Dunkirk offshore wind farm - Sedimentological data collected on the study area

Description

A site characterization study was conducted by Shom on the EMR study area of Dunkirk in 2016 and 2017. As part of the "sedimentology" component of this study, various data were collected: sediment sampling, turbidity measurements, seismic data from sediment probes, SMF imaging... - Sedimentary sampling / Granulometry: 39 samples taken from the Van Veen dumpster in 2016 and 2017 (sampling, measurement of granularity by sieving on a column of mesh sieves, measurement of calcium carbonate using a conventional Bernard, calculation of particle size parameters). November 2017. - Turbidity: monitoring of turbidity through two anchorages (benthic stations equipped with optical turbidity meters). Analysis of background turbidity time series: time series acquired from 1/09/2016 to 23/09/2016 for anchorage No 1 and from 6/09/2016 to 9/10/2016 for anchorage No 2 - Seismic: Seismic profiles acquired from the sediment probe (THR data). Large-volume .XTF files (manufacturer format) which can be accessed on request. Accessible data: - Sedimentary sampling / Granulometry: EMRDunkerqueGRANULOMETRIE_Synthese.xls. Content: Sample number, immersion, Lat, Long, MGS, sorting, skew, Medium grain mm, porosity, density, speed, Folk, Study, Shom, CaCO3, Pebbles, Gravel, Sand, Fine sand, Vase, Roughness, SSC, Code Add, Pebbles, Large gravel, Small gravel, Gravel sand, Medium sand, Fine sand, Very fine sand, Silts, Clay + camemberts of distribution by ganularity class - Turbidity: EMRDunkerqueTURBIDITE_Synthese.xls. Content: Date/time, turbidity level (NTU) Horizontal references: WGS84 assimilated to the RGF93 geodetic system (difference of 65 cm between the two systems, taken into account in the balance of theoretical errors); Lambert93 projection Vertical references: ZH in Dunkirk for the probes, the vertical reference of the altitudes is the zero of the NGF-IGN system 1969.

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  • milieux-marins
  • donnees-ouvertes
  • eolien
  • sedimentologie
  • emr

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