| 长江河口九段沙近期冲淤演变过程研究 |
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| 引用本文： | 陈炜,李九发,蒋陈娟,李占海,姚弘毅,徐敏.长江河口九段沙近期冲淤演变过程研究[J].泥沙研究,2011(1). |
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| 作者姓名： | 陈炜 李九发 蒋陈娟 李占海 姚弘毅 徐敏 |
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| 作者单位： | 华东师范大学河口海岸学国家重点实验室,上海,200062 |
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| 基金项目： | 国家自然科学基金项目(40976055;50939003) |
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| 摘 要： | 1998年以前,九段沙是一个人类活动干预很小的天然河口江心沙洲。北槽深水航道治理工程建设,使九段沙头部和北边界基本固定,南北槽分流分沙比改变,水沙交换减少。同时,随着流域来沙和河口河道底沙来源减少,近期九段沙冲淤演变发生新的变化。如今的九段沙0m水深线包络体在不断地淤高扩宽。上沙沙头迅速淤涨,并越过南导堤向北偏伸入北槽,沙尾则快速向南槽延伸,并与南导堤和中沙之间形成新的涨潮沟通道;九段沙南北侧由于冲淤不均其水边线形态出现明显不规则变化,下沙尾部东南端冲蚀,东北端淤涨,沙洲长轴线逆时针转动,但洲体整体位置摆动极小。作为国家级自然保护区,其上沙沙尾的快速延伸和沙洲南侧局部冲淤不平衡须引起重视,确保九段沙沙洲整体稳定。
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| 关 键 词： | 长江河口 九段沙 深水航道工程 鱼嘴工程 冲淤演变 |
Characteristics of recent morphological evolution of Jiuduansha Shoal in Yangtze Estuary |
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| CHEN Wei,LI Jiu-fa,JIANG Chen-juan,LI Zhan-hai,YAO Hong-yi,XU Min.Characteristics of recent morphological evolution of Jiuduansha Shoal in Yangtze Estuary[J].Journal of Sediment Research,2011(1). |
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| Authors: | CHEN Wei LI Jiu-fa JIANG Chen-juan LI Zhan-hai YAO Hong-yi XU Min |
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| Affiliation: | CHEN Wei,LI Jiu-fa,JIANG Chen-juan,LI Zhan-hai,YAO Hong-yi,XU Min(State Key Laboratory of Estuarine & Coastal Research,East China Normal University,Shanghai,200062,China) |
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| Abstract: | The Jiuduansha Shoal in the Yangtze Estuary is a natural estuarine shoal with insignificant human interventions before 1998.With the construction of the Deep-water Navigation Channel Project in the North Passage,the head and the northern boundary of the Jiuduansha Shoal were fixed,the distribution of the flow and sediment between the North Passage and the South Passage has been changed,and the exchange of flow and sediment between them has been decreased,simultaneously.Along with the decrease of sediment lo... |
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| Keywords: | Yangtze Estuary Jiuduansha shoal Deep-water Navigation Channel Project distributary jetty evolution of erosion and accumulation |
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