Defontaine Sophie, Jalon-Rojas Isabel, Sottolichio Aldo, Gratiot Nicolas, Legout Cédric, Lienart Camilla (2024). Settling dynamics of muddy sediment in the Gironde-Garonne system. SEANOE. https://doi.org/10.17882/98376

In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication :

Defontaine Sophie, Jalón‐Rojas Isabel, Sottolichio Aldo, Gratiot Nicolas, Legout Cédric, Lienart Camilla (2024). Factors Controlling Mud Floc Settling Velocity in a Highly Turbid Macrotidal Fluvial‐Estuarine System. Journal of Geophysical Research: Oceans, 129(10). https://doi.org/10.1029/2024JC021558

This deposit contains the data presented in a paper entitled "Factors controlling mud floc settling velocity in a highly turbid macrotidal fluvial-estuarine system" by Sophie Defontaine, Isabel Jalon-Rojas, Aldo Sottolichio, Nicolas Gratiot, Cédric Legout and Camilla Lienart, and submitted to JGR-Oceans.

## ADCP DATA :

- sensor: Workhorse Sentinel 600 KHz - files : ADCP_26sept2022.mat and ADCP_29sept2022.mat - date of sampling : 26/09/2022 and 29/09/2022 - sites of sampling : Bordeaux (France) and Fort Médoc (France)

Each ADCP data files contains: - 'U' : velocity component (m/s) projected the channel axis with positive values landward - 'V' : velocity component (m/s) directed laterally toward the right bank - 'Temps' : local time (UTC+2) - 'Profondeur' : depth (m)

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## MPx DATA :

- sensor: NKE MPx multiparameter probe - files : SMATCH_26sept2022.mat and SMATCH_29sept2022.mat - date of sampling : 26/09/2022 and 29/09/2022 - sites of sampling : Bordeaux (France) and Fort Médoc (France)

Each MPx data files contains: - 'TIME' : local time (UTC+2) - 'PROFONDEUR' : depth (m) - 'TURBIDITE' : turbidity (NTU) - 'SALINITE' : salinity (-) - 'MES' : suspended sediment concentration (g/L) - 'TEMPERATURE' : temperature (°C)

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## Settling velocity data :

- sensor: SCAF - files : ws_bottom_26092022.txt, ws_bottom_29092022.txt, ws_surface_26092022.txt and ws_surface_29092022.txt - headers of each files contains the following informations : sampling site, date, sampling water depth, unity, time zone and sampling time. - settling velocity distribution are presented in rows

!!! ws_bottom_26092022.txt file does not contains settling velocity distribution, because the suspended sediment concentration was too high and hence hindered settling occured. Only the settling velocity of the front is given. !!!

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## Organic matter content data:

- instrument: Thermo Finnigan Flash EA 1112 analyzer - file: Organic_matter.xlsx - Data are presented in a table containing: water depth of sampling (surface/bottom), sampling site, date and time of sampling, C/N (-), COP (µm/L), NOP (µm/L), MES (g/L) and COP/MES (%)

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## GRAIN SIZE DISTRIBUTION:

- instrument: Malvern laser-diffraction instrument - file : grain_size_distrib.ods - Data are presented in a table containing: sample name, date and time of sampling, site of sampling, depth, obscuration, residual-weighted, d (0.1), d (0.5), d (0.9), D [4, 3] - Volume weighted mean and Result Between User Sizes (Sizes in microns)