Sediment transport induced by tidal bores. An estimation from suspended matter measurements in the Sée River (Mont-Saint-Michel Bay, northwestern France)

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• 作者：Lucille Furgerot^a ; ^b ; ^{lucille.furgerot@univ-lr.fr" class="auth_mail" title="E-mail the corresponding author} ; Dominique Mouazé ; ^a ; Bernadette Tessier^a ; Laurent Perez^a ; Sylvain Haquin^a ; Pierre Weill^a ; Alain Crave^c
• 关键词：Tidal bore ; Flow velocity ; Suspended sediment concentration (SSC) ; Laboratory calibration ; Direct sampling ; ASM rod ; Sediment flux ; Mont-Saint-Michel Bay
• 刊名：Comptes Rendus Geoscience
• 出版年：2016
• 出版时间：July-August 2016
• 年：2016
• 卷：348
• 期：6
• 页码：432-441
• 全文大小：2533 K

文摘

Tidal bores are believed to induce significant sediment transport in macrotidal estuaries. However, due to high turbulence and very large suspended sediment concentration (SSC), the measurement of sediment transport induced by a tidal bore is actually a technical challenge. Consequently, very few quantitative data have been published so far. This paper presents SSC measurements performed in the Sée River estuary (Mont-Saint-Michel Bay, northwestern France) during the tidal bore passage with direct and indirect (optical) methods. Both methods are calibrated in laboratory in order to verify the consistency of measurements, to calculate the uncertainties, and to correct the raw data. The SSC measurements coupled with ADCP velocity data are used to calculate the instantaneous sediment transport (q_s) associated with the tidal bore passage (up to 40 kg/m²/s).