| 东海岛东北部砂质岸滩年度冲淤变化及沉积物运移分析 |
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| 引用本文： | 李天光,高 伟,周庆杰,杨庆乐,杨奇铮,张彤辉,瞿洪宝.东海岛东北部砂质岸滩年度冲淤变化及沉积物运移分析[J].海岸工程,2016,35(4):10-18. |
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| 作者姓名： | 李天光 高 伟 周庆杰 杨庆乐 杨奇铮 张彤辉 瞿洪宝 |
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| 作者单位： | 1. 海洋沉积与环境地质国家海洋局重点实验室，山东青岛，266061; 国家海洋局第一海洋研究所，山东青岛，266061; 青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室，山东青岛，266061;2. 广东省海洋与渔业环境监测中心，广东广州，510222 |
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| 基金项目： | 国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目---海洋地质过程与环境(U1606401)；海洋公益性行业科研专项---我国典型海岛地质灾害监测与预警示范研究(201005010) |
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| 摘 要： | 东海岛是全国第五大岛,其东部长达28km的海滩是"中国第一长滩"。近年来因海平面上升和人类开发,该海滩局部出现较为严重的海岸侵蚀。基于高精度GPS监测结果及表层沉积物粒度测试结果,使用GSTA趋势分析模型,研究了东海岛东北部砂质岸滩的季节性冲淤变化及沉积物运移趋势,探讨了海岸侵蚀机制。结果表明,研究区岸滩沉积物的运移主要受潮流的控制,以沿岸向北运移为主。研究区南部岸滩紧邻低滩灯塔形成的波影区,沉积物供应较少,岸滩以侵蚀为主;研究区北部沿岸流搬运的沉积物能从南侧得到补给,加之向岸运移的沉积物,岸滩多处于淤积状态。
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| 关 键 词： | 东海岛 冲淤 沉积物运移 |
Annual Variation of Erosion and Deposition and Sediment Transportation Along the Northeastern Sandy Coast of the Donghai Island |
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| Abstract: | The Donghai Island is the fifth largest island in China .The 28 km‐long beach in the east of the island is the "First Long Beach of China"and can be comparable to the"Golden Beach"of Italy .However ,this beach has been locally eroded more seriously in recent years due to the sea‐level rising and the human exploring .Based on the data from high‐precision GPS monitoring and the grain‐size analysis of surface sediments and by u‐sing the GSTA model ,the seasonal variations of erosion and deposition and the tenden‐cy of sediment transportation in the sandy beach along the northeastern coast of the Donghai Island are studied and the coastal erosion mechanism is discussed .The results reveal that the sediments of the coastal beach are dominantly transported along the coast and dispersed to the north ,w hich is mainly controlled by the tidal current .Along the southern coast of the island ,beach erosion is dominant since the lighthouse located near‐by prevents the sediment supply .Along the northern coast ,the beach is in a deposition‐al state at many places ,because the sediment transported by the alongshore current can get supply from the south and there is also a sediment supply from the sea toward the land . |
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| Keywords: | Donghai Island erosion and deposition sediment transporation |
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