CERF Underwater video and stills from SE Tasmania

Geoscience Australia carried out marine surveys in south-east Tasmania in 2008 and 2009 (GA0315) to map seabed bathymetry and characterise benthic environments through observation of habitats using underwater towed video. Data was acquired using the Tasmania Aquaculture and Fisheries Institute (TAFI) Research Vessel Challenger. Bathymetric mapping was undertaken in seven survey areas, including: Freycinet Pensinula (83 sq km, east coast and shelf); Tasman Peninsula (117 sq km, east coast and shelf); Port Arthur and adjacent open coast (17 sq km); The Friars (41 sq km, south of Bruny Island); lower Huon River estuary (39 sq km); D Entrecastreaux Channel (7 sq km, at Tinderbox north of Bruny Island), and; Maria Island (3 sq km, western side). Video characterisations of the seabed concentrated on areas of bedrock reef and adjacent seabed in all mapped areas, except for D Entrecastreaux Channel and Maria Island.The GA0315_SETasi folder contains video footage; the excel file is the video characterisation data. Underwater video footage represents raw data. Video characterisation dataset include percent cover of substate.

澳大利亚地质调查局（Geoscience Australia）于2008年与2009年在塔斯马尼亚东南部开展了编号为GA0315的海洋勘测项目，旨在通过水下拖曳视频观测栖息地，绘制海底水深地形（seabed bathymetry）并表征底栖环境（benthic environments）。本次勘测依托塔斯马尼亚水产与渔业研究所（TAFI）的“挑战者号”研究船实施。本次水深测绘共覆盖7个勘测区块，具体包括：菲欣纳半岛（Freycinet Peninsula，83平方千米，东海岸及陆架区域）、塔斯曼半岛（Tasman Peninsula，117平方千米，东海岸及陆架区域）、亚瑟港及邻近开放海岸（17平方千米）、修士群岛（The Friars，41平方千米，布鲁尼岛以南海域）、休恩河下游河口（39平方千米）、当特卡斯托海峡（D'Entrecasteaux Channel，7平方千米，位于布鲁尼岛以北的廷德博克区域）以及玛丽亚岛（3平方千米，西侧海域）。除当特卡斯托海峡与玛丽亚岛外，所有测绘区块的海底视频表征工作均聚焦于岩礁床及邻近海底区域。GA0315_SETasi文件夹存储了水下视频原始素材，配套的Excel文件则包含视频表征数据集。水下视频素材属于原始观测数据，该表征数据集涵盖了底质覆盖率的相关统计内容。