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.

彼得尔次盆地海洋环境调查（GA-0335，SOL5463）由“索兰德号”考察船于2012年5月开展，是联邦政府国家低排放煤炭计划（NLECI）的一部分。该调查由澳大利亚海洋科学研究所（AIMS）与GA合作实施，旨在获取彼得尔次盆地内两个目标区域浅海（水深小于100米）海底环境的地球物理与生物物理数据，为这些区域的二氧化碳封存潜力研究提供支持。本数据集包含一幅解译地貌图。

针对彼得尔次盆地各调查区域，利用2米分辨率的多波束测深、反向散射栅格及测深衍生数据（如坡度、1米等高线）生成局域尺度地貌解译图。基于适用于局域尺度（标称比例尺1:10000）解译的定义，识别并绘制了五种地貌单元：浅滩、平原、脊、阶地和谷地。地图与多边形数据通过ArcGIS的空间分析及3D分析工具箱进行人工数字化处理。