An integrated high-resolution bathymetric model for the Danube Delta system.
| Title: | An integrated high-resolution bathymetric model for the Danube Delta system. |
|---|---|
| Authors: | Alaerts, Lauranne, Lambrechts, Jonathan, Randresihaja, Ny Riana, Vandenbulcke, Luc, Gourgue, Olivier, Hanert, Emmanuel, Grégoire, Marilaure |
| Source: | Earth System Science Data Discussions; 12/5/2024, p1-25, 25p |
| Subject Terms: | STANDARD deviations, ERROR rates, INTERPOLATION, RIPARIAN areas, BATHYMETRY |
| Abstract: | Acting as a buffer between the Danube and the Black Sea, the Danube Delta plays an important role in regulating the hydro-biochemical flows of this land-sea continuum. Despite its importance, very few studies have focused on the impact of the Danube Delta on the different fluxes between the Danube and the Black Sea. One of the first step to characterize this land-sea continuum is to describe the bathymetry of the Delta. However, there is no complete, easily accessible bathymetric data on all three branches of the Delta to support hydrodynamic, biogeochemical or ecological studies. In this study, we aim to fill this gap by combining 4 different datasets, three in the river and one for the riverbanks, each varying in density and spatial distribution, to create a high-resolution bathymetry dataset. The bathymetric data was interpolated on a hybrid curvilinear-unstructured mesh with an anisotropic Inverse Distance Weighting (IDW) interpolation method. The resulting product offers resolutions ranging from 2 m in a connection zone to 100 m in one of the straight unidirectional channel. Cross validation of the dataset underlined the importance of the data source spatial pattern, with average Root Mean Square Error (RRMSE) of 0.55 %, 6.3 % and 27.6 %, for river segments covered by the densest to the coarsest dataset. These error rates are comparable to those observed in bathymetry interpolation in rivers with similar source datasets. The bathymetry presented in this study is the first unique, high-resolution, comprehensive and easily accessible bathymetric model covering all three branches of the Danube Delta. It will serve as an input in a hydrodynamic model of the Danube Delta, with the aim of better understanding the role of the Delta in the land-sea continuum between the Danube and the Black Sea. The dataset is available at https://doi.org/10.5281/zenodo.14055741 (Alaerts et al., 2024). [ABSTRACT FROM AUTHOR] |
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| Database: | Complementary Index |
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| Items | – Name: Title Label: Title Group: Ti Data: An integrated high-resolution bathymetric model for the Danube Delta system. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Alaerts%2C+Lauranne%22">Alaerts, Lauranne</searchLink><br /><searchLink fieldCode="AR" term="%22Lambrechts%2C+Jonathan%22">Lambrechts, Jonathan</searchLink><br /><searchLink fieldCode="AR" term="%22Randresihaja%2C+Ny+Riana%22">Randresihaja, Ny Riana</searchLink><br /><searchLink fieldCode="AR" term="%22Vandenbulcke%2C+Luc%22">Vandenbulcke, Luc</searchLink><br /><searchLink fieldCode="AR" term="%22Gourgue%2C+Olivier%22">Gourgue, Olivier</searchLink><br /><searchLink fieldCode="AR" term="%22Hanert%2C+Emmanuel%22">Hanert, Emmanuel</searchLink><br /><searchLink fieldCode="AR" term="%22Grégoire%2C+Marilaure%22">Grégoire, Marilaure</searchLink> – Name: TitleSource Label: Source Group: Src Data: Earth System Science Data Discussions; 12/5/2024, p1-25, 25p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22STANDARD+deviations%22">STANDARD deviations</searchLink><br /><searchLink fieldCode="DE" term="%22ERROR+rates%22">ERROR rates</searchLink><br /><searchLink fieldCode="DE" term="%22INTERPOLATION%22">INTERPOLATION</searchLink><br /><searchLink fieldCode="DE" term="%22RIPARIAN+areas%22">RIPARIAN areas</searchLink><br /><searchLink fieldCode="DE" term="%22BATHYMETRY%22">BATHYMETRY</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Acting as a buffer between the Danube and the Black Sea, the Danube Delta plays an important role in regulating the hydro-biochemical flows of this land-sea continuum. Despite its importance, very few studies have focused on the impact of the Danube Delta on the different fluxes between the Danube and the Black Sea. One of the first step to characterize this land-sea continuum is to describe the bathymetry of the Delta. However, there is no complete, easily accessible bathymetric data on all three branches of the Delta to support hydrodynamic, biogeochemical or ecological studies. In this study, we aim to fill this gap by combining 4 different datasets, three in the river and one for the riverbanks, each varying in density and spatial distribution, to create a high-resolution bathymetry dataset. The bathymetric data was interpolated on a hybrid curvilinear-unstructured mesh with an anisotropic Inverse Distance Weighting (IDW) interpolation method. The resulting product offers resolutions ranging from 2 m in a connection zone to 100 m in one of the straight unidirectional channel. Cross validation of the dataset underlined the importance of the data source spatial pattern, with average Root Mean Square Error (RRMSE) of 0.55 %, 6.3 % and 27.6 %, for river segments covered by the densest to the coarsest dataset. These error rates are comparable to those observed in bathymetry interpolation in rivers with similar source datasets. The bathymetry presented in this study is the first unique, high-resolution, comprehensive and easily accessible bathymetric model covering all three branches of the Danube Delta. It will serve as an input in a hydrodynamic model of the Danube Delta, with the aim of better understanding the role of the Delta in the land-sea continuum between the Danube and the Black Sea. The dataset is available at https://doi.org/10.5281/zenodo.14055741 (Alaerts et al., 2024). [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of Earth System Science Data Discussions is the property of Copernicus Gesellschaft mbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.5194/essd-2024-529 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 25 StartPage: 1 Subjects: – SubjectFull: STANDARD deviations Type: general – SubjectFull: ERROR rates Type: general – SubjectFull: INTERPOLATION Type: general – SubjectFull: RIPARIAN areas Type: general – SubjectFull: BATHYMETRY Type: general Titles: – TitleFull: An integrated high-resolution bathymetric model for the Danube Delta system. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Alaerts, Lauranne – PersonEntity: Name: NameFull: Lambrechts, Jonathan – PersonEntity: Name: NameFull: Randresihaja, Ny Riana – PersonEntity: Name: NameFull: Vandenbulcke, Luc – PersonEntity: Name: NameFull: Gourgue, Olivier – PersonEntity: Name: NameFull: Hanert, Emmanuel – PersonEntity: Name: NameFull: Grégoire, Marilaure IsPartOfRelationships: – BibEntity: Dates: – D: 05 M: 12 Text: 12/5/2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 18663591 Titles: – TitleFull: Earth System Science Data Discussions Type: main |
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