FN Archimer Export Format PT C TI Characterization of infragravity waves and their associated hydrodynamics processes in meso-macro tidal lagoon BT AF BAYLE, Paul NICOLAE LERMA, Alexandre BERTIN, Xavier SENECHAL, Nadia GANTHY, Florian AS 1:1,2;2:1;3:3;4:4;5:2; FF 1:;2:;3:;4:;5:PDG-ODE-LITTORAL-LERAR; C1 Brgm, Regional Direction Nouvelle-Aquitaine, F-33600 Pessac, France IFREMER, LITTORAL, F-33120, Arcachon, France CNRS, UMR 7266 LIENSs, F17100, La Rochelle, France Univ Bordeaux, UMR 5805 EPOC, F-33615 Pessac, France C2 BRGM, FRANCE IFREMER, FRANCE CNRS, FRANCE UNIV BORDEAUX, FRANCE SI ARCACHON SE PDG-ODE-LITTORAL-LERAR UR https://archimer.ifremer.fr/doc/00870/98167/107502.pdf LA English DT Proceedings paper AB Infragravity (hereafter ‘IG’) waves are ocean waves related to the presence of groups in incident shortwaves. The importance of IG waves in the nearshore and their role in beach morphodynamics have been widely documented over the last few decades (Bertin et al., 2018) while in contrast, studies on characterisation of IG waves and related impacts in tidal inlets are scarce and have only recently begun to be addressed (Williams and Stacey, 2016). Nonetheless, existing studies tend to show that IG waves in tidal inlets can play an important role in the short and long-term hydro-morphodynamics of coastal lagoons. The current study presents the first large scale field measurements and analysis of IG waves propagation and characteristics in a meso-macro tidal lagoon/inlet. PY 2023 PD SEP CT Coastal Engineering 2022. Proceedings of 37th Conference on Coastal Engineering, 4 – 9 December 2022 Sydney, Australia. Daniel Cox (Ed.) ISBN: 978-0-9896611-6-4. 3p. DI 10.9753/icce.v37.management.159 ID 98167 ER EF