基于GPR图像的福建长乐海岸沙丘沉积构造与海岸环境演变

发布时间：2018-01-16 20:37

  本文关键词：基于GPR图像的福建长乐海岸沙丘沉积构造与海岸环境演变　出处：《海洋科学》2016年05期 　论文类型：期刊论文

  更多相关文章： 探地雷达(GPR) 海岸沙丘 沉积构造 海岸环境 长乐

【摘要】：为了探讨福建长乐东部海岸环境演变,运用探地雷达(GPR)探测了研究区海岸沙丘的沉积构造,初步得出以下结论:(1)研究区海岸沙丘沉积构造主要由海滩沉积和海岸沙丘沉积构成,其中下伏沉积为海滩波浪作用形成的波状交错层理,上覆沉积为风成大角度倾斜的交错层理以及局部的水平层理;(2)上部发育的倾向向背的大角度风成交错层理,反映了研究区丰富的沙源、宽阔的海滩、植被扩张的进积海岸特点;(3)从沉积序列分析,研究区海岸地貌环境演变经历了早期的滨岸浅海到晚期的海岸沙丘带两个阶段,反映了海岸向东的进积过程中,外力作用由波浪作用为主演变为风沙沉积作用为主。
[Abstract]:In order to study the evolution of coastal environment in eastern Changle, Fujian Province, the sedimentary structures of coastal dunes in the study area were investigated by using GPR. The following conclusions are drawn as follows: (1) the coastal dune sedimentary structures in the study area are mainly composed of beach deposits and coastal dune deposits, in which the underlying deposits are the wave-like interlaced bedding formed by the beach waves. The overlying deposits are staggered bedding and local horizontal bedding. (2) the tendency of the upper development to the back of the large angle wind is staggered and stratified, which reflects the characteristics of abundant sand source, wide beach and progradation coast of vegetation expansion in the study area; 3) from the analysis of sedimentary sequence, the evolution of coastal geomorphological environment in the study area has undergone two stages from the early shoreline shallow sea to the late coastal dune zone, which reflects the process of coastal eastward accumulation. The external force has evolved from wave action to aeolian sedimentation.
【作者单位】： 福建师范大学地理科学学院;湿润亚热带生态地理过程教育部重点实验室;福建师范大学地理研究所;
【基金】：国家自然科学基金项目(41271031,41301012,U1405231) 福建省自然科学基金项目(2013J01153,2014J01151)~~
【分类号】：P737.1
【正文快照】： 海岸沙丘是形成于陆地、海洋和大气系统交界面的相当复杂的现象[1-3],海岸沙丘的沉积构造类型及其组合特征,反映了砂质海岸特有的沉积相和沉积环境。因此,海岸沙丘是重建海岸环境演变历史的重要载体。以往对海岸沙丘沉积构造的研究,大多依赖于天然侵蚀剖面、人工探槽的直接观，

本文编号：1434751