edge technology to time-efficiently acquire high-resolution bathymetric and backscatter (BS) data over large areas. Using classification methods to combine the acoustic data with ground-truthing, large-scale maps can be automatically and objectively produced, that enables to describe the distribution of benthic habitats or quantify marine resources. However, acoustic sediment classification still does not allow to discriminate between the entire heterogeneity of the seabed and is generally applied to a single multibeam echosounder dataset by means of revealing the seabed state only at a given time instant. Two challenging issues addressed within the scope of this thesis are summarized as: (1) Investigation on the applicability of repetitive multibeam (single-frequency) BS measurements for monitoring the seabed; and (2) Evaluation of the potential of multispectral BS to increase the acoustic discrimination between different seabed environments.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Delft University of Technology
Supervisors/Advisors
  • Simons, D.G., Supervisor
  • Snellen, M., Supervisor
Thesis sponsors
Award date10 Sep 2020
Print ISBNs978-94-028-2129-1
DOIs
Publication statusPublished - 2020

Keywords

  • Multibeam echosounder
  • acoustic backscatter
  • sediment classification
  • habitat mapping
  • multispectral
  • coastal monitoring

Fingerprint Dive into the research topics of 'Acoustic mapping and monitoring of the seabed: From single-frequency to multispectral multibeam backscatter'. Together they form a unique fingerprint.

  • Research Output

    Mapping the seabed and shallow subsurface with multi-frequency multibeam echosounders

    Gaida, T. C., Mohammadloo, T. H., Snellen, M. & Simons, D. G., 2020, In : Remote Sensing. 12, 1, 24 p., 52.

    Research output: Contribution to journalArticleScientificpeer-review

    Open Access
    File
  • 4 Citations (Scopus)
    24 Downloads (Pure)

    Monitoring underwater nourishments using multibeam bathymetric and backscatter time series

    Gaida, T. C., van Dijk, T. A. G. P., Snellen, M., Vermaas, T., Mesdag, C. & Simons, D. G., 1 Jun 2020, In : Coastal Engineering. 158, 16 p., 103666.

    Research output: Contribution to journalArticleScientificpeer-review

    Open Access
    File
  • 1 Citation (Scopus)
    54 Downloads (Pure)
    Open Access
    File
  • 15 Citations (Scopus)
    59 Downloads (Pure)

    Cite this