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- W4254100511 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Estuaries are key reactive ecosystems along the landâocean aquatic continuum, with significant ecological and economic value. However, they have been facing strong morphological management changes and increased nutrient and contaminant inputs, possibly leading to ecological problems such as coastal eutrophication. Therefore, it is necessary to quantify the import and export fluxes of the estuaries, their retention capacity, and estuarine eutrophication potential. The 1-D Carbon-Generic Estuary Model (C-GEM) was used to simulate the transient hydrodynamics, transport, and biogeochemistry for estuaries with different sizes and morphologies along the French Atlantic coast during the period 2014â2016 using readily available geometric, hydraulic, and biogeochemical data. These simulations allowed us to evaluate the budgets of the main nutrients (phosphorus â P; nitrogen â N; silica â Si) and total organic carbon (TOC), and their imbalance, providing insights into their eutrophication potential. Cumulated average annual fluxes to the Atlantic coast from the seven estuaries studied were 9.6âktâPâyr<span class=inline-formula><sup>â1</sup></span>, 259âktâNâyr<span class=inline-formula><sup>â1</sup></span>, 304âktâSiâyr<span class=inline-formula><sup>â1</sup></span>, and 145âktâCâyr<span class=inline-formula><sup>â1</sup></span>. Retention rates varied depending on the estuarine residence times, ranging from 0â%â27â% and 0â%â34â% to 2â%â39â% and 8â%â96â% for total phosphorus (TP), total nitrogen (TN), dissolved silica (DSi), and TOC, respectively. Large-scale estuaries had higher retention rates than medium and small estuaries, which we interpreted in terms of estuarine residence times. As shown by the indicator of eutrophication potential (ICEP), there might be a risk of coastal eutrophication, i.e., the development of non-siliceous algae that is potentially harmful to the systems studied due to the excess TN over DSi. This study also demonstrates the ability of our model to be applied with a similar setup to several estuarine systems characterized by different sizes, geometries, and riverine loads." @default.
- W4254100511 created "2022-05-12" @default.
- W4254100511 creator A5046549212 @default.
- W4254100511 date "2021-09-22" @default.
- W4254100511 modified "2023-09-25" @default.
- W4254100511 title "Reply on RC2" @default.
- W4254100511 doi "https://doi.org/10.5194/bg-2021-164-ac2" @default.
- W4254100511 hasPublicationYear "2021" @default.
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