海洋地质前沿2025，Vol.41Issue(2)：92-104,13.DOI:10.16028/j.1009-2722.2024.039
曹妃甸南部海域表层沉积物侵蚀特征
Study on erosion characteristics of surface sediments in southern Caofeidian
摘要
Abstract
The offshore area is a sensitive area of land-sea interaction.Due to the combined influence of natural and human activities,the sedimentary dynamic environment is more complex.The seabed surface is the key inter-face for the interaction between water and seabed,and the erosion characteristics of surface sediments are import-ant factors affecting the evolution of seabed erosion and deposition.Based on the surface sediment samples of 91 stations and 10 undisturbed intubation samples in the southern sea area of Caofeidian in October 2021,the spatial distribution characteristics of critical erosion shear stress and erosion rate of surface sediments in the study area were analyzed by particle size experiment and indoor U-GEMS micro-erosion experiment.Combined with the nu-merical simulation results of tidal current,the erosion characteristics of surface sediments in the study area under the action of tidal current were discussed.The results show that the critical erosion shear stress of surface sedi-ments in the area around the Caofeidian head is larger,and the critical erosion shear stress in the southern part of the study area is relatively small.The critical erosion shear stress of surface sediments is between 0.3 and 0.6 N/m2.The erosion rate increases linearly with the increase of shear stress,and the maximum erosion rate is 0.059 g·m-2·s-1.The erosion characteristics of surface sediments in the study area are affected by tidal current and the erodibility of surface sediments.The research results are helpful to enrich the theoretical research results of offshore erosion and deposition evolution from the aspects of sediment erosion characteristics,and have certain guiding significance for offshore engineering construction and coastal protection.关键词
表层沉积物/可侵蚀性/微观侵蚀实验/数值模拟/曹妃甸Key words
surface sediments/erosion characteristics/micro-erosion experiment/numerical simulation/Cao-feidian分类
海洋科学引用本文复制引用
佀同浩,褚宏宪,孙菲菲,白大鹏,朱龙海,胡日军,林超然..曹妃甸南部海域表层沉积物侵蚀特征[J].海洋地质前沿,2025,41(2):92-104,13.基金项目
中国地质调查局项目"渤海曹妃甸海域1:5万海洋区域地质调查"(DD20211553),国家自然科学基金(42276172) （DD20211553）
