东海岛东北部典型岸段短期冲淤变化及影响因素分析

发布时间：2018-05-05 18:19

  本文选题：东海岛 + 海岸冲淤　； 参考：《海洋科学进展》2016年04期

【摘要】：通过无人机遥感、岸滩监测剖面、监测桩和沉积物粒度分析等手段研究了东海岛东北部典型岸段短期冲淤变化特征。结果表明,研究区岸线在一年半的时间内呈现后退趋势,侵蚀严重区域岸线平均后退约10m;岸滩夏季年度变化以侵蚀为主,侵蚀严重部位主要位于低滩,最大下蚀可达1m以上;半年度剖面监测结果显示,岸滩季节性变化明显,存在冬淤夏冲的特征;受风暴潮的影响,岸滩在2014-06—09发生严重侵蚀,部分区域后滨沙丘后退约20m;沉积物平均粒径分布的区域差异表明,沉积物有沿岸向北和向陆一侧运移的趋势。风暴潮、虾池排污和灯塔是影响东海岛典型岸段冲淤的主要因素。
[Abstract]:By means of UAV remote sensing, beach monitoring profile, monitoring piles and sediment granularity analysis, the characteristics of short-term scour and siltation in typical coastal sections in the northeastern part of the East Sea Island were studied. The results show that the shoreline in the study area shows a retrogressive trend in one and a half years, and the average receding of the shoreline in the seriously eroded area is about 10 m.The annual variation of the shoreline in summer is dominated by erosion, and the serious erosion area is mainly located at the low beach, and the maximum erosion can reach more than 1m. The results of semi-annual section monitoring show that the seasonal variation of shoreline is obvious, and the characteristics of winter silt and summer scour exist, and the beach is seriously eroded by storm surge in 2014-06-09. The regional difference of average grain size distribution of sediment indicates that there is a trend of coastal northward and landward migration of sediment. Storm surges, shrimp ponds and lighthouses are the main factors affecting the scouring and silting of typical coastal sections of the East Sea Island.
【作者单位】： 国家海洋局第一海洋研究所;国家海洋局第三海洋研究所;广东省海洋与渔业环境监测中心;
【基金】：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) 中央级公益性科研院所基本科研业务费专项资金资助项目——近50年来广西大陆岸线变迁及其与人类活动的关系(2012G09)
【分类号】：P737.1
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本文编号：1848785