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Joseph Leach and Ralph Roob Dept of Geomatics, University of Melbourne, Parkville, Victoria.

The Use Of Side-Scan Sonar Terrain As A Surrogate for Habitat Mapping: Case Studies From Victorian Marine National Parks. Joseph Leach and Ralph Roob Dept of Geomatics, University of Melbourne, Parkville, Victoria. EdgeTech LC-100 Side-scan Sonar. Biologist diver reeling out transect line.

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Joseph Leach and Ralph Roob Dept of Geomatics, University of Melbourne, Parkville, Victoria.

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  1. The Use Of Side-Scan Sonar Terrain As A Surrogate for Habitat Mapping: Case Studies From Victorian Marine National Parks. Joseph Leach and Ralph Roob Dept of Geomatics, University of Melbourne, Parkville, Victoria.

  2. EdgeTech LC-100 Side-scan Sonar

  3. Biologistdiver reeling out transect line

  4. Layout of transects for underwater visual census of fish and invertebrates 2 x 5m wide fish transect lane 100m 50m 0m 50m 100m T4 T3 T2 T1 1m wide invertebrate transect lane

  5. Side-scan sonar image with colour coded diver transect Richness of fish species —> 20 —15 – 20 —10 – 15 —5 – 10 —0 – 5

  6. Derived relief map based on texture analysis of side-scan sonar image and profile generated by normal incident sonar Relief index 1 Relief index 2 Relief index 3 Relief index 4 Relief index 5 Diver transects

  7. Echogram representing the bottom pick on the first return echo The linear distance of the bottom pick when compared to that of the horizontal, provides an indication of relief

  8. The End

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