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Caractérisation et dynamique des turbidités en zone côtière : L'exemple de la région marine Bretagne Sud 5
Tessier, Caroline.
The space and time turbidity variability in Southern Brittany was studied, from the combination of results of hydrological campaigns, long-term instrumented moorings, satellite observations and 3D process-based numerical modelling. Previous observations exhibit a cross-shore concentration gradient with values hardly exceeding 30 mg/l beyond the littoral zone. Acoustic profilers (ADCP) were moored to measure currents, waves and the associated dynamics of fine particles. Time series of mass concentration in the whole water column were estimated from the analysis of the backscattered signal. During wave episodes, values can reach 100 mg/l at 1.50 m above bottom, just outside the Bay of Vilaine. The empirical calibration of the signal with independent...
Tipo: Text Palavras-chave: Southern Brittany; MARS 3D numerical model; Acoustic backscattering; Acoustic current profiler; Waves; Circulations; Turbidity; Bretagne Sud; Modèle numérique MARS 3D; Rétrodiffusion acoustique; Profileur acoustique de courant; Vagues; Circulations; Turbidité.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-2325.pdf
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