EVOLUTIONARY FEATURES OF THE ZHAOYUAN SANDY BEACH

This paper is devoted to the evolutionary features of the sandy beach in Zhaoyuan in order to reveal its controlling factors, using the methods of surficial sampling, satellite imaging, numerical simulation of coastal evolution and calculation of the incipient velocity for sediment movement. The results show that the construction of the complex of Chunyu harbor and artificial island has greatly changed the scouring and silting environment of the study area, and then caused significant changes of the coastal area near the Jie river from erosion to siltation, and the increase in erosion around the Chunyu harbor. Wave is the main force that affects the distribution of surface sediments and sediment movement. The construction of artificial structures is obviously the main reason for the change in coastal scouring and silting regime in the study area. The submerged breakwater has effectively reduced the wave action on the coast and contributed greatly to coastal protection.