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Bathymetric mapping of coral reefs in the Red Sea (Hurghada-Egypt) using Landsat7 ETM+ data
Vanderstraete, T.; Goossens, R.; Ghabour, T.K. (2002). Bathymetric mapping of coral reefs in the Red Sea (Hurghada-Egypt) using Landsat7 ETM+ data. Presented at the Seventh International Conference on Remote Sensing for Marine and Coastal Environments, Miami, Florida, 20-22 May 2002. [S.n.]: [s.l.]. 8 pp.

Available in  Authors 
    VLIZ: Open Repository 118892 [ OMA ]
Document type: Conference paper

Keywords
    Audiovisual materials > Graphics > Maps > Hydrographic charts > Bathymetric charts
    Reefs > Biogenic deposits > Coral reefs
    Remote sensing
    Remote sensing > Geosensing > Satellite sensing
    ISW, Red Sea, Hurghada
    Marine

Authors  Top 
  • Vanderstraete, T., more
  • Goossens, R., more
  • Ghabour, T.K., more

Abstract
    For monitoring threats posed on coral reefs a bathymetric map is useful as a base to locate vulnerable areas. For mapping shallow features as coral reefs in the Red Sea, conventional echo sounding methods are usually inappropriate due to the draught of the vessels used. Here remote sensing can bring a solution. Different methods have already been developed to map bathymetry using passive remote sensing. In this paper the modified Depth of Penetration mapping method suggested by Green et al. (2000) is implemented on a Landsat7 ETM+ image. This method is mainly based on the different attenuation coefficients of sequencing wavelengths in water. Using additional ground-truth observations, depths can be estimated. Although this method results in an acceptable bathymetric map, some deviations from groundtruth occur. These differences caused by errors inherent to the method used, field sampling or implementation, are examined and possible solutions are presented.

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