Determination of Bathymetry, Benthic Habitat Classification and Water Quality From Optical Sensors

 

Figure: Satellite-derived bathymetry and habitat mapping of the coast of Yucatan (ARGANS, 2013).

 

Monitoring the bathymetry of shallow waters is crucial for near-shore activities, especially coastal preservation and design, and maintenance of coastal infrastructure.  The knowledge and monitoring of the seabed typology (benthic flora, type of substrate) and sea column water quality are also important as useful information resources towards environmental preservation policy-making and assessment of anthropogenic impact at sea.

Optical remote sensing of sea floor is limited to light penetration and vertical transparency. For turbid waters, it is near impossible to see and, thus, remotely sense the sea bottom (depth and habitat). Therefore, the research application proposed here is subdivided into four components:

  1. The processing of an indicator telling whether it is possible or not to sense the sea bottom with optical sensors;
  2. Retrieval of bathymetry;
  3. Classification of sea bottom; and
  4. Estimates of three water quality constituents, namely chlorophyll a, suspended particulate matter (SPM) and coloured dissolved organic matter (CDOM).

Previous efforts of harmonisation among the in situ datasets that are used internationally for validation purposes have been attempted, however availability of a fine and up-to-date seafloor classification scheme is rare. Co-ReSyF aims to fill this gap, and increase the communication between, and willingness of, users (scientists and citizens) to facilitate the production of improved benthic maps in Europe.

Posted on: 2nd June 2016, by : admin