华东地质2025，Vol.46Issue(4)：440-456,17.DOI:10.16788/j.hddz.32-1865/P.2025.11.001
中国华东地区潮滩侵蚀-淤积现状及机理研究
Erosion-accretion patterns and driving mechanism of tidal flats along the East China coast
摘要
Abstract
Tidal flats,serving as critical interfaces of land-sea interactions,play vital roles in coastal protec-tion and biodiversity conservation.Extensive tidal flats have developed along the coast of East China.However,in recent years,significant alterations in their erosion-accretion patterns and considerable challenges to their sys-temic stability have emerged,driven by multiple factors including a drastic reduction in riverine sediment supply,the expansion of reclamation projects,sea-level rise,and the increased frequency of extreme events.This paper systematically reviews the current status of tidal flat erosion and accretion along the East China coast,aiming to elucidate the evolutionary trends of different tidal flat types under the interplay of natural factors and human activ-ities.The findings reveal that the erosion-accretion response of tidal flats along the East China coast demonstrates significant spatial heterogeneity,governed by regional hydrodynamic-sediment-morphodynamic processes and human interventions.Three distinct response patterns are identified:①Along Jiangsu's open coast,erosion has progressively intensified and erosional hotspots have migrated southward under combined conditions of sediment supply reduction and enhanced hydrodynamics;②In the Yangtze Estuary-Hangzhou Bay estuarine system,sig-nificantly influenced by the dramatic decline in Yangtze-derived sediment,tidal flats have transitioned from accre-tion to partial erosion,with erosion intensity generally decreasing in a landward direction;③The Zhejiang-Fu-jian embayment tidal flats have maintained net accretion with a southward-decreasing intensity,though their re-cent accretion rates have diminished due to the reduced sediment flux from the Yangtze River and ongoing inten-sive reclamation activities.The insights from this study can provide a scientific basis for the protection and eco-logical restoration of tidal flats along the East China coast.关键词
潮滩/侵蚀-淤积/自然因素/人类活动/华东海岸Key words
tidal flat/erosion-accretion/natural factors/human activities/East China coast分类
天文与地球科学引用本文复制引用
WANG Aijun,YE Xiang,ZHANG Xiaofei,LIN Zhenkun,TAO Shuqin..中国华东地区潮滩侵蚀-淤积现状及机理研究[J].华东地质,2025,46(4):440-456,17.基金项目
福建省自然科学基金"互花米草清除对河口潮滩湿地冲淤和有机碳'源-汇'格局的影响研究(编号:2025J02029)"和自然资源部滨海盐沼湿地生态与资源重点实验室开放基金"海岸侵蚀背景下的江苏中部潮滩沉积有机碳的'源-汇'过程研究(编号:KLCSMERMNR202309)"项目联合资助. （编号:2025J02029）
