| 崎岖列岛海区水沙特征及近期冲淤演变 |
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| 引用本文： | 俞航,陈沈良,谷国传.崎岖列岛海区水沙特征及近期冲淤演变[J].海岸工程,2008,27(1):10-20. |
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| 作者姓名： | 俞航 陈沈良 谷国传 |
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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： | 我国近海海洋综合调查与评价专项基金 |
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| 摘 要： | 利用1999年冬季水文泥沙观测资料，分析了崎岖列岛海区冬季水动力条件及悬沙特征；根据1998，2004，2005和2006年水下地形资料，计算了该海区冲淤量及冲淤速率，探讨了研究区域近年来冲淤演变的特征及规律，得出最近8年来海区总体呈冲蚀状态、岛链峡道西部水城和岛闻汉道出现淤积的状况，出现这一状况的原因主要与长江入海泥沙减少和洋山港工程有关。洋山港堵汉工程改变了局部水动力环境，造成岛链峡道西部水域和岛间汊道的冲淤变化；长江入海泥沙减少和长江口、杭州湾大片围垦截沙，削减了对崎岖列岛海区的泥沙补给，导致了海区总体呈冲刷趋势。
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| 关 键 词： | 崎岖列岛 长江口 杭州湾 冲淤演变 水沙特征 |
Water and Sediment Characteristics and Recent Erosional and Depositional Evolution in the Qiqu Archipelago Sea Area |
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| YU Hang,CHEN Shen-liang,GU Guo-chuan.Water and Sediment Characteristics and Recent Erosional and Depositional Evolution in the Qiqu Archipelago Sea Area[J].Coastal Engineering,2008,27(1):10-20. |
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| Authors: | YU Hang CHEN Shen-liang GU Guo-chuan |
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| Institution: | (State Key Lab of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China) |
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| Abstract: | The hydrographic and sedimentary data observed in the winter of 1999 were used to analyze the hydrodynamic conditions and suspended sediment characteristics in the Qiqu Archipelago sea area in winter,the underwater topographic data observed in 1998,2004,2005 and 2006 were used to calculate the erosion and deposition volumes and rates in the sea area,and the characteristics and regularities of erosinonal and depo- sitional evolution in the area in recent years are also explored.It is shown from the stud- y results that the sea area was generally in an erosional state during 1998 to 2006,and the depositional areas occurred in the western island chain channels and the inter-island inlets,which is related to the decrease in sediments discharged into the sea from the Changjiang River and the Yangshan Harbor project.The Yangshan Harbor inlet bloc- kade project has changed the local hydrodynamic environment and caused the changes in erosion and deposition in the western island chain channels and the inter-island inlets. The decrease in sediments dicharged into the sea from the Changjiang River and the large-scale reclamation project in the Changjiang River mouth and the Hangzhou Bay sea areas have reduced the sediment supply to the Qiqu Archipelago sea area and resulted in the general erosional trend in the sea area. |
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| Keywords: | Qiqu Archipelago Changjiang River mouth Hangzhou Bay erosional and depositional evolution water and sediment characteristics |
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