Petrel Sub-basin Marine Survey (GA-0335 / SOL5463) (NLECI Program) - interpreted geomorphic map

The Petrel Sub-basin Marine Environmental Survey GA-0335, (SOL5463) was undertaken by the RV Solander during May 2012 as part of the Commonwealth Government's National Low Emission Coal Initiative (NLECI). The survey was undertaken as a collaboration between the Australian Institute of Marine Science (AIMS) and GA. The purpose was to acquire geophysical and biophysical data on shallow (less then 100m water depth) seabed environments within two targeted areas in the Petrel Sub-basin to support investigation for CO2 storage potential in these areas. This dataset comprises an interpreted geomorphic map.

Interpreted local-scale geomorphic maps were produced for each survey area in the Petrel Sub-basin using multibeam bathymetry and backscatter grids at 2 m resolution and bathymetric derivatives (e.g. slope; 1-m contours). Five geomorphic units; bank, plain, ridge, terrace and valley, were identified and mapped using definitions suitable for interpretation at the local scale (nominally 1:10 000). Maps and polygons were manual digitised in ArcGIS using the spatial analyst and 3D analyst toolboxes.

佩特雷尔次盆地（Petrel Sub-basin）海洋环境调查GA-0335（SOL5463）由索兰德号调查船（RV Solander）于2012年5月实施，作为英联邦政府国家低排放煤炭倡议（National Low Emission Coal Initiative, NLECI）的组成部分。本次调查由澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）与GA联合开展，旨在采集佩特雷尔次盆地内两个目标区域浅水区（水深小于100米）的海底环境地球物理与生物物理数据，为上述区域的二氧化碳封存潜力调查提供支撑。本数据集包含一幅解译地貌图。
针对佩特雷尔次盆地的各调查区域，研究团队基于分辨率为2米的多波束测深（multibeam bathymetry）与反向散射网格（backscatter grids）数据，以及测深衍生数据（bathymetric derivatives，如坡度、1米等高线），生成了解译局地尺度地貌图。本次研究采用适配局地尺度（标称比例尺1:10000）的解译规范，共识别并绘制了5类地貌单元：滩脊、平原、脊岭、阶地与谷地。所有地图与多边形矢量要素均通过ArcGIS的空间分析（Spatial Analyst）与3D分析（3D Analyst）工具箱完成手动数字化。