| 长江口深水航道一、二期工程建设以来北槽河段的冲淤演变 |
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| 引用本文： | 王兆华,杜景龙.长江口深水航道一、二期工程建设以来北槽河段的冲淤演变[J].海洋通报,2006,25(6):55-62,84. |
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| 作者姓名： | 王兆华 杜景龙 |
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| 作者单位： | 1. 苏州科技学院城市与环境学系,江苏,苏州,215011
2. 苏州科技学院城市与环境学系,江苏,苏州,215011;华东师范大学河口海岸国家重点实验室,上海,200062 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);华东师范大学校科研和教改项目 |
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| 摘 要： | 利用长江口深水航道治理一、二期工程实施前后的水下地形资料,在GIS软件及相关的统计分析软件的支持下,分析了治理工程对北槽拦门沙河段的影响。结果表明:整治工程使得河道平均水深增加,河床上下平顺相接,河床横断面形态趋于均匀,河势趋于稳定。至2005年初,北槽河道上段水深比工程前的1998年初平均增加了1.34m,中段则淤浅0.63m,下段刷深0.81m,河床纵向上变得和缓、平顺;丁坝段的冲刷南侧的强度较北侧大,中下段河槽北偏,深泓从原来的东南-西北走向改呈东西向,全槽形成了一条上下段平顺相接的微弯自然深泓线,河槽的形态也从工程前的宽缓或陡峭形变为均匀的“V”字形;下游河段没有产生新的航道拦门沙。
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| 关 键 词： | 长江口 北槽航道 治理工程 拦门沙 |
| 文章编号： | 1001-6392（2006）06-0055-08 |
| 收稿时间： | 2005-09-14 |
| 修稿时间： | 2005-09-142005-12-14 |
Evolvement of the North Passage After Executing the Deep-Water Channel Project of Yangtze Estuary |
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| WANG Zhaohua,DU Jinglong.Evolvement of the North Passage After Executing the Deep-Water Channel Project of Yangtze Estuary[J].Marine Science Bulletin,2006,25(6):55-62,84. |
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| Authors: | WANG Zhaohua DU Jinglong |
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| Abstract: | Based on the topographic maps drawn during the last decade and supported by the GIS software and correlative Stat. Software, this paper described the influence of the regulation project on the north passage bar. The results show that the regulation project has increased the depth of north channel, which makes the riverbed flat and slow. The circumstances of the north passage levels off. From the beginning of 1998 to 2005, the depth of the upper reaches of North Passage had increased 1.34m,the middle and lower reaches increased 0.63m and 0.81m , which made the riverbed flat and slow. More consuming erosion happened on the southside of the upper reaches and the leaning to the north of the middle and lower reaches made the deep trough stretch west to east (the former is south-east to north-west). The riverbed has become V shape from broad-and- flat shape or abrupt shape. New bar was not found at the lower reaches of North Passage. |
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| Keywords: | Yangtze Estuary North Passage regulation engineering bar |
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