| 摘要: |
| 鳗鱼沙浅滩位于长江下游口岸直水道,属顺直宽浅水下分汊型沙质浅滩,是长江下游深水航道主要的碍航浅滩之一.根据河道实测水文、地形资料,分析浅滩段近期河床演变特征,并结合深水航道的建设规划,分析了浅滩碍航特性及其成因.分析研究认为:顺直宽浅的河道属性使鳗鱼沙心滩和左、右深槽不稳定,河床发生大幅度冲淤变化;顺直段滩槽的大幅度冲淤变化是鳗鱼沙浅滩形成的主要原因,而河床边界条件引起的水流运动特征是浅滩形成的重要影响因素. |
| 关键词: 长江下游 口岸直水道 鳗鱼沙浅滩 碍航特性 |
| DOI： |
| 分类号:TV148 |
| 基金项目: |
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| Cause analysis of Manyusha shoal in Kouan straight reach of the Yangtze River |
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CHEN Zhang-ying,ZHANG Xing-nong,ZHAO Kai
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CHEN Zhang-ying,ZHANG Xing-nong,ZHAO Kai(Nanjing Hydraulic Research Institute,Nanjing 210029,China)
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| Abstract: |
| Manyusha shoal,located in the Kouan straight reach,is a main navigation obstacle in the lower reaches of the Yangtze River.Based on the observed hydrologic and topographic data and the deep-draft channel regulation planning,the evolution character of Manyusha shoal in the recent period,the navigation obstacle character and the cause are analyzed in the paper.We conclude that Manyusha shoal and the left and right deep pools produce much scouring-silting change,which is the main cause of the formation of the ... |
| Key words: the lower reaches of the Yangtze River Kouan straight reach Manyusha shoal navigation obstacle character |
