Modelled seabed sediment average grain size in the Mediterranean
Sediment average grain size in the Mediterranean was generated from sediment categories. This rough granulometry estimate may be used for habitat models at meso- and large scale.
Simple
- Date (Creation)
- 2020-04-01
- Date (Publication)
- 2020-04-01
- Credit
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Ifremer
- Point of contact
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Organisation name Individual name Electronic mail address Role Ifremer
Sandrine Vaz
Author AMOP
Margaux Llapasset
Author Ifremer
sextant
Publisher
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Thèmes Sextant
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/Physical Environment/Geology/Seabed Nature
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GEMET - INSPIRE themes, version 1.0
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Habitats and biotopes
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DCSMM : Descripteurs
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D1: Deep-sea benthic habitats
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D6: Sea-floor Integrity
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Sous-regions marines
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Western Mediterranean
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Thématiques - SIMM
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/Environmental Status/Geology
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/Environmental Status/Habitats
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Research
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- Use limitation
- CC-BY-NC-SA (Creative Commons - Attribution, Pas d’utilisation commerciale, Partage dans les mêmes conditions)
- Access constraints
- Other restrictions
- Use constraints
- Copyright
- Spatial representation type
- Grid
- Language
- English
- Character set
- UTF8
- Topic category
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- Oceans
- Environment
- Reference system identifier
- EPSG / WGS 84 (EPSG:4326) / 8.6
- Number of dimensions
- 2
- Dimension name
- Vertical
- Dimension name
- Time
- Cell geometry
- Area
- Transformation parameter availability
- No
- Distribution format
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Name Version
- OnLine resource
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Protocol Linkage Name WWW:LINK
https://hal-normandie-univ.archives-ouvertes.fr/hal-02084698/document iso 16665
WWW:LINK-1.0-http--link
https://archimer.ifremer.fr/doc/00388/49975/ EUSeaMap.A European broad-scale seabed habitat map
WWW:LINK
https://www.emodnet-seabedhabitats.eu/about/euseamap-broad-scale-maps/ EUSeaMap 2019, EUNIS full detail classification
OGC:WMS
https://sextant.ifremer.fr/services/wms/galion Sediment_avg_grain_size_Med
COPYFILE
Sediment_avg_grain_size_Med
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--metadata-URL
https://doi.org/10.12770/522f867b-f8b0-412c-8e4a-5a49980856f8 Digital Object Identifier (DOI)
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Explanation
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See the referenced specification
- Description
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Sediment average grain size in French Mediterranean waters was generated from sediment categories.
EUSeaMap sediment map of the Mediterranean was used to obtain sediment distribution, grain size range (mm) per sediment group and % fraction of each main sediment group (Rock, coarse and mixed sediment, mixed sediment, sand, muddy sand, sandy mud, fine mud or sandy mud, fine mud). Upper and lower boundaries for rock, pebble and clay size were derived from iso 16665 description. Fraction per category were derived from Folk (1954) sediment classification modified after EUSeaMap European broad-scale seabed habitat map description of categories (EUNIS L3 classes) for Mediterranean and Black Sea.
Folk, R. L., 1954. The distinction between grain size and mineral composition in sedimentary rock nomenclature, Jour. Geology 62, 344–359.
- Description
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Römkens et al. (1997) equation enabling the estimation of average grain size from sediment typologie and fraction was applied:
X = exp[ 0.01 * SUM( fi * ln( mi ) ) ]
where X :average grain size (mm) ; mi : estimated average grain size of ith sediment category (mm) and ; fi : corresponding fraction of mi (%).
Römkens, M. J. M., Young, R. A., Poesen, J. W. A., McCool, D. K., El-Swaify, S. A., & Bradford, J. M., 1997. Soil erodibility factor (K). Renard KG et al., Predicting soil erosion by water: a guide to conservation planning with the Revised Universal Soil Loss Equation (RUSLE). USDA Agriculture Handbook, (703), 65-99.
- Description
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Sediment categories were recoded with the computed average grain size and the layer was transformed in geotiff.
The categories - grain size correspondance are:
"fine mud" = 0.031525 mm, "mud" = 0.03781531 mm, "sandy mud" = 0.09243549 mm, "Fine mud or sandy mud or muddy sand" = 0.17008322 mm, "muddy sand" = 0.386289173 mm, "sand" = 0.94424275 mm, "mixed sediment" = 1.67029356 mm, "coarse & mixed sediment" = 6.34059641 mm, "Rock or other hard substrata" = 2032 mm
Metadata
- File identifier
- 522f867b-f8b0-412c-8e4a-5a49980856f8 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2024-05-21T08:49:56.073Z
- Metadata standard name
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ISO 19115:2003/19139 - SEXTANT
- Metadata standard version
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1.0