College of Marine Geosciences;
Ocean University of China;
Qingdao 266100;
China;
Island Research Center;
Ministry of Natural Resources;
Pingtan 350400;
China;
Key Laboratory of Submarine Science and Exploration Technology;
Education Ministry of China;
Qingdao 266100;
China;
Shandong Marine Resources and Environment Institute;
Shandong Provincial Key Laboratory of Restoration for Marine Ecology;
Yantai 264006;
China;
static headland-bay beach concept; elliptical model; sandy beach; coastal erosion; east coast of Laizhou Bay;