Field measurements of hydrodynamics and sediment transport at intertidal areas in the Dutch Wadden Sea

Abstract. Two field measurement campaigns were carried out in the Dutch Wadden Sea in winter 2023–24 and in early spring 2025. The campaigns were designed to understand and quantify sediment transport and exchange between morphological units at two spatial scales: on larger scale between two adjacent tidal basins and on smaller scale between individual channels and shoals. These observations support ongoing research to better understand sediment dynamics in the Wadden Sea, and thereby to improve sediment management strategies essential for maintaining coastal functions in the Dutch coastal system over short (days–months) to long (decades) timescales. The resulting dataset contains point measurements at five locations in the first campaign and eight locations in the second campaign, including (1) near-bed flow velocities and velocity profiles, (2) wave characteristics, (3) suspended sediment concentrations and transport rates, and (4) local bed level dynamics, as well as data on the sediment composition of (intertidal) seabed samples. Measurements were collected simultaneously for a period of six to eight weeks in both campaigns, although some instruments collected data for only four weeks in the Winter 2023–24 campaign. This article documents the field observations and data processing, and highlights potential applications. This dataset may contribute to a better understanding of sediment dynamics in the Dutch Wadden Sea, but also advance our understanding of channel-shoal sediment exchange mechanisms in general. It provides the field data for investigating fundamental processes controlling sediment dynamics in tidal systems, such as tide- and wind-driven flows and transport, shallow water wave dynamics, wave and current-induced resuspension, and sediment bed stability. The data are publicly available in three versions (raw, filtered and tailored datasets) at 4TU Centre for Research Data at https://doi.org/10.4121/bbb85feb-15f9-476f-9598-b6509392117d (van Weerdenburg et al., 2026).