This data set was prepared to verify the core relation between intertidal morphodynamics and BSS distribution as descripted by the Dynamic Equilibrium Theory (DET). Hydrodynamic and bed-level change data were monitored daily for one year on two tidal flats with contrasting wave exposures. Notably, the bed-level change data were provided by SED-sensors (surface elevation dynamic sensors). The data sets presented here includes the bed-level data, wave data, water depths and current velocity.