文献类型：期刊文献

英文题名：High-frequency in situ measurements of beach responses to Tropical Storm Bebinca at Qing'an Bay, Guangdong Province, China

作者：Zeng, Chunhua[1,2];Zhu, Shibing[3];Li, Zhiqiang[3];Chen, Da[1];Zhang, Huiling[2]

机构：[1]Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing 210098, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean Engn, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang 524088, Peoples R China

年份：2020

卷号：36

外文期刊名：REGIONAL STUDIES IN MARINE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000562971000008)、、Scopus(收录号：2-s2.0-85083639431)、WOS

基金：This work was jointly funded by the National Science Foundation of China under contract 41676079 and the Project of Enhancing School with Innovation of Guangdong Ocean University, China under contracts Q18307 and 230419102.

语种：英文

外文关键词：Tropical Storm Bebinca; Qing'an Bay; Beach process; High-frequency measurement

外文摘要：Tropical cyclones are one of the primary driving forces that cause beach evolution in South China. Because of the harsh working conditions, few high-frequency in situ observations of beach responses to tropical storms have been reported. In this study, high-frequency in situ measurements were conducted over six and a half days at Qing'an Bay beach, Xuwen County, Guangdong Province, China, during the strong tropical storm Bebinca in 2018. The measured parameters included overall hydrodynamics, hourly variations of beach surface elevations, and daily sediment sampling. Four main analysis results were identified. (1) Dominated by the spatial distribution of Hainan Island and the Leizhou Peninsula and the long-lasting and changeable characteristics of Bebinca, the hydrodynamic processes of Qing'an Bay were complex, but the variation range was not large. (2) In each tidal cycle, both erosion and accretion occurred in different parts of the beach profile. (3) During Bebinca, there were two main erosion patterns: first vertical and then horizontal. First, the response processes of the spring tidal berm comprised three stages: rapid erosion, slow erosion, and oscillatory recovery. The oscillatory recovery rate during the storm could reach one-quarter of the maximum erosion depth. Thereafter, the storm berm gradually receded laterally after the rapid erosion of the spring tidal berm. A sandbar appeared at the breaking point of the high tide, formed by gradual sand transportation from the beach berm to the sea, and its position was relatively stable. (4) Changes in grain size parameters of beach surface sediments were complex and were significantly influenced by the vertical distribution of grain size components, sediment confluence, and wave sorting. (c) 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).