AusBathyTopo (Torres Strait) 30m 2023 - A regional-scale depth model (20230006C)

The Australian Bathymetry and Topography (AusBathyTopo) Torres Strait dataset contains depth and elevation data compiled from all available data within the Torres Strait into a 30 m-resolution Digital Elevation Model (DEM). The Torres Strait lies at the northern end of the Great Barrier Reef (GBR), the largest coral reef ecosystem on Earth, and straddles the Arafura Sea to the west and the Coral Sea to the east.The Torres Strait area is bounded by Australia, Indonesia and Papua New Guinea. Bathymetry mapping of this extensive reef and shoal system is vital for the protection of the Torres Strait allowing for the safe navigation of shipping and improved environmental management.Over past ten years, deep-water multibeam surveys have revealed the highly complex continental slope canyons in deeper Coral Sea waters. Shallow-water multibeam surveys conducted by the US-funded Source-to-Sink program revealed the extensive Fly River delta deposits. Airborne LiDAR bathymetry acquired by the Australian Hydrographic Office cover most of the Torres Strait and GBR reefs, with coverage gaps supplemented by satellite derived bathymetry. The Geoscience Australia-developed National Intertidal DIgital Elevation Model (NIDEM) improves the source data gap along Australia’s vast intertidal zone.We acknowledge the use of the CSIRO Marine National Facility (https://ror.org/01mae9353 ) in undertaking this research.” The datasets used were collected by the Marine National Facility on 13 voyages (see Lineage for identification).All source bathymetry data were extensively edited as point clouds to remove noise, given a consistent WGS84 horizontal datum, and where possible, an approximate MSL vertical datum.The 30 m-resolution grid is a fundamental dataset to underpin marine habitat mapping, and can be used to accurately simulate water mixing within a whole-of-GBR scale hydrodynamic model.This dataset is not to be used for navigational purposes.

澳大利亚水深与地形（Australian Bathymetry and Topography，AusBathyTopo）托雷斯海峡数据集整合了托雷斯海峡内所有可获取的水深与高程数据，构建得到分辨率为30米的数字高程模型（Digital Elevation Model，DEM）。托雷斯海峡地处地球上最大的珊瑚礁生态系统——大堡礁（Great Barrier Reef，GBR）北端，西接阿拉弗拉海，东连珊瑚海。托雷斯海峡海域的周边国家为澳大利亚、印度尼西亚与巴布亚新几内亚。对这片广袤的礁滩系统开展水深测绘，对于托雷斯海峡的保护至关重要，可保障船舶安全航行并优化环境管理工作。近十年来，深水多波束测绘揭示了珊瑚海更深水域中极为复杂的大陆坡峡谷群。由美国资助的Source-to-Sink项目开展的浅水多波束勘测，探明了大面积的弗莱河三角洲沉积体。澳大利亚水文局获取的机载激光雷达水深测量数据覆盖了托雷斯海峡及大堡礁的大部分礁体，数据覆盖盲区则通过卫星反演水深数据进行补充。由澳大利亚地球科学局（Geoscience Australia）研发的全国潮间带数字高程模型（National Intertidal Digital Elevation Model，NIDEM），填补了澳大利亚广袤潮间带区域的源数据空白。本研究感谢澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation，CSIRO）海洋国家设施的使用支持，相关链接为https://ror.org/01mae9353。本次使用的数据集由海洋国家设施通过13次科考航次采集（具体标识详见谱系信息栏）。所有原始水深数据均以点云形式进行了全面编辑以去除噪声，并统一采用WGS84水平基准面；在可行范围内，还采用了近似平均海平面（Mean Sea Level，MSL）垂直基准面。该30米分辨率网格数据集是支撑海洋生境制图的基础数据，可用于在大堡礁全域尺度的水动力模型中精准模拟水体混合过程。本数据集不得用于导航用途。