Preprints
https://doi.org/10.5194/essd-2021-350
https://doi.org/10.5194/essd-2021-350

  09 Dec 2021

09 Dec 2021

Review status: this preprint is currently under review for the journal ESSD.

Concentrations and fluxes of suspended particulate matters and associated contaminants in the Rhône River from Lake Geneva to the Mediterranean Sea

Hugo Lepage1, Alexandra Gruat2, Fabien Thollet2, Jérôme Le Coz2, Marina Coquery2, Matthieu Masson2, Aymeric Dabrin2, Olivier Radakovitch1, Jérôme Labille3, Jean-Paul Ambrosi3, Doriane Delanghe3, and Patrick Raimbault4 Hugo Lepage et al.
  • 1Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-ENV, SRTE/LRTA, BP 3, 13115 Saint-Paul-lez-Durance, France
  • 2INRAE, UR RiverLy, 5 Rue de la Doua CS 20244, Villeurbanne F-69625, France
  • 3Aix-Marseille Univ, CNRS, IRD, INRA, Coll France, CEREGE, 13545 Aix-en-Provence, France
  • 4Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO), UM110, 13288 Marseille, France

Abstract. The Rhône River is amongst the main rivers of Western Europe and the biggest by freshwater discharge and sediment delivery to the Mediterranean Sea. Its catchment is characterized by distinct hydrological regimes that may produce annual sediment deliveries ranging from 1.4 to 18.0 Mt y−1. Furthermore, the course of the Rhône River meets numerous dams, hydro- and nuclear power plants, and agricultural, urban or industrial areas. Thus, suspended particulate matters (SPM) have been involved in the fate of hydrophobic contaminants such as polychlorobiphenyls (PCB), mercury (Hg) and other trace metal elements (TME), and radionuclides for decades. To investigate the concentrations and the fluxes of SPM and associated contaminants, as well as their sources, a monitoring network of 15 stations (three on the Rhône River and 12 on tributaries, from Lake Geneva to the Mediterranean Sea) has been set up in the past decade within the Rhône Sediment Observatory (OSR). A main purpose of this observatory is to assess the long term trend of the main contaminant concentrations and fluxes, and to understand their behavior during extreme events such as floods or dam flushing operations. The dataset presented in this paper contains the concentrations and fluxes of SPM as well as the concentrations and fluxes of several particle bound contaminants of concern (PCB, TME, radionuclides), the particle size distribution and the particulate organic carbon of SPM. Sediment traps or continuous flow centrifuges were used to collect sufficient amount of SPM in order to conduct the measurements. This observatory is on-going since 2011 and the database is regularly updated. All the data are made publicly available in French and English through the BDOH/OSR database at https://doi.org/10.15454/RJCQZ7 (Lepage et al., 2021).

Hugo Lepage et al.

Status: open (until 03 Feb 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-350', Anonymous Referee #1, 26 Dec 2021 reply
    • AC1: 'Reply on RC1', Hugo Lepage, 17 Jan 2022 reply
      • RC3: 'Reply on AC1', Anonymous Referee #1, 17 Jan 2022 reply
  • RC2: 'Comment on essd-2021-350', Anonymous Referee #2, 06 Jan 2022 reply
    • AC2: 'Reply on RC2', Hugo Lepage, 19 Jan 2022 reply
      • CC1: 'Reply on AC2', Hugo Lepage, 19 Jan 2022 reply

Hugo Lepage et al.

Data sets

Concentrations and fluxes of suspended particulate matters and associated contaminants in the Rhône River from Lake Geneva to the Mediterranean Sea Lepage, Hugo; Gruat, Alexandra; THOLLET, FABIEN; Le Coz, Jérôme; Coquery, Marina; Masson, Matthieu; Dabrin, Aymeric; Radakovitch, Olivier; Eyrolle, Frédérique; Labille, Jérôme; Ambrosi Jean-Paul; Delanghe, Doriane; Raimbault, Patrick https://doi.org/10.15454/RJCQZ7

Hugo Lepage et al.

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Short summary
The dataset contains concentrations and fluxes of suspended particle matters (SPM) and several particles-bound contaminants along the Rhône River downstream of Lake Geneva. These data allow us to understand their dynamic and origins. They show the impact of flood events which mainly conduct to a decrease in the contaminant concentrations while their fluxes are significant. On the contrary, concentrations are higher during low flow periods, probably due to the increase of organic matter.