Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets

<p>High-resolution bathymetry forms critical datasets for marine geoscientists. It can be used to characterize the seafloor and its marine habitats, to understand past sedimentary records, and even to support the development of offshore engineering projects. Most methods to acquire bathymetry...

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Autores principales:	U. Lebrec, V. Paumard, M. J. O'Leary, S. C. Lang
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Environmental sciences GE1-350 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/e359a670f04c4f6d87d41a44583a1b83
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spelling	oai:doaj.org-article:e359a670f04c4f6d87d41a44583a1b832021-11-05T09:53:27ZTowards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets10.5194/essd-13-5191-20211866-35081866-3516https://doaj.org/article/e359a670f04c4f6d87d41a44583a1b832021-11-01T00:00:00Zhttps://essd.copernicus.org/articles/13/5191/2021/essd-13-5191-2021.pdfhttps://doaj.org/toc/1866-3508https://doaj.org/toc/1866-3516<p>High-resolution bathymetry forms critical datasets for marine geoscientists. It can be used to characterize the seafloor and its marine habitats, to understand past sedimentary records, and even to support the development of offshore engineering projects. Most methods to acquire bathymetry data are costly and can only be practically deployed in relatively small areas. It is therefore critical to develop cost-effective and advanced techniques to produce regional-scale bathymetry datasets.</p> <p>This paper presents an integrated workflow that builds on satellites images and 3D seismic surveys, integrated with historical depth soundings, to generate regional high-resolution digital elevation models (DEMs). The method was applied to the southern half of Australia's North West Shelf and led to the creation of new high-resolution bathymetry grids, with a resolution of 10 <span class="inline-formula">×</span> 10 m in nearshore areas and 30 <span class="inline-formula">×</span> 30 m elsewhere.</p> <p>The vertical and spatial accuracy of the datasets have been assessed using open-source Laser Airborne Depth Sounder (LADS) and multibeam echosounder (MBES) surveys as a reference. The comparison of the datasets indicates that the seismic-derived bathymetry has a vertical accuracy better than 1 m <span class="inline-formula">+</span> 2 % of the absolute water depth, while the satellite-derived bathymetry has a depth accuracy better than 1 m <span class="inline-formula">+</span> 5 % of the absolute water depth. This 30 <span class="inline-formula">×</span> 30 m dataset constitutes a significant improvement of the pre-existing regional 250 <span class="inline-formula">×</span> 250 m grid and will support the onset of research projects on coastal morphologies, marine habitats, archaeology, and sedimentology.</p> <p>All source datasets are publicly available, and the methods are fully integrated into Python scripts, making them readily applicable elsewhere in Australia and around the world. The regional digital elevation model and the underlying datasets can be accessed at <a href="https://doi.org/10.26186/144600">https://doi.org/10.26186/144600</a> (Lebrec et al., 2021).</p>U. LebrecU. LebrecV. PaumardM. J. O'LearyS. C. LangCopernicus PublicationsarticleEnvironmental sciencesGE1-350GeologyQE1-996.5ENEarth System Science Data, Vol 13, Pp 5191-5212 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Geology QE1-996.5
spellingShingle	Environmental sciences GE1-350 Geology QE1-996.5 U. Lebrec U. Lebrec V. Paumard M. J. O'Leary S. C. Lang Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets
description	<p>High-resolution bathymetry forms critical datasets for marine geoscientists. It can be used to characterize the seafloor and its marine habitats, to understand past sedimentary records, and even to support the development of offshore engineering projects. Most methods to acquire bathymetry data are costly and can only be practically deployed in relatively small areas. It is therefore critical to develop cost-effective and advanced techniques to produce regional-scale bathymetry datasets.</p> <p>This paper presents an integrated workflow that builds on satellites images and 3D seismic surveys, integrated with historical depth soundings, to generate regional high-resolution digital elevation models (DEMs). The method was applied to the southern half of Australia's North West Shelf and led to the creation of new high-resolution bathymetry grids, with a resolution of 10 <span class="inline-formula">×</span> 10 m in nearshore areas and 30 <span class="inline-formula">×</span> 30 m elsewhere.</p> <p>The vertical and spatial accuracy of the datasets have been assessed using open-source Laser Airborne Depth Sounder (LADS) and multibeam echosounder (MBES) surveys as a reference. The comparison of the datasets indicates that the seismic-derived bathymetry has a vertical accuracy better than 1 m <span class="inline-formula">+</span> 2 % of the absolute water depth, while the satellite-derived bathymetry has a depth accuracy better than 1 m <span class="inline-formula">+</span> 5 % of the absolute water depth. This 30 <span class="inline-formula">×</span> 30 m dataset constitutes a significant improvement of the pre-existing regional 250 <span class="inline-formula">×</span> 250 m grid and will support the onset of research projects on coastal morphologies, marine habitats, archaeology, and sedimentology.</p> <p>All source datasets are publicly available, and the methods are fully integrated into Python scripts, making them readily applicable elsewhere in Australia and around the world. The regional digital elevation model and the underlying datasets can be accessed at <a href="https://doi.org/10.26186/144600">https://doi.org/10.26186/144600</a> (Lebrec et al., 2021).</p>
format	article
author	U. Lebrec U. Lebrec V. Paumard M. J. O'Leary S. C. Lang
author_facet	U. Lebrec U. Lebrec V. Paumard M. J. O'Leary S. C. Lang
author_sort	U. Lebrec
title	Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets
title_short	Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets
title_full	Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets
title_fullStr	Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets
title_full_unstemmed	Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets
title_sort	towards a regional high-resolution bathymetry of the north west shelf of australia based on sentinel-2 satellite images, 3d seismic surveys, and historical datasets
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/e359a670f04c4f6d87d41a44583a1b83
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Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets

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