Using video imagery to reconstruct the 3D intertidal terrain along a beach with multiple cusps  

作　　者：Feng Cai Hang Yin Hongshuai Qi Jixiang Zheng Yuwu Jiang Zhubin Cao Yanyu He 

机构地区：[1]Laboratory of Ocean and Coast Geology,Third Institute of Oceanography,Ministry of Natural Resources,Xiamen 361005,China [2]College of Ocean and Earth Sciences,Xiamen University,Xiamen 361104,China [3]College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China

出　　处：《Acta Oceanologica Sinica》2023年第7期1-9,共9页海洋学报（英文版）

基　　金：The National Key Research and Development Program of China under contract No.2022YFC3106100;the Key Program of National Natural Science Foundation of China under contract No.41930538.

摘　　要：A high-frequency,high-resolution shore-based video monitoring system(VMS)was installed on a macrotidal(tidal amplitude>4 m)beach with multiple cusps along the Quanzhou coast,China.Herein,we propose a video imagery-based method that is coupled with waterline and water level observations to reconstruct the terrain of the intertidal zone over one tidal cycle.Furthermore,the beach cusp system(BCS)was precisely processed and embedded into the digital elevation model(DEM)to more effectively express the microrelief and detailed characteristics of the intertidal zone.During a field experiment conducted in January 2022,the reconstructed DEM was deemed satisfactory.The DEM was verified by RTK-GPS and had an average vertical root mean square error along corresponding RTK-GPS-derived intertidal profiles and corresponding BCS points of 0.134 m and 0.065 m,respectively.The results suggest that VMSs are an effective tool for investigating coastal geomorphic processes.

关 键 词：intertidal terrain beach cusp video monitoring system waterline method feature embedment 

分 类 号：P715.7[天文地球—海洋科学]