| 长江河口底沙运动规律 |
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| 引用本文： | 李九发,沈焕庭,徐海根.长江河口底沙运动规律[J].海洋与湖沼,1995,26(2):138-145. |
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| 作者姓名： | 李九发 沈焕庭 徐海根 |
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| 作者单位： | 华东师范大学河口海岸研究所!上海，200062，华东师范大学河口海岸研究所!上海，200062，华东师范大学河口海岸研究所!上海，200062 |
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| 摘 要： | 于１９８１－１９８８年以浅地层剖面仪和回声测探仪取得沙波观测资料，运用这些资料以及河床表层沉积物和历年河口水文、地形资料，采用水文学、沉积学与泥水沙运动力学相结合的研究方法，分析长江河口底沙的运规律。结果表明：长江河口底沙运动非常频敏，一般有单颗粒滚动、跳跃，沙波及沙体推移等形式；在沙质床面上沙波发育良好，其形成、发展和消失和潮差落潮流速有一定的相关性，因受涨，落潮流改造，沙波难于得到充分发展；沙
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| 关 键 词： | 长江河口 底沙输移 沙波 沉积物 运动规律 |
| 收稿时间： | 1991/10/29 0:00:00 |
| 修稿时间： | 5/3/1994 12:00:00 AM |
THE BEDLOAD MOVEMENT IN THE CHANGJIANG RIVER ESTUARY |
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| Li Jiuf,Shen Huanting and Xu Haigen.THE BEDLOAD MOVEMENT IN THE CHANGJIANG RIVER ESTUARY[J].Oceanologia Et Limnologia Sinica,1995,26(2):138-145. |
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| Authors: | Li Jiuf Shen Huanting and Xu Haigen |
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| Institution: | Institute of Estuarine & Coastal Research, East China Normal University, Shanghai 200062;Institute of Estuarine & Coastal Research, East China Normal University, Shanghai 200062;Institute of Estuarine & Coastal Research, East China Normal University, Shanghai 200062 |
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| Abstract: | Sandwaves in the Changjiang River Estuary were measured in 1981-1988 with a shallow sediment profiler and an echosounder. Study based on the data and the grain size and bedform of surface sediment, and data over .the years on hydrology and topography indicate that the bedload movement by rolling and saltation is of great significance to sediment transport and is the principal factor responsible for sandwave and sandbody development in the estuary. The sandwaves were found well-developed, which is related to the tidal range and the velocity of ebb current.However, their further growth is restricted by strong flood current prevailing in the estuary. The significant bedload and the obvious and frequent shifting of the sand bodies sometimes cause the positions of the mavigational channels to change. As a result, ships are regularly forced to change their navigation course. |
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| Keywords: | Changjiang River Estuary Bedload movement Sandwave Sediment |
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