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The use of remote sensing and linear wave theory to model local wave energy around Alphonse Atoll, Seychelles

Journal Article


Abstract


  • This paper demonstrates a practical step-wise method for modelling wave energy at the landscape scale

    using GIS and remote sensing techniques at Alphonse Atoll, Seychelles. Inputs are a map of the benthic

    surface (seabed) cover, a detailed bathymetric model derived from remotely sensed Compact Airborne

    Spectrographic Imager (CASI) data and information on regional wave heights. Incident energy at the reef

    crest around the atoll perimeter is calculated as a function of its deepwater value with wave parameters

    (significant wave height and period) hindcast in the offshore zone using the WaveWatch III application

    developed by the National Oceanographic and Atmospheric Administration. Energy modifications are

    calculated at constant intervals as waves transform over the forereef platform along a series of reef

    profile transects running into the atoll centre. Factors for shoaling, refraction and frictional attenuation

    are calculated at each interval for given changes in bathymetry and benthic coverage type and a nominal

    reduction in absolute energy is incorporated at the reef crest to account for wave breaking. Overall

    energy estimates are derived for a period of 5 years and related to spatial patterning of reef flat surface

    cover (sand and seagrass patches).

Publication Date


  • 2011

Citation


  • Hamylton, S. (2011). The use of remote sensing and linear wave theory to model local wave energy around Alphonse Atoll, Seychelles. Estuarine, Coastal and Shelf Science, 95 (4), 349-358.

Scopus Eid


  • 2-s2.0-82955195423

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3767

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 349

End Page


  • 358

Volume


  • 95

Issue


  • 4

Abstract


  • This paper demonstrates a practical step-wise method for modelling wave energy at the landscape scale

    using GIS and remote sensing techniques at Alphonse Atoll, Seychelles. Inputs are a map of the benthic

    surface (seabed) cover, a detailed bathymetric model derived from remotely sensed Compact Airborne

    Spectrographic Imager (CASI) data and information on regional wave heights. Incident energy at the reef

    crest around the atoll perimeter is calculated as a function of its deepwater value with wave parameters

    (significant wave height and period) hindcast in the offshore zone using the WaveWatch III application

    developed by the National Oceanographic and Atmospheric Administration. Energy modifications are

    calculated at constant intervals as waves transform over the forereef platform along a series of reef

    profile transects running into the atoll centre. Factors for shoaling, refraction and frictional attenuation

    are calculated at each interval for given changes in bathymetry and benthic coverage type and a nominal

    reduction in absolute energy is incorporated at the reef crest to account for wave breaking. Overall

    energy estimates are derived for a period of 5 years and related to spatial patterning of reef flat surface

    cover (sand and seagrass patches).

Publication Date


  • 2011

Citation


  • Hamylton, S. (2011). The use of remote sensing and linear wave theory to model local wave energy around Alphonse Atoll, Seychelles. Estuarine, Coastal and Shelf Science, 95 (4), 349-358.

Scopus Eid


  • 2-s2.0-82955195423

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3767

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 349

End Page


  • 358

Volume


  • 95

Issue


  • 4