Two typical study areas (Chezigou fishing village subjected to serious erosion process and Huanghe Haigang remaining in the balanced state between erosion and siltation) were selected to conduct a series of experiments including wave-loading simulations

flume erosion tests and geotechnical tests aiming at studying the erosional characteristic evolution of fine sediment in the process of wave loading actions and exploring the evolutional mechanism. It is demonstrated that the sediment erodibility at Chezigou fishing village study area is widely higher than that at Huanghe Haigang both in the absence of wave action and weak wave conditions; however

with a more evident downward trend under wave loading due to the more significant liquefaction characteristics of fine soils in Chezigou fishing village

which can contribute to the serious coastal erosion this study area subjects to. Additionally

basing on the analysis of the sedimentation data and particle composition of the fine sediments in the two study areas

the reworking of wave loading to transport fine particles of the bottom sediment upward accelerates the coarsening process of seabed sediment

which promotes the evolution of sediment erodibility of fine soils in coastal areas.