Article(id=1263533685740024352, tenantId=1146029695717560320, journalId=1240618002186551303, issueId=1263533678655881533, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1000-4653.2026.02.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1755619200000, receivedDateStr=2025-08-20, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1779179506000, onlineDateStr=2026-05-19, pubDate=1777046400000, pubDateStr=2026-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1779179506000, onlineIssueDateStr=2026-05-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1779179506000, creator=13701087609, updateTime=1779179506000, updator=13701087609, issue=Issue{id=1263533678655881533, tenantId=1146029695717560320, journalId=1240618002186551303, year='2026', volume='49', issue='2', pageStart='1', pageEnd='163', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1779179504312, creator=13701087609, updateTime=1779179563167, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1263533925629047616, tenantId=1146029695717560320, journalId=1240618002186551303, issueId=1263533678655881533, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1263533925629047617, tenantId=1146029695717560320, journalId=1240618002186551303, issueId=1263533678655881533, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=51, endPage=60, ext={EN=ArticleExt(id=1263533686872486443, articleId=1263533685740024352, tenantId=1146029695717560320, journalId=1240618002186551303, language=EN, title=Analysis of recent changes in the shoal-channel pattern and their impact on navigation conditions in Tongzhou shoal （2018—2024）, columnId=1240655021705065434, journalTitle=Navigation of China, columnName=Port and Waterway Engineering, runingTitle=null, highlight=null, articleAbstract=

In response to recent adjustments in the fluvial shoal~channel pattern of the Tongzhou Shoal Reach in the lower Yangtze River caused by upstream reservoir operations and natural evolution, which threaten the stability of the 12.5-m deep-draft channel, this study investigates the characteristics of recent river regime evolution and the corresponding channel response mechanisms based on measured hydrological, sediment, and topographic data from 2018 to 2024. Spatiotemporal comparison, cross-section analysis, and erosion-deposition calculation were employed. The shoal-channel adjustments in the reach are pronounced and exhibit systematic spatial differences. The annual swing amplitude of the thalweg in Nantong Waterway reaches 0.4 km, and its navigation-obstructing shoal undergoes a three-stage dynamic evolution of "downstream incision-disconnection-aggregation," characterized by channel erosion and bar deposition, together with seasonal patterns of flood-season deposition and dry-season erosion. In contrast, the Tongzhou Shoal Waterway is mainly characterized by continuous retreat along the right margin of Xinkaisha and the development of chutes, which drive the entire Kuzigangsha to migrate southeastward and squeeze the navigation channel. The study further quantifies the key regulatory role of hydrodynamic forcing. During high-flow years, enhanced hydrodynamics induce approximately 30% reduction in the shoal area in the Nantong Waterway, improving channel conditions, but simultaneously intensify chute development and sandbody migration in the Tongzhou Shoal Waterway. During low-flow years, shoal deposition intrude into the navigation channel, deteriorating channel conditions, while the Tongzhou Shoal Waterway exhibits localized adjustments. These findings provide critical scientific basis for predicting the evolution of deep-draft channels and for optimizing the design of dredging and regulation projects, thereby establishing an important theoretical foundation for the long-term stability and sustainable management of the channel.

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针对上游水库运行叠加自然演变导致长江下游通州沙河段滩槽格局出现新调整、进而威胁12.5 m深水航道稳定的问题，本研究基于2018—2024年实测水沙地形数据，采用时空对比、断面分析与冲淤计算等方法，揭示了近期河势演变特征与航道响应机制。河段滩槽调整剧烈且呈现规律性差异：南通水道深泓年际摆幅达0.4 km，其碍航浅滩历经“切割下移-断开-聚合”三阶段动态演变，整体呈现“槽冲滩淤”与季节性“洪淤枯冲”特征；通州沙水道则以新开沙右缘持续冲退、串沟发育为主要特征，驱动裤子港沙整体向东南迁移并挤压航槽。研究进一步量化了水文动力的关键调控作用，丰水年强动力驱使南通水道浅滩冲刷、面积缩减约30%，航道条件改善，但同时加剧通州沙水道串沟发育与沙体迁移；枯水年则导致浅滩淤积入侵航槽，恶化航道条件，通州沙水道呈现局部调整。研究成果可为深水航道演变预测、疏浚与整治工程优化设计提供关键科学依据，从而为航道的长期稳定与可持续治理奠定重要理论支撑。

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^2．河海大学港口海岸及近海工程学院，江苏 南京 210024, bio={"content":"

李森（1997—），男，助理工程师，研究方向为港口、海岸及近海工程方面研究。

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李森（1997—），男，助理工程师，研究方向为港口、海岸及近海工程方面研究。

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