潍坊人工沙滩海滩剖面演变特征及应用经验正交函数分析

发布时间：2018-03-17 03:29

本文选题：人工沙滩　切入点：经验正交函数　出处：《海洋地质与第四纪地质》2016年06期 　论文类型：期刊论文

【摘要】：对潍坊人工沙滩二期工程竣工后海滩实测地形剖面进行研究,应用经验正交函数(EOF)提取海滩2013年5月至2015年11月6次剖面监测数据中的前3个模态的空间特征函数和时间特征函数,分析竣工养护后海滩剖面的时空演变特征及海滩的平面变化特征。第一特征函数表示竣工后海滩的总体冲淤变化,受到东西两侧丁坝加长和中间T型坝修建的影响,剖面的侵蚀程度较一期工程明显减小;第二特征函数表示受地形和水动力作用影响,前滨带出现滩肩剖面和沙坝剖面的相互转化;第三特征函数反映风暴潮、人为因素等偶然因素的影响;从平面特征来看,人工沙滩中部、东部较西部侵蚀严重。可见,二期工程建设起到了优化的目的,大大改善了人工沙滩的侵蚀,但仍需要持续有规律的对海滩进行监测,进一步深化对人工养护沙滩建设和维护的认识。
[Abstract]:After the completion of the second phase of Weifang artificial beach project, the topography profile of the beach is studied. The empirical orthogonal function (EOF) is used to extract the spatial and temporal eigenfunctions of the first three modes from May 2013 to November 6th 2015. This paper analyzes the temporal and spatial evolution characteristics of beach profile after completion of conservation and the characteristics of beach plane variation. The first characteristic function indicates that the overall erosion and siltation of the beach after completion is affected by the lengthening of spur dikes on both sides of the east and west sides and the construction of intermediate T type dams. The erosion degree of the section is obviously smaller than that of the first stage of the project, the second characteristic function indicates that the beach shoulder section and the sand dam section are transformed in the foreshore zone under the influence of topography and hydrodynamics, and the third characteristic function reflects the storm surge. From the point of view of the plane characteristics, the erosion of artificial sand beaches in the middle and east is more serious than that in the west. It can be seen that the second phase of the project has served the purpose of optimization and greatly improved the erosion of artificial beaches. But we still need to monitor the beach regularly and deepen the understanding of artificial conservation beach construction and maintenance.
【作者单位】：国土资源部油气资源和环境地质重点实验室中国地质调查局青岛海洋地质研究所;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;
【基金】：海洋地质保障工程项目(GZH201200505,DD20160144) 国家自然科学基金项目(41106060)
【分类号】：P753

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