FN Archimer Export Format
PT C
TI Can we simply predict maximum turbidity in tidal estuaries?
BT 
AF GRASSO, Florent
   BISMUTH, Eliott
   BURCHARD, Hans
   DEFONTAINE, Sophie
   DIJKSTRA, Yoeri
   GEYER, R
   KÖSTERS, Frank
   LAFITE, Robert
   REESE, Nina
   SCHUTTELAARS, Henk
   SOTTOLICHIO, Aldo
   VAN KESSEL, Thijs
   VANLEDE, Joris
   VAN MAREN, Bas
   VERNEY, Romaric
   WALTHER, Régis
   ZORNDT, Anna
AS 1:1;2:1;3:2;4:1;5:3;6:4;7:5;8:6;9:2;10:3;11:7;12:8;13:9;14:8,10;15:1;16:11;17:5;
FF 1:PDG-ODE-DYNECO-DHYSED;2:PDG-ODE-DYNECO-DHYSED;3:;4:PDG-ODE-DYNECO-DHYSED;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:PDG-ODE-DYNECO-DHYSED;16:;17:;
C1 Ifremer – DYNECO/DHYSED, France
   Leibniz Institute for Baltic Sea Research (IOW), Germany
   TU Delft, the Netherlands
   Woods Hole Oceanographic Institution (WHOI), USA
   Bundesanstalt für Wasserbau (BAW), Germany
   UMR M2C – Université de Rouen Normandie, France
   UMR EPOC – Université de Bordeaux, France
   DELTARES, the Netherlands
   Flanders Hydraulics, Belgium
   State Key Laboratory of Estuarine and Coastal Research (SKLEC), East China Normal University, China
   ARTELIA, France
C2 IFREMER, FRANCE
   LEIBNIZ INST BALT SEA RES (IOW), GERMANY
   UNIV DELFT, NETHERLANDS
   WHOI, USA
   BUNDESANSTALT FUR WASSERBAU (BAW), GERMANY
   UNIV ROUEN NORMANDIE, FRANCE
   UNIV BORDEAUX, FRANCE
   DELTARES, NETHERLANDS
   FLANDERS HYDRAULICS, BELGIUM
   UNIV EAST CHINA NORMAL, CHINA
   ARTELIA, FRANCE
SI BREST
SE PDG-ODE-DYNECO-DHYSED
UR https://archimer.ifremer.fr/doc/00867/97883/106984.pdf
LA English
DT Poster
AB Tidal estuaries are often characterized by estuarine turbidity maxima (ETM), impacting physical, biogeochemical, and ecological dynamics along the land-sea continuum. Mechanisms driving ETM formation are now relatively well understood and ETM responses to environmental conditions are well characterized. However, a realistic description of estuarine sediment dynamics currently requires extensive in-situobservations and fully-validated numerical modeling. Such time-consuming and costly approaches limit their use for estuary stakeholders.  The main goal of this study is to provide an estimate of the maximum suspended sediment concentration (SSC) that can be expected in tidal estuaries, based on key estuarine parameters, i.e., tidal range (a), river discharge, water depth (h), and estuary shape. Seven meso- to macro-tidal NW European estuaries have been analyzed using a combination of in-situ measurements and realistic numerical simulations (Elbe, Weser, Scheldt, Seine, Loire, Gironde, and Ems estuaries). These estuaries present contrasted estuarine forcing, in terms of tidal range (from 2 to 8 m), mean river discharge (from 100 to 900 m3/s), and estuary length (from 100 to 190 km). It results in maximum surface SSC ranging from 0.2 to 5 kg/m3. Results show that the classical parameter space used for estuarine circulation classification, based on the freshwater Froude number and mixing number, is not well adapted to SSC classification. It is mainly due to not considering tidal asymmetry effects. However, the relative tidal range (i.e., the tidal range over channel depth ratio, a/h) is more relevant than the mixing number to characterize estuarine SSC, as it is related to both tidal energy and tidal asymmetries. Therefore, Frf and a/h provide an interesting parameter space to classify ETM, where SSC primarily increases with a/h, and secondly increases with Frf (Figure 1). Nonetheless, the seven investigated estuaries correspond to strongly stratified and partially mixed environments, and a wider investigation of different estuarine systems has to be carried out to assess the limitation of the observed trends. 
PY 2023
PD DEC
ID 97883
ER

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