文献类型：期刊文献

英文题名：Bed level changes in the surf zone during post-storm beach recovery

作者：Hu, Pengpeng[1];Li, Zhiqiang[1];Zeng, Chunhua[2];Zhu, Daoheng[1];Liu, Run[3];Su, Qianxin[1];Tang, Jieping[1];Zhu, Yamin[4]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean Engn, Zhanjiang, Peoples R China;[3]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang, Peoples R China;[4]State Ocean Adm China, State Ocean Marine Environm Monitor Ctr Zhuhai, Zhuhai, Peoples R China

年份：2023

卷号：10

外文期刊名：FRONTIERS IN MARINE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:001059206600001)、、Scopus(收录号：2-s2.0-85169907547)、WOS

基金：Thanks are given to the satellite image data support from USGS and Google Earth. Thanks are also due to the ECMWF for providing the significant wave height and wave direction in deep water. The authors would like to thank all members of our team for their contributions in field observation, as well as the managers of Dongdao Beach for their assistance during the field observations.r This work was supported by the National Natural Science Foundation of China under Grant 42176167 and the Project of Enhancing School With Innovation of Guangdong Ocean University under Grant 18307.

语种：英文

外文关键词：bed level changes; storms; beach restoration; surf zones; field observations

外文摘要：The study of post-storm beach recovery is important for economic development and the protection of life in coastal areas. In this study, field observations were conducted for 21 days in the surf zone of Dongdao Beach, Hailing Island, China, after tropical storm "Cempaka". Data on depth, wave, Eulerian velocity, sediment, three-dimensional topography of the beach, and high-frequency variations in bed-level elevation were collected. The results showed that the beach experienced medium- to low- to medium-energy waves during field observations and covered two complete astronomical tide cycles. Contrary to the effect of wave energy conditions on beaches under normal wave conditions, a higher wave energy during beach recovery can promote silting and accelerate beach recovery. Tidal water level is an important factor affecting beach restoration, and a smaller tidal range is conducive to beach accretion. In a mixed semidiurnal tide, beach erosion and accretion occurred in the "highest tide" and "sub-highest tide" tidal cycles, respectively, and the combined effect of the two affected the change in the bed level in a mixed semidiurnal tide. After the storm, the hydrodynamic forcing mechanism and self-organization process of the sand bar jointly drove the formation of the topography of the bar channel in the surf zone. After the storm stopped, the spectral energy in free surface elevation was mainly distributed in the very low frequency and decayed rapidly at the infragravity band. The very low-frequency pulsation of the surf zone during recovery is a prominent feature of bed-level elevation, depth, and velocity. This study provides a good case for the study of hydrodynamic and bed level changes in the post-storm surf zone, as well as a reference for future studies of the intrinsic mechanisms post-storm beach recovery processes around the world.