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.

皮特里次盆地（Petrel Sub-basin）海洋环境调查GA-0335（SOL5463）由索兰德号科考调查船（RV Solander）于2012年5月实施，作为澳大利亚联邦政府国家低排放煤炭倡议（NLECI）的项目组成部分。本次调查由澳大利亚海洋科学研究所（AIMS）与GA合作开展。本次调查旨在获取皮特里次盆地两个目标区域内浅海（水深小于100米）海底环境的地球物理与生物物理数据，以支撑该区域二氧化碳封存潜力的相关调查研究。本数据集包含一幅解译地貌图。针对皮特里次盆地的各调查区域，研究团队采用分辨率为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（如坡度、1米等高线），生成了解译的局地尺度地貌图。本次研究识别并划定了5类地貌单元：岸滩、平原、脊、阶地与谷地，采用适配局地尺度解译的定义（标称比例尺为1:10000）。所有地貌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。