Morphological Response of Coastal Sand Sheets to Typhoons

作者：Lin Yang, Yuxiang Dong, Dequan Huang · 发表于：DOAJ (DOAJ: Directory of Open Access Journals) · 年份：2021 · DOI：10.13284/j.cnki.rddl.003376 · 被引用次数：1 · 研究领域：Coastal and Marine Dynamics

Typhoons, as essential influential factors for the formation and evolution of coastal dunes, are one of the most important aspects of surf zone-beach-dune interaction research. Pingtan Island is located on the eastern coast of Fujian Province, China, and preserves a typical type of coastal dunes on China's coastline. These dunes are well-known for their typical shape, volume, and limited human disturbance. Pingtan Island suffers frequent, unavoidable damage from typhoons, and was therefore selected as the study site for this research. Field investigations were conducted on the island before and after typhoon events, by using high-precision RTK GPS technology and surveying methods. The field site was visited 16 times between 2014 and 2017. We analyzed the morphological responses of coastal sand sheets to typhoons, and the related morphological changes. Finally, we summarized the morphological response patterns of coastal sand sheets to typhoons. This study is of great importance for comprehensively understanding the morphological evolution of coastal dunes, which is fundamental for effective coastal planning and management. The following results were obtained: (1) The typhoon imposed significant morphological changes on coastal sand sheets, which can be summarized as a decrease in the height of the beach and frontal coastal sand sheets (maximum erosional depth of 0.92 m), minor variations in the height of coastal sand sheets at middle sites (≤ 0.15 m), and a slight increase in...