Infragravity (IG) waves are low-frequency waves (0.0033 Hz < f < 0.05 Hz) that become important or even dominant compared to the sea-swell waves at the toe of a dike on a very or extremely shallow foreshore, therefore becoming important to the wave overtopping process. This paper presents the field setup for observations of IG waves offshore and nearshore at Living Lab Raversijde (LLR) with the Research Dike Raversijde (RDR) (presented by Gruwez et al. (2024), also at Coastlab24) for measuring the wave-structure interactions (overtopping, impact,…), and presents the results of IG wave influence on wave overtopping, including free IG waves (never done before). Finally, a first evaluation of existing empirical formulas with the field measurements is done. At the conference, the field setup and results will be presented in more detail, based on storms measured during winters '22-'23 and '23-'24.
