Side-scan sonar techniques for the characterization of physical properties of artificial benthic habitats

Wen-Miin Tian About the author

Abstracts

Side-scan sonar observations conducted at Mito artificial habitat site in the southwest coast off Taiwan, documented the locations of both concrete cubic blocks (more than 10,000 units) and scrapped steel boats (39 units) deployed previously. Based on their geographic locations, the concrete cubic artificial reefs could be grouped into 14 reef sets. About 30% of the reefs were deployed out of the promulgated site area. For the purpose of artificial habitat site identification and fishery resources management, a database structure was designed to accommodate types and positions of reefs, information of reef sets, bathymetric contours, textures of bottom sediments and geomorphological characteristics. The effectiveness of Mito artificial habitat site was evaluated to be positive after the deployment of both concrete block reefs and steel boat reefs.

Artificial habitat; Side-scan sonar; Survey route design; Positioning of artificial reefs; Surficial sediments; Fishery resources


Observações com sonar de varredura lateral ao largo de Mito na costa sudoeste de Taiwan, revelou a localização de mais de 10.000 blocos de concreto e 39 embarcações de ferro assentados previamente como recifes artificiais. Com base nas imagens obtidas, os cubos de concreto formam 14 grupos separados. Cerca de 30% das unidades de concreto foram assentadas fora das áreas previstas. Para a identificacão correta dos recifes artificiais e manejo adequado dos recursos pesqueiros, foi organizada uma base de dados com informações sobre forma, materiais e posição, e arranjo espacial das unidades recifais, bem como dados de batimetria, natureza do sedimento do fundo e geomorfologia. A eficiência dos recifes artificiais de Mito foi avaliada positivamente após o assentamento tanto das unidades de concreto quanto das embarcações de ferro.

Habitat artificial; Sonar de varredura lateral; Desenho rota amostral; Posicionamento de recifes artificiais; Sedimentos superficiais; Recursos pesqueiros


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Publication Dates

  • Publication in this collection
    11 Oct 2011
  • Date of issue
    2011

History

  • Reviewed
    03 Apr 2011
  • Received
    20 May 2010
  • Accepted
    11 Apr 2011
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