| 上海洋山深水港区12年来海床冲淤变化分析 |
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| 引用本文： | 邵荣顺,吴明阳,左书华.上海洋山深水港区12年来海床冲淤变化分析[J].海洋工程,2012,30(1):106-111. |
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| 作者姓名： | 邵荣顺 吴明阳 左书华 |
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| 作者单位： | 上海市深水港工程建设指挥部;交通运输部天津水运工程科学研究所 |
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| 摘 要： | 洋山深水港区海域是由大、小洋山两条岛链围成的喇叭口型的海域,是以落潮流为主、高含沙量、强潮流的潮汐水道,泥沙运动主要以悬沙为主。通道内潮流基本为东南-西北向往复流,潮流平均流速为1.0～1.5 m/s,最大流速可达2.0～2.5 m/s,平均含沙量在1.4 kg/m3。对上海洋山深水港区的水文地貌特性、海床冲淤演变以及冲淤变化原因等作了分析。结果认为,伴随着工程建设的进程,陆域边界不断地改变,海床的冲淤演变也随着不断地调整,逐步形成了目前"南淤北冲"的海床冲淤格局。洋山港竣工后三年又步入了稳定的调整期,冲淤变化幅度趋于逐年减小。
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| 关 键 词： | 洋山深水港 海床冲淤变化 汊道封堵 原因分析 |
Analysis on seabed deposition and erosion of Yangshan Port during twelve years |
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| SHAO Rong-shun,WU Ming-yang and ZUO Shu-hua.Analysis on seabed deposition and erosion of Yangshan Port during twelve years[J].Ocean Engineering,2012,30(1):106-111. |
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| Authors: | SHAO Rong-shun WU Ming-yang and ZUO Shu-hua |
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| Institution: | 1.Project Construction Headquarters of Shanghai Deepwater Port,Shanghai 200122,China;2.Tianjin Water Transport Research Institute of MOT,Tianjin 300456,China) |
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| Abstract: | The Yangshan deep-water harbor is located in the Qiqu Archipelago with many islands and tidal channels.The cyclic tidal flow with an average velocity of 1.0-1.5m/s is the major dynamic force for maintaining the stability of the way and the sediment in flow is always under the combining action of waves and tidal currents.The seabed evolution is aroused by suspended sediment transport.The average suspended sediment concentration is 1.4 kg/m3.With project construction,land boundary constantly changes,and the seabed developed ceaselessly.During twelve years,the pattern and amplitude of seabed erosion and deposition changed considerably,gradually leading to the pattern of "siltation in the south and scouring in the north".The pattern became stable during three years after the completion.The scouring amplitude tended to decrease year by year.The branches blocking,port engineering construction and the keeping of Kezhushan branch changed the original tide flow and strength.These factors influenced the seabed changes remarkably and played a fundamental role. |
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| Keywords: | Yangshan deep-water harbor seabed deposition and erosion blocking of the branches analysis of causes |
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