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Modeling flocculation processes : intercomparison of a size class-based model and a distribution-based model ArchiMer
Maerz, Joeran; Verney, Romaric; Wirtz, Kai; Feudel, Ulrike.
Modeling suspended particulate matter (SPM) dynamics is essential to calculate sediment transport budgets and to provide relevant knowledge for the understanding of biogeochemical cycles in coastal waters. Natural flocs are characterized by their size, shape, structure and density that determine their settling velocity and therefore their vertical as well as horizontal transport. During transport, several processes, in particular aggregation and fragmentation, alter these particle properties. In the present study, we compare two different 0D modeling approaches for flocculation processes, a size class-based (SCB) model and a distribution-based (DB) model that follows the first moment of the particle distribution function. The study leads to an improved...
Tipo: Text Palavras-chave: Suspended particulate matter (SPM); Flocculation/aggregation; Size class-based model; Distribution-based model; Tidal dynamics; Model comparison.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00027/13870/11064.pdf
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Dynamique des matières en suspension en mer cotière : caractérisation, quantification et interactions sédiments/matière organique ArchiMer
Chapalain, Marion.
The knowledge of suspended particulate matter (SPM) and turbidity dynamics in coastal waters is essential for studying marine ecosystems. Flocculation/deflocculation processes are crucial mechanisms controlling the dynamics of SPM physical characteristics and thus, the fate of these SPM in the environment. This PhD thesis focuses on the SPM characteristics and their dynamics in coastal waters, from tidal to annual scales, in response to hydrodynamic, hydrological and biological forcing that take place at the interface between estuaries and coastal seas. To this end, optical and acoustic sensors were deployed in situ through 6 field campaigns in 2016, in order to characterize and quantify SPM in the water column, near the mouth of the Seine estuary...
Tipo: Text Palavras-chave: Matière en suspension (MES); Floculation; Matière organique; Distribution en classe de taille; Dimension fractale; Capteurs optiques et acoustiques; Baie de Seine; Suspended particulate matter (SPM); Flocculation; Organic matter; Particle size distribution; Fractal dimension; Optical and acoustic sensors; Seine Bay.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00500/61155/64591.pdf
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