FN Archimer Export Format PT C TI Boundary layer development and shear stresses measurements around an oyster table BT AF KERVELLA, Youen GERMAIN, Gregory GAURIER, Benoit FACQ, Jean-Valery CAYOCCA, Florence LESUEUR, Patrick AS 1:1,2;2:1;3:1;4:1;5:1;6:2; FF 1:PDG-DOP-DCB-DYNECO-PHYSED;2:PDG-DOP-DCB-RDT-HO;3:PDG-DOP-DCB-RDT-HO;4:PDG-DOP-DCB-RDT-HO;5:PDG-DOP-DCB-DYNECO-PHYSED;6:; C1 IFREMER Université de Caen-Basse Normandie, CNRS/INSU C2 IFREMER, FRANCE UNIV CAEN, FRANCE SI BREST BOULOGNE SE PDG-DOP-DCB-DYNECO-PHYSED PDG-DOP-DCB-RDT-HO UR https://archimer.ifremer.fr/doc/00022/13359/10388.pdf LA English DT Proceedings paper AB Oyster tables are artificial obstacles which are laid over muddy or sandy-muddy floors in intertidal areas. This study aims to show the current modifications related to the presence of the oyster table thanks to LDV measurement in a flume tank. Boundary layer development in different geometric configuration is underlined and suggests some important areas of velocity decrease and sediment transport modification. Shear stresses are also calculated near the bottom and around the table. The total shear stress in the water column exhibits an important increase when the flow passes through the oyster table, hence a flow energy decrease through dissipation. This study helps to understand the reasons for the increased sedimentation observed in some natural sites. PY 2009 ID 13359 ER EF