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.

皮特雷次盆地海洋环境调查GA-0335（编号SOL5463）由索兰德号科考船（RV Solander）于2012年5月执行，作为澳大利亚联邦政府国家低排放煤炭倡议（National Low Emission Coal Initiative, NLECI）的项目组成部分。本次调查由澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）与澳大利亚地质调查局（Geoscience Australia, GA）合作开展。调查旨在获取皮特雷次盆地两个目标区域内、水深小于100米的浅海海底环境的地球物理与生物物理数据，以支撑上述区域的二氧化碳封存潜力研究。本数据集包含一幅解译地貌图。
研究团队针对皮特雷次盆地的每个调查区域，采用分辨率为2米的多波束测深（multibeam bathymetry）与反向散射网格数据，以及水深衍生数据（如坡度、1米等高线），制作了局部尺度解译地貌图。本次研究识别并填绘了5类地貌单元：岸滩（bank）、平原（plain）、脊地（ridge）、台地（terrace）与谷地（valley），并采用适配局部尺度的解译规范（标称比例尺1:10000）完成相关工作。所有地图与多边形要素均通过ArcGIS软件的空间分析（Spatial Analyst）与3D分析（3D Analyst）工具箱完成手动数字化。