5b62e0c9-05ab-4b86-bd04-282fec733f87 2025-05-15T22:32:48.745818Z ISO 19115-3 - SEXTANT 1.0 2 false WGS 84 (EPSG:4326) EPSG 8.6 Modelled seabed sediment average grain size in French Mediterranean waters 2020-04-01 creation https://sextant.ifremer.fr/record/5b62e0c9-05ab-4b86-bd04-282fec733f87 Sediment average grain size in French Mediterranean waters was generated from sediment categories. This rough granulometry estimate may be used for habitat models at meso- and large scale. Ifremer Sandrine Vaz Ifremer Sandrine.Vaz@ifremer.fr author Margaux Llapasset AMOP author sextant Ifremer sextant@ifremer.fr publisher https://sextant.ifremer.fr/geonetwork/srv/api/records/5b62e0c9-05ab-4b86-bd04-282fec733f87/attachments/Sediment_avg_grain_size_Med_fr.jpg /Physical Environment/Geology/Seabed Nature Thèmes Sextant 2019-01-28 publication geonetwork.thesaurus.local.theme.sextant-theme Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2018-07-27 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme D1: Deep-sea benthic habitats D6: Sea-floor Integrity DCSMM : Descripteurs 2020-04-09 publication geonetwork.thesaurus.local.theme.dcsmm-descripteur Western Mediterranean Sous-regions marines 2020-06-04 publication geonetwork.thesaurus.local.place.dcsmm.area /Environmental Status/Geology /Environmental Status/Habitats Research Thématiques - SIMM 2021-10-18 publication geonetwork.thesaurus.local.theme.simm.thematiques CC-BY-NC-SA (Creative Commons - Attribution, Pas d’utilisation commerciale, Partage dans les mêmes conditions) grid utf8 oceans environment 2.22016117 11.36078617 40.45730294 44.16044508 http://sextant.ifremer.fr/record/52b3fb36-6101-4b10-a0ce-4ba82403f0d6/ WWW:LINK Base de Données Sédimentologiques du SHOM - BDSS https://sextant.ifremer.fr/Donnees/Catalogue#/metadata/e4f891f7-e495-4a9b-b557-5c2c6c653a2d WWW:LINK Sédimentologie - Méditerranée occidentale https://hal-normandie-univ.archives-ouvertes.fr/hal-02084698/document WWW:LINK iso 16665 https://sextant.ifremer.fr/services/wms/galion OGC:WMS Sediment_avg_grain_size_Med_fr COPYFILE Sediment_avg_grain_size_Med_fr RÈGLEMENT (UE) N o 1089/2010 DE LA COMMISSION du 23 novembre 2010 portant modalités d'application de la directive 2007/2/CE du Parlement européen et du Conseil en ce qui concerne l'interopérabilité des séries et des services de données géographiques 2010-12-08 publication See the referenced specification Sediment average grain size in French Mediterranean waters was generated from sediment categories. SHOM sediment map in the French Mediterranean waters was used to obtain sediment distribution, grain size range (mm) per sediment group and % fraction of each main sediment group (Rock, pebble, pebble and gravel, gravel,sand, sand and fine sand, fine sand, mud, silt and clay). Upper and lower boundaries for rock, pebble and clay size were derived from iso 16665 description. 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. Sediment categories were recoded with the computed average grain size and the layer was transformed in geotiff.