Seabed NSW

The SeaBed NSW program provides data on the structure and composition of the seabed adjacent to our beaches. This program is funded through the NSW Coastal Reforms, combined with data from other sources. It improves our understanding of connectivity between coastal (beaches, estuaries) and marine environments, enabling improved approaches to managing and predicting the impacts of human activities, severe storms and climate change.\r\n\r\nThe program builds on the research expertise and specialist capabilities developed in 2005 as part of the HABMAP program mapping seabed habitats of our marine estate. The SeaBed NSW project maps large areas of the seafloor on the inner continental shelf using airborne laser mapping (LADS) in shallow water depths and vessel-based multi-beam sonar further offshore. \r\n\r\nThe program contributes to the goal of a continuous high-resolution digital elevation model (DEM) for the entire NSW coast. This new marine LiDAR data builds significantly on our existing database; provides a more accurate 3D surface for our wave modelling tools, enables us to answer questions about how sand moves around the coastal-marine environment and provide baseline information from which to measure change.\r\n\r\nSeabed data is generated by collating and analysing bathymetric and marine sediment datasets, and seabed habitats defined from swath acoustic surveys and aerial photography. Data from approximately 120 kilometres of vessel-towed underwater video surveys is also used to allow field validation of swath acoustic data and a description of the visually dominant sessile biota over large areas of the seabed.\r\n\r\nAn understanding of what type of seabed there is, what it is made of and what is living there is critical so we can better manage coastal hazards and risk for NSW and ensure there are viable and healthy marine ecosystems for the future.\r\nThe data are intended to inform coastal and marine management and should not be used for navigation without additional processing.\r\n\r\nThe Seabed NSW program has developed and issued the following datasets:\r\n\r\n* [NSW Marine LiDAR Topo-Bathy 2018 Geotif](https://datasets.seed.nsw.gov.au/dataset/marine-lidar-topo-bathy-2018)\r\n* [NSW seabed landforms derived from marine lidar data 2022](https://datasets.seed.nsw.gov.au/dataset/nsw-seabed-landforms-derived-from-marine-lidar-data-2022)\r\n* [Shellharbour seabed landforms derived from multibeam echosounder data 2022](https://datasets.seed.nsw.gov.au/dataset/shellharbour-seabed-landforms-derived-from-mbes-data-2022)\r\n* [Wollongong seabed landforms derived from multibeam echosounder data 2022](https://datasets.seed.nsw.gov.au/dataset/wollongong-seabed-landforms-derived-from-mbes-data-2022)\r\n* [HABMAP Multi-beam Survey Coverage Areas](https://datasets.seed.nsw.gov.au/dataset/habmap-multi-beam-survey-coverage-areasd74ae)\r\n* [Single Beam Bathymetry & Coastal Topography Survey Coverage Areas - Coastal Marine Unit](https://datasets.seed.nsw.gov.au/dataset/single-beam-survey-coverage-areas-coastal-marine-unit883fa)\r\n* [NSW Environment Multi Beam Echo Sounder Gridded Data](https://datasets.seed.nsw.gov.au/dataset/nsw-environment-multibeam-survey-gridded-bathymetry-and-backscatter-datasets)\r\n* [NESP Biodiversity Hub Hunter Marine Park Multi Beam Echo Sounder Surveys](https://datasets.seed.nsw.gov.au/dataset/nesp-biodiversity-hub-nsw-dpie-hunter-marine-park-towed-video-imagery-clone-27f1)\r\n\r\n

新南威尔士州海床项目（SeaBed NSW）为邻近沿岸海滩的海床结构与组成提供数据支撑。本项目由新南威尔士州海岸改革计划（NSW Coastal Reforms）资助，并整合了其他来源的数据集。该项目有助于加深我们对海岸（海滩、河口）与海洋环境之间连通性的认知，助力优化人类活动、强风暴及气候变化影响的管理与预测方案。

本项目依托2005年作为HABMAP项目组成部分所积累的研究专长与专业能力——该项目旨在绘制所辖海域的海床生境分布图。新南威尔士州海床项目针对大陆架内侧的大片海床开展测绘工作：浅水区采用机载激光测绘系统（LADS），远海区域则使用船载多波束声呐。

本项目助力实现新南威尔士州全域海岸连续高分辨率数字高程模型（DEM）的构建目标。这套全新的海洋激光雷达（LiDAR）数据极大丰富了现有数据库：可为海浪模拟工具提供更精准的三维地表数据，助力解答海岸-海洋环境内的泥沙运移问题，并为环境变化监测提供基准参考信息。

海床数据通过整合与分析水深测量与海洋沉积物数据集，并结合条带式声学调查与航空摄影所界定的海床生境信息生成。此外，项目还利用约120公里船载拖曳式水下视频调查所获取的数据，对条带式声学调查数据进行野外验证，并对大片海床内视觉占比优势的固着生物群落进行描述。

明晰海床类型、组成及栖息生物种类至关重要，这有助于新南威尔士州优化海岸灾害与风险管控，并为未来构建健康且可持续的海洋生态系统提供保障。本数据集仅用于辅助海岸与海洋管理工作，未经额外处理不得用于航行用途。

新南威尔士州海床项目现已开发并发布以下数据集：
* [2018年新南威尔士州海洋激光雷达地形-水深数据（GeoTIFF格式）](https://datasets.seed.nsw.gov.au/dataset/marine-lidar-topo-bathy-2018)
* [2022年基于海洋激光雷达数据生成的新南威尔士州海床地貌数据集](https://datasets.seed.nsw.gov.au/dataset/nsw-seabed-landforms-derived-from-marine-lidar-data-2022)
* [2022年基于多波束回声测深仪数据生成的谢尔哈伯海床地貌数据集](https://datasets.seed.nsw.gov.au/dataset/shellharbour-seabed-landforms-derived-from-mbes-data-2022)
* [2022年基于多波束回声测深仪数据生成的伍伦贡海床地貌数据集](https://datasets.seed.nsw.gov.au/dataset/wollongong-seabed-landforms-derived-from-mbes-data-2022)
* [HABMAP多波束调查覆盖区域](https://datasets.seed.nsw.gov.au/dataset/habmap-multi-beam-survey-coverage-areasd74ae)
* [单波束水深测量与海岸地形调查覆盖区域——海岸海洋单元](https://datasets.seed.nsw.gov.au/dataset/single-beam-survey-coverage-areas-coastal-marine-unit883fa)
* [新南威尔士州环境多波束回声测深仪网格化数据](https://datasets.seed.nsw.gov.au/dataset/nsw-environment-multibeam-survey-gridded-bathymetry-and-backscatter-datasets)
* [NESP生物多样性中心亨特海洋公园多波束回声测深调查数据集](https://datasets.seed.nsw.gov.au/dataset/nesp-biodiversity-hub-nsw-dpie-hunter-marine-park-towed-video-imagery-clone-27f1)