海洋地质前沿2025，Vol.41Issue(2)：68-77,10.DOI:10.16028/j.1009-2722.2023.103
现代黄河水下三角洲对尾闾改道事件的沉积响应
Sedimentary response of the modern subaqueous Yellow River Delta to channel migrations in the 1855,1976,and 1996 diversion events
摘要
Abstract
The migration of deltaic river channels is a major factor affecting the sedimentary evolution pattern of the delta.Due to its large sediment supply and frequent channel migrations,the Yellow River Delta was regarded as an ideal area to address this issue.In this study,we systematically collected the age and particle size data from 22 sediment cores to explore the impacts of the three Yellow River channel migration events on the sedimentary evolution of the Yellow River subaqueous delta and spatial differences in the delta's response to the same migra-tion event.In 1855,the northward inflow of the Yellow River into the Bohai Bay caused changes in the sediment-ary sources and sedimentary dynamics,resulting in refined sediment particle size and a shift in particle size fre-quency distribution curve.In 1976,the Yellow River was diverted from the Diaokou course to the Qingshuigou course,causing the particle size of abandoned Diaokou subaqueous delta to coarsen with increased sand content and decreased sedimentation rate.Interruption of the terrestrial supply increased the influence of marine organic matter on organic carbon burial.However,the direct supply of fine sediment from the Yellow River caused the fining of particle size seen in sediment cores in the Laizhou Bay and the active river mouth area.Since 1996,the Yellow River has been diverted to the Q8 course,causing a continuously coarsening trend in particle size in the Diaokou area;the main source of sediment in the Laizhou Bay area had changed to eroded coastal materials with coarsening particles;and the active subaqueous delta received the material supply from the Yellow River sedi-ment,but the dynamic sorting during transportation caused a trend of particle coarsening in the shallow area.关键词
河流改道/黄河水下三角洲/三角洲演化/沉积特征Key words
channel migration/Yellow River subaqueous delta/delta evolution/sedimentary characteristics分类
海洋科学引用本文复制引用
孔淼淼,刘夙睿,王厚杰,毕乃双,胡利民,闫天浩,任晰熙,刘彦昊,吴晓..现代黄河水下三角洲对尾闾改道事件的沉积响应[J].海洋地质前沿,2025,41(2):68-77,10.基金项目
资助项目:国家自然科学基金面上项目(42176168) （42176168）
国家自然科学基金国际合作与交流项目(42411540024) （42411540024）
山东省杰出青年基金项目(ZR2024JQ016) （ZR2024JQ016）
山东省泰山学者项目(TSQN202211054) （TSQN202211054）
山东省高等学校青创科技支持计划(2022KJ045) （2022KJ045）
