沉积学报2026，Vol.44Issue(3)：961-976,16.DOI:10.14027/j.issn.1000-0550.2024.129
渤海海峡限制性地形对现代沉积体系分布的控制
Control of Restrictive Topography in the Bohai Strait on Modern Sedimentary System Distribution
摘要
Abstract
[Objective]The formation of sedimentary systems within straits is intricately linked to the unique topo-graphical constraints that influence both facies characteristics and sediment distribution patterns.Although current re-search mainly focuses on narrow straits(less than 50 km wide),where sedimentation is dominated by tidal process-es,wider straits introduce more complex hydrodynamic dynamics,leaving many aspects of the sedimentation process-es yet to be fully understood.[Methods]This study focuses on the Bohai Strait(a shallow strait with a width of 106 km)and is based on an extensive dataset of surface sediment grain sizes,combined with four shallow seismic pro-files,to characterize the sedimentary environment within the Bohai Strait.Additionally,a regional ocean modeling system(ROMS)simulation was employed for winter(December 2020-February 2021)to better understand the hydro-dynamic processes influencing sediment dynamics and control over sediment distribution within and surrounding the Bohai Strait.[Results]Our results reveal significant differences in sediment dynamics between the northern and southern parts of the strait.The northern region exhibits a high-energy environment dominated by erosion,whereas the southern region displays a lower-energy environment conducive to deposition.Surface sediment types vary spatial-ly,with coarser grains predominating in the north and narrow regions,with finer grains observed on both sides(east-west)and in the south.A large-scale,sandy flood-tidal delta appears around the Laotieshan Channel in the north.The asymmetric tidal currents flowing in and out of the channel are likely responsible for this feature,and ebb-tidal delta is not prominent.In contrast,the southern part of the strait exhibits two distinct sedimentary systems:(1)Shan-dong mud wedge:This system lies along the coast of the Shandong Peninsula,shaped by the substantial sediment supply from the Yellow River and the influence of coastal currents.(2)Scour troughs and sandy tidal deltas:These smaller features are attributed to the protective effect of islands present in the southern strait,combined with the abundant supply of fine-grained sediments.[Conclusions]This study highlights the critical role of the complex topog-raphy of the strait in the confinement in shaping regional sediment transport dynamics and the resulting distribution of sedimentary systems.关键词
潮流沉积/海峡沉积/沉积动力模拟/区域海洋动力模型/渤海海峡Key words
tidal deposition/strait deposition/sedimentary dynamics simulation/regional ocean modeling system/Bohai Strait分类
天文与地球科学引用本文复制引用
黄于婷,单新,石学法,乔淑卿,徐笑梅,潘海东,蓝涛,高建华..渤海海峡限制性地形对现代沉积体系分布的控制[J].沉积学报,2026,44(3):961-976,16.基金项目
国家自然科学基金项目(42472164) （42472164）
"中央级公益性科研院所基本科研业务费专项资金"资助项目(2024S01) National Natural Science Foundation of China,No.42472164 （2024S01）
Basic Scientific Fund for National Public Research Institutes of China,No.2024S01 （）
