Sediment grain size features versus shoreline changes in view of field investigations

The paper presents the results of analyses of relationships between variability of shoreline position, grain size distributions of sediments and the wave climate at the IBW PAN Coastal Research Station in Lubiatowo. The study reports the 2 year long field investigations, which have comprised registrations of shoreline evolution, grain size parameters of nearshore sea bed and wave motion in the nearshore zone. The analysis of the experimental data provides a realistic assessment of morphodynamic processes occurring and interacting in the investigated coastal region. In the study, the following sand characteristic parameters have been considered: the median diameter d50, the representative diameters d25 and d75, the sorting parameter S0 and the skewness parameter Sk. The values of these parameters are found to correlate with the features of the coastal forms, mainly the shoreline migration.